Radioactive Well Logging Methods

TzGS-1 DIGITAL GAMMA-RAY SPECTROMETER

is designed for Uranium, Thorium, Potassium content determination along oil and gas wells up to 10000 m deep and 76-300 mm in diameter through natural gamma-ray energy distribution. TzGS tool can be combined with any type of computerized well logging stations. Features and Advantages interval-by-interval gamma-ray spectra accumulation in the downhole tool for the further digital data telemetering; natural gamma-spectrum soft component analysis; improved accuracy while U, Th, K content determination. Specifications Content measurement range, %: K 0.1-50 U (1-1000)•10-4 Th (1-1000)•10-4 Basic relative error limits of a separate component content, % 15 Quantization levels number 128 Operating pressure, MPa 60, 80, 100 Maximum operating temperature, °C: 120 Downhole dimensions, mm diameter 48, 73, 90, 110 length 1200 Weight, kg 15, 40, 50, 60 Borehole measurement results TzGS-1 gear measurement results   Gamma-ray spectrometry application in solving of geological problems

DIGITAL GAMMA-RAY SPECTRAL LOGGING TOOL TzSP-GK-S-43/48/60/90

is designed for natural radioactive element content quantitative measurements: thorium (Th), uranium (U) and potassium (K) in different wells. Features and Advantages interval-by-interval full gamma-spectra accumulation and further digitized data telemetering; improved accuracy in Th U K detection; borehole design effect analytical accounting (diameter, casing, cement bond); referenceless energy scale stabilization and calibration, gain control. Specifications Weight content measurements range, %: K 0.1-20 U (1-100)•10-4 Th (1-100)•10-4 Gamma-ray energy recording range, MeV 0.06-3 Measurement basic relative error, % up to 5 Scintillator detector type CsJ(Na), NaJ(Tl), BGO Energy resolution of gamma-ray line 660 KeV, % up to 12 Energy channel quantity 256 Data transmission rate (Manchester-2 code), kilobaud 42 Power supply voltage, V 50-75 Current consumption, milliampere up to 100 Maximal operating pressure, MPa 20-60 Maximal operating temperature, °C 75-120 Downhole tool dimensions, mm: diameter 43/48/60/90 length up to 1200 Weight, kg up to 6/8/10/15 The digital gamma-ray spectral logging tool TzSP-GK-S-43/48/60/90 contains registration and processing electronic module, telemetry system and scintillator detector with photoelectronic multiplier. The tool is equipped with full software for Vulkan, Gektor recorder and interpretation software for logging in open and cased boreholes.

TECHNOLOGY OF RESERVOIR IDENTIFICATION AND SATURATION NATURE ESTIMATION WITHIN THE OIL-AND-GAS-PRODUCING WELLS WITH SNGK- AND SGK-METHODS

We offer technology of reservoir identification and saturation nature estimation within cased oil-and-gas- producing wells by spectrometry neutron gamma-ray logging (SNGK) and spectrometry natural gamma- ray logging (SGK)-methods. Problems to be solved: lithology dismembering of a geological section based on studying of the neutron and gamma-ray properties and radioactive element contents (H, Cl, B, Fe, Ca, Si, etc.) and their relations; reservoir identification and porosity coefficient determination; oil-saturation coefficient determination; clay mineral composition determination; identification of the polymictic sandstones with high content of potassic fieldspar, and monazite sandstones with high content of thorium within the high-radioactive reservoir sections; identification of a fractured reservoir as well as zones of the limestone secondary dolomitization by an increased content of uranium; identification of the watered intervals by geochemical anomalies induced by radium accumulation on the cement stone due to traveling of the first-line front of injected brine water within an oil-bearing formation. The technology is carried out by a complex digital apparatus of spectrometry radioactive logging (SNGK-K) that provides wide-range spectrometry of neutron gamma-ray logging (SNGK) as well as spectrometry of GR-S natural gamma-ray that was developed by JSC VNIIGIS jointed with JSC GITAS. Small diameters of the downhole tools (48 and 90 mm) allow to use them for through-tubing well surveying. A downhole tool of 90 mm in diameter is equipped with a thermometer. Features of a complex improved information capacity due to application of wide-range SNGK modification in a dual-sonde version; it is possible to carry out multi-method measurements by one trip. JSC VNIIGIS and JSC GITAS supply tools and service in geological problem solving by the offered technology.  Example of reservoir identification and saturation nature estimation within the oil-gas-producing wells with SNGK- and SGK-methods

SNGK-Sh-2 DIGITAL SPECTRAL NEUTRON WIDE-RANGE GAMMA-RAY LOGGING TOOL

is designed to register energy spectrum gamma-ray radiation, forming: - from natural radioactive elements; - during neutron deceleration and absorption process from sealed radionuclide source and high-energy gamma-radiation dissipation. Registered information can be used for: determination natural radioactive elements (U, Th, K) concentration; determination clay mineral assembledge; determination fluid content; lithological breaking-up of well cross-section; estimatation of elements concentration (Cl, H, Si, Ca, Fe, Mn, Ni, Co,etc.), anomalously absorbing thermal neutrons; dissepating and absorptive neutron and gamma-ray rock parameters and its ratios. Features and Advantages register gamma-ray logging in energy wide range, increasing SNGK methodic possibility; SNGK-Sh/GK-S/NAK-S methods' performance during the single trip; the tool is a triple-sonde module with three multichannel energy spectrometers for full gamma-spectra radiation. Specifications Gamma-quantum measurements range, MeV: GK spectrum 0.06-3.0 SNGK-Sh spectrum 0.03-9.0 Energy resolution, % no more than 12 Energy scale instability, % no more than 1 Spectrometric track dead-time, microsec 4 Maximum cable length, mm 5000 Maximum pressure, MPa 40; 100* Operating temperature range, °C from -5 to +120 Tool dimensions, mm: diameter 90 length 2950 Weight, kg 55; 85* * depends on housing material Delivery in complete set: downhole tool, interface unit, technological software, maintenance tool, spare parts and accessories, certificate, operating manual.

SNGK-Sh DIGITAL GAMMA-RAY GROSS-COUNT SPECTRAL LOGGING TOOL

is designed for reservoir saturation nature determination, lithological profiling, abnormal thermal neutrons absorbent estimation (Cl, H, Si, Ca, Fe, Mn, Ni, Co, et al.), estimation of scattering, absorbing neutron and gamma-ray parameters as well as their ratio. Registered information can be used for: reservoir saturation character determination; downhole cross-section lithological breakdown; element content estimations, which anomalously absorb thermal neutrons (Cl, H, Si, Ca, Fe, Mn, Ni, Co and others); estimations of dissipative and absorptive neutrons and gamma-radial parameters in rock and their correlation. Features and Advantages registrate gamma-radiation in wide energy range, increasing SNGK methodical possibilities; the tool is made in the form of digital two sonde module, which contains two multichannel energy spectrometers. Specifications Gamma-quantum measurements range, MeV 0.06-8.0 Energy resolution, % up to 12 Integral nonlinearity of spectrum energy scale, % up to ±3 Energy scale instability, % up to 1 Spectrometric track dead-time, microsec 4 Maximum cable length, mm 5000 Maximum pressure, MPa 60 Operating temperature range, °C from -5 to +120 Tool dimensions, mm: diameter 48 length (without centralizers) up to 1650 length (with centralizers) up to 3000 Weight (without centralizers), kg up to 12 Weight (with centralizers), kg up to 21  Results of downhole measurements with SNGK-Sh tool Delivery in complete set: downhole tool, interface unit, technological software, maintenance tool, spare parts and accessories, certificate, operating manual.

TECHNOLOGY OF RESERVOIR IDENTIFICATION AND POROSITY, OIL/GAS SATURATION COEFFICIENTS AND HYDROCARBON CONTENT DETERMINATION BY NEUTRON METHODS COMPLEX (2NNKt+SNGK-Cl)

We offer a technology for reservoir identification and porosity, oil/gas saturation coefficients and hydrocarbon content determination by 2NNKt+SNGK-Cl neutron methods complex. Oilsaturation determination is realized by "chlorine deficit" in oilsaturated reservoir in comparison to watersaturated, gas-saturation determination is realized by "density deficit" in gas-bearing reservoir in comparison to oilbearing and waterbearing. Geological problems to be solved lithology determination; reservoir identification and porosity coefficient determination according to 2NNKt, NGK-60 methods; oil/gas-saturation coefficient determination in cased wells; hydrocarbon content determination in cased well reservoir; oilbearing interval identification, watered by fresh waters in cased wells; free-salined salinity zone identification at the expense of column seal failure by mineralized waters, injected in oilbearing beds in order to provide bottom-hole pressure in cased wells; washing fluid saline filtrate penetration interval identification in reservoir beds with low formation water mineralization; washing fluid fresh filtrate penetration interval identification in reservoir beds with high formation water mineralization; identification of intervals with residual gas-saturation in open hole. This technology is performed by SPRK digital radioactive spectral logging tool for several measurement methods: SNGK spectral neutron-gamma-ray logging, 2NNKt dual-sonde epithermal neutron logging and NGK-60 method is realized when registing capture gamma-rays of thermal neutrons with energy up to 500 keV. At Customer's demand the equipment may also include natural gamma-spectral method (GK-S). The equipment is developed by OJSC SPE VNIIGIS together with CJSC SPE GITAS. The downhole tools duameters of 90 and 48 mm provide through-tubing surveying. 2NNKt and NGK-60 geological-geophysical characteristics completely answer the nuclear logging equipment properties. This provide the continuity of porosity methods. In that case the technology is applicable in oil-and-gas field development monitoring. Besides, SNGK method provides understanding of rock material composition effects on the oil-and-gas saturation coefficient, that improves the reliability of the reservoir saturation nature determination. The technology was successfully tested in different geological-technical well conditions of Kazakhstan, Ural-Volga region, Western Siberia oil/gasbearing province, China and also including directional/horizontal well logging conditions OJSC VNIIGIS and CJSC GITAS provide equipment delivery and render service on geological problems solving with the provided technology.  Hydrocarbon saturation character and content determination in reservoir acording to SNGK-Cl, 2NNKt and C/O logging method complexes

SPRK AND SPRK-M DIGITAL RADIOACTIVE SPECTRAL LOGGING TOOL

is designed for lithology determination, reservoir identification, porosity coefficient determination, oil and gas saturation determination through chlorine and boron content measurement. Features and Advantages performed on modern scientific-and-technological level and realize all rock geological parameters estimation technologies on the base of stationary neutron sources; provide 2NNKt , NGK-60 and SNGK (SPRK) and SGK (SPRK-M) methods performance during one single trip; equipped with the standard sondes NNK, NGK and spectrometric NGK sonde. Specifications SPRK SPRK-M NNK sonde 2 2 SNGK-Cl sonde 1 1 SGK sonde 1 1 Maximum operating pressure, MPa 80 120 Maximum operating temperature, °C 120 150 Tool diameter, mm 45, 76, 90 45, 76, 90 Weight, kg 15, 25, 70 15, 25, 70 Complete set delivery: downhole tool, interface unit, technology software, spare parts and accessories, certificate, operating manual.

LPK-Tz DIGITAL LITHO-DENSITY LOGGING-EQUIPMENT

is designed to determine rock density and rock effective atomic number in oil-and-gas wells. Problems to be solved: lithology definition; porosity estimation in two-component rock matrix. Features and Advantages simultaneous density estimation ρ and rock effective atomic number determination Zeff; ρ and Zeff determination improved accuracy at the expense of scattered GR full spectrum analysis when Zeff determining. Specifications Measurements range: rock density, g/cm3 1.5-3 effective atomic number, unit 10-20 Measurement error: density, % ±2 effective atomic number, unit ±0.25 Spectrometer quantization levels number 128 Maximum operating temperature, °C 120 Maximum operating pressure, MPa 80 Downhole tool dimensions, mm: diameter 48, 90 length 1500, 2500 Weight, kg 70    Lithology log results usage for elaboration cross-section lithology and rock density estimation

TzSP-LPK-76 DIGITAL DOWNHOLE COMPENSATED LYTHO-DENSITY GAMMA RAY LOGGING TOOL

is designed for density quantitative measurement and rock formation effective atomic number determination within prospecting and exploratory oil and gas open holes 90-250 mm in diameter. Features and Advantages to be run with a logging station equipped with digital recorder VULKAN and others, which provide recording and storing downhole data in a digital code Manchester-2; processing method provides near-field effects compensation (mudcake thickness up to 20 mm) and referenceless source energy scale temporary variability; density quantitative measurement and rock formation effective atomic number determination provide rock lithology determining according to 3-component model; the equipment has a field calibrator for bulk density and effective atomic number. Specifications Rock volume density range ρ, g/cm3 1-3 Rock effective atomic number measurement range Z, a, u 10-18 Density basic relative error limits, % ±1.2 Effective atomic number basic relative error limits, % ±2 Compensation range for mudcake effects (mudcake density up to 1.8 g/cm3), mm 20 Downstream amplitude impulse, V 1-10 Power supply, V 50-75 Power consumption, W 40 Maximum operating temperature, °C 80, 120, 150 Maximum hydrostatic pressure, MPa 60 Dimensions, mm: length 3080 diameter 76 Weigth, kg up to 70 Downhole tool can be run with three-core logging cable. Delivery set: downhole tool, technological and applied software.

PARK-1 DUAL-ZONDE DENSITY GAMMA-GAMMA LOGGING APPARATUS WITH ELECTROMECHANICAL CLAMPING DEVICE

is designed for rocks volume density estimation in section of oil-bituminous, ore and coal wells with a depth up to 5000 m and hole diameters ranging from 76 to 400 mm. Features and Advantages scattered gamma-ray measurements are conducted at two different distances from source; during measurements the sonde is clamped to the well side by the surface control system; wide range of measured density; absence of drilling mud and clay coating effects on the investigation result; cased-hole investigation. Specifications Measured density range, kg/m3 1•103 - 4.5•103 Density measurements error, % ±2 Operating temperature, °C from -30 to +120 Maximum pressure, MPa 60 Gamma-ray source Cs-137 Source activity, mg-eq Ra 20-40 Overall dimension, mm: diameter (when the lever is closed) 48 length 1700 Max. arm opening, mm 400 Weight, kg 25

PARK-1M DUAL-ZONDE DENSITY GAMMA-GAMMA LOGGING APPARATUS WITH ELECTROMECHANICAL CLAMPING DEVICE

is designed for rocks bulk density estimation in section of oil-bituminous, ore and coal wells with a depth up to 1000 m and hole diameters ranging from 42 to 200 mm. Adapted to Russian digital log recorders such as GECTOR, VULCAN, KEDR, etc. Features and Advantages scattered gamma-ray measurements are conducted at two different distances from source; during measurements the sonde is forced against the well side by the surface control clamping system; wide range of measured density; drilling mud and clay coating doesn't effect instrument readings; open-hole investigation; dry and all type of mud system investigation. Specifications Measured density range, kg/m3 1•103 - 3•103 Density measurements error, % ±3 Operating temperature, °C from -10 to +90 Maximum pressure, MPa 10 Gamma-ray source Cs-137 Source activity, mg-eq Ra 10-30 Overall dimension, mm: diameter (when arms are closed) 36 length 1700 Max. arm opening, mm 280 Weight, kg 15

TECHNOLOGY FOR CURRENT OIL SATURATION ESTIMATION THROUGH NUCLEAR LOGGING METHODS

is designed for a current monitoring of designing oil and oil/gas ledge by a complex of nuclear-geophysical methods, which contain of spectral impulse neutron gamma-ray (INGR-S or C/O logging), dual modification impulse neutron gamma-ray (2INGR, 2INNL) and spectral natural gamma radiation logging (SGR). Problems to be solved: information supply for effective control of design process of productive oil and gas ledges according to results research of cased well of old fund, and also newly drilling wells; volumetric reservoir model elaboration considering the nature of natural gamma-radiation and elemental rock composition; rock pore space fluid model determination; oilsaturated ledge emissions; current productive ledge coefficient evaluation; watering interval emission with evaluation. Carbon-oxygen logging (C/O logging) is realized with the usage of, by a modern well, TzSP C/O-90 software-controlled apparatus with high-frequency neutron generator on MEV 14, fast register channel and telemetry, energy and temp fluence rate spread of gamma radiation, appearing in a result of neutron reaction on nuclears of rock-forming elements. It is related to methods of weight content rock-forming elements determination. Carbon-oxygen logging is direct method ledge emisions, containing carbons. Fluent rate from nuclears to carbon and oxygen, which decrease according to ledge watering in consequence of it replacement by water irrespective of mineralization, is used as a carbon content measure. Impulse neutron logging is represented by software multisonde apparatus of new generation with a high speed of measuring channel and registration ability of multi-channel temp fluence thermal neutron spread (INNK) and gamma-radiation of radiative capture (INGK)- TzSP 2INNK and TzSP 2INGK. The method allows to trace water-oil contacts, to estimate reservoir saturation character in conditions of mineralized ledge water, to learn desalting dynamics and exploited ledge salinisation. In complex with C/O logging data 2INGK results allow to determine fluid reservoir model in detail and unambiguously, specify watering intervals, quantitively estimate a part of nonsaline fluid in reservoir. Spectral gamma-ray logging (SGK) is made by TzSP GK-S apparatus with the aim of estimation uranium,potassium, thorium radiactive elements. SGK allows to determine the type of clay mineral in clayish cross-section or pinpoint hightened natural radioactivity of Polymistic sandstone, radioactive bitumen or secondary converted rocks. Received information is used for revision of rock property in reservoir and for improving of interpretation uniqueness of C/O logging results. SGK realization in cased borehole allow to record radiogeochemical anomalies, connected with a process of water encroachment. Complex of nuclear-geophysical method have large informativity and decide large spectrum of problems both of oilfield and geological prospecting plan. Borehole equipments are certified and have sanitation-and-epidemiological conclusion on their usage. Borehole equipment production is made according to individual agreement with a client by rendering services on exploration and usage modern technologies of borehole research. Apparatus development for each type of logging are accompanied by development and adaptation of software and algorythmic support for preprocessing of research results. Complex result interpretation technique together with data of GIS, registered on open sidetrack, is designed to get geological results. Nuclear-geophysical apparatus metrological verifying in metrological centre OAO NPP VNIIGIS. Metrological centre contain model park in view of reservoir imitators of different density, porosity, lithology and saturation, part of which is certified as State Standard (SS). Today the effectivity of nuclear-geophysical methods complex usage is proved on the example of several thousands wells in West Siberia, Volga region, Kazaxstan and other regions of Russia and neighboring countries.  The results of complex nuclear-geophysical method interpretation according to oilsaturation determination

TzSP-C/O-90 DOWNHOLE DIGITAL CARBON-OXYGEN LOGGING TOOL

is designed for quick oil saturation estimating and rock ultimate composition due to multichannel registration of inelastic scattering/radiative capture energy spectra but also due to recording an additional time spectrum of induced GR integral flux within fast neutron pulses interval. Features and Advantages simultaneously-consecutive registration of 3 energy spectrums according to 512 quantization signal levels according to amplitude and summary gamma-radiation temporal spectrum according to 50 channels; the use of high-frequency impulsive (10 khz) fast neutron ING-06 radiator of increased power (more than 108 n/sec) and operation resource more than 200 hours; technological program package for measurements process control and application program package for primary C/O logging data processing. The downhole tool is a module cylinder construction of 90 mm in diameter (iron protective housing) or 100 mm (aliminium protective housing), its upper case contains an electronic circuit with a power supply block, its lower case contains ING-06 type neutron transmitter and the detecting block comprising of a thermostatted mono-crystal BGO of 50×100 mm in dimensions with FEU-184 type photo-electrical multiplexer. An electronic module is constructed according to microschemes of programmable logic and microcontrollers, that allows to control tool operation parameters. The downhole tool is connected to an on-board system with one- or three-core cable. Depending on a command content, the tool successively carries-out operations on adjustment and testing of operating regimes, on recording and transmitting the data about channel parameters and information storage in quantization intervals about inelastic scattering gamma-ray, radiation capture gamma-ray and epithermal neutron space-time and energy distributions. Three energy spectra from a scintillation detector contain the information about inelastic scattering gamma-ray at the moment of the fast neutron emission, about the background emission and radiation capture gamma-ray within the time interval 40-98 microsec. The time spectra of the induced gamma-ray and of epithermal neutrons is recorded during 100 microsec between the fast neutron pulses of 2 microsec in window width. On-board computer with a digital logging recorder is used for gathering, control and recording of data flow. The software contains programs of the data displaying in a form of three energy spectra and one time spectra, spectra preprocessing including energy calibration, background gamma-ray radiation registration, analytical parameters C/O, Ca/Si etc. calculation, an output to a printer in a form of diagrams, the spectral intensities of a given scale by an amplitude and by a borehole depth; a service program packet to carry out different functions on scaling, diagram distribution and their correction. Application field Measurement of inelastic scattering gamma-ray, radiation capture gamma-ray and epithermal neutron spacetime and energy distributions provides the principle conditions for calculating of partial contributions from the basic oil-, water- and rock-forming element nuclei (C, O, H, Si, Ca, Fe, Cl, etc.) as well as for calculating different relations associated by the correlation dependences with the filtration-capacity parameters, rock lithology and fluids (oil, water) which saturates them. Specifications Terrigenous reservoir oil saturation KH measurements range, % 1-100 Basic relative error limits of KH measurements under normal conditions, % 10 Scintillation detector BGO (bismuth germanate) size, mm 50×150 Cs-137 line resolution, % up to 12 Neutron generation frequency, kHz 10 Neutron generator operational life, h 200 Tool power supply, V 200 Time analyzer bandwidth, microsec 2.0 Spectrum channel quantity 512 Recorded spectra quantity 4 Data transmission code Manchester-2 Data transmission rate (through logging cable), kbaud 42 Tool retrieving speed, m/h 50-70 Max.operational temperature, °C 120 Max. hydrostatic pressure, MPa 60 Tool dimensions, mm: diameter 100 length 3200 Weight, kg 50 Delivery set: downhole tool, technological and applied software.    Examples of oil-saturated reservoir identifying by C/O logging diagrams

TzSP-2INNK-43/60/90 (TzSP-2INGK-43/90) DUAL- SONDE PULSE NEUTRON-NEUTRON (PULSE NEUTRON GAMMA RAY) LOGGING METHOD-AND-APPARATUS COMPLEXES (AMK)

is designed for rock neutron characteristics determination and reservoir oil-and-gas-saturation estimation by means of thermal neutron unsteady flow multichannel registration or gamma-quantums of radiative capture simultaneously on both sondes in cased and open exploration and explotaition well of oil and gas fields. Complexes include:  The example of INGK use for current oilsaturation determination. Komi. dual-sonde digital down-hole tools of pulse neutron-neutron logging or pulse neutron gamma ray which provide simultaneous record of the thermal neutron non-stationary flows or gamma-quanta of radiation capture in the form of 64-channel time spectra at two spacing, respectively, from the ING-101-type neutron emitter and from a generator of enhanced energy (>108 n/s) the operational resource of which is more than 200 hours; on-board system that contains a computer; a digital logging recorder, a downhole tool power unit which provides control of AMK operation mode, information acquisition by one- or three-core logging cable, and its recording; technological and application program package for control of the operation technique as well as for recording and preprocessing of the multi-dimensional information at the well-site. The downhole tool is a two-module cylinder construction of 90 mm in diameter; its upper case contains an electronic circuit with detectors, its lower case contains the neutron transmitter and the power unit. For thermal neutron detecting in the downhole tool TzSP-2INNK-43 following counters are used: in a smaller sonde the SNM-56, in a bigger sonde the SNM-18. In the TzSP-2INNK-90 construction, cassettes which consist of three counters are used as well as the SNM-56 and the SNM-18, placed on 38 and 65 centimeters distances. An electronic circuit of the tool is the system of data acquisition, data expansion to a time spectra and data communication by logging cable to a board recorder. The electronic circuit is based on a fast microcontroller. The only difference between the TzSP-2INGK and TzSP-2INNK-43/90 downhole tools is the detecting system. For the TzSP-2INGK-43/90 scintillation NaJ-detectors are placed instead of thermal neutron counters. Detectors dimensions are 18×40 and 18×160 for the TzSP-2INGK-43, or 50×50 and 50×100 for the TzSP-2INGK-90. The downhole tool is connected with an on-board system by one- or three-core cable. Depending on command content, the tool successively carries out operations on the adjustment and testing of operating modes, recording and transmitting the data about channel parameters and information storage in the quantization intervals about an inelastic scattering gamma-ray, radiation capture gamma-ray and epithermal neutron space-time and energy distributions. Three energy spectra from a scintillation detector contains the information about inelastic scattering gamma-ray at the moment of the fast neutron emission, about the background emission and radiation capture. An applied software includes the following programs: the complex calibration programs considering "dead" time of the recording paths by the measurements in a water-filled tank; interpretation parameter calculation program by 1- or 2-component models, namely, thermal neutron decay time in a formation and near zone; formation and near zone original amplitudes; the back-ground components for each sonde; calculation of any derivative parameter by 1- or 2-component model; programs of data displaying and printing in the form of diagrams in the given amplitude and depth scale; a program service package to redact the data with a given calibration step by depth, as well as to redact a single record point, for time scale compressing and expanding; for positive depth forming; for correcting by magnetic marks; for storing and loading-in of configuration; for specifying the dimensions and numbers of the margins for a display and a printer; of plotted diagram types; their displacements and other functions. Preprocessing results are represented as diagrams or as LAS file. Advantages The measuring of space and time distribution of thermal neutrons or radiation capture gamma-quanta in boreholes provides an increased reliability and simplicity of the oil-field and oil-prospecting geophysics conventional problem solving and allows obtaining information about a proximate zone condition as well as about the vertical bedding of the section under study. The use of INNK tool comparing to pulse neutron gamma-ray logging tool is effective in rocks with high natural radioactivity and radioactive sault sediments in wells. The use of INGK tool comparing to pulse neutron gamma-ray logging tool allows to get higher statistics of registered radiation and it is also effective in wells, cased by glass-reinforced plastic pipes. Specifications TzSP-2INNK-43/60/90 TzSP-2INGK-43M TzSP-2INGK-90 Thermal neutron lifetime measurement range τ, microsec 50-1000 50-1000 50-1000 Thermal neutron lifetime measurement relative error τ, % ±2 ±2 ±2 Water-filled porosity measurement range, % 1-40 1-40 1-40 Number of sondes in the downhole tool 2 2 2 Sonde lengths, mm 400 and 600 400 and 600 400 and 600 Slow neutron counters type SNM-56,18 NaJ-18×40,NaJ-18×160 NaJ-50×50,NaJ-50×100 Dead-time of the recoding channels, ms 1 1 1 Number/width of time spectra recoding channels, microsec 2×64/40 2×64/40 64/40 Neutron generator type ING-101T ING-101T ING-06 Operating frequency of the neutron generator, Hz 20 20 400 Output of neutron generator, n/s >108 108 108 Service life of neutron generator, hr 50-100 50-100 200 Logging cable type one-core, three-core one-core, three-core one-core, three-core Data propagation rate by a cable, kbaud 20 20 20 Downhole tool supply, V 150 150 150 Max operation temperature, °C 120 120 80 or 120 Max operation pressure, MPa 100 100 80 Downhole tool dimensions, mm: diameter 43/60/90 43 90 length 3100 3100 3000 Weight, kg 15,20,25 25 30

2NNK-43/60 DUAL-SPACING NEUTRON LOGGING TOOL

is designed for effective porosity quantitative measurement and borehole lithology identification in different wells. Features and Advantages downhole tool small diameter; eliminates pulse miscounting due to dead time correction of recording channels, which includes signal analog transmission with bipolar 10-20 microsecond pulses, using statistic compensation circuits; high-performance helium-filled neutron counter. Specifications Water-saturated porosity measurement range, % 1-40 Relative measurement error, % 5 Probe length (short/long), mm 300/600 Tool length variability, mm 3/100 Signal transmission bipolar pulses Power supply voltage, V 50-60 Max. neutron output, neutron/sec 2•108 Max. operating temperature, °C 120 Max. operating pressure, MPa 100 Downhole tool dimensions, mm: diameter 43/60 length 1600 Weight, kg 12/18 The tool can be run with one-core and tree-core cable.

2NGK-43/60 DUAL-SPACING NEUTRON GAMMA RAY LOGGING TOOL

is designed for water-saturated porosity coefficient determination in different boreholes. Features and Advantages downhole tool small diameter; eliminates pulse miscounting due to dead time correction of recording channels, which includes signal analog transmission with bipolar 10-20 microsecond pulses, using statistic compensation circuits; high-performance helium-filled neutron counter. Specifications Water-saturated porosity measurement range, % 1-40 Measurement basic relative error, % 5 Probe length (short/long), mm 300/600 Downhole tool supply voltage, V 50-60 Neutron generator max. output, n/sec 5•106 Max. operating temperature, °C 120 Max. operating pressure, MPa 100 Downhole tool dimensions, mm: diameter 43/60 length 1200/1600 Weight, kg 12/18 2NGK-43/60 logging tools are to be run with one-core and tree-core cable.

RKMT-43 HOSTILE-ENVIRONMENT DOWNHOLE NUCLEAR LOGGING TOOL

is designed to determine exposure-dose rate and water-saturate porosity at maximum temperatures in different wells. Specifications Gamma-ray detector type SI31G Gamma sensitivity, (pulse/min)/(micro-Roentgen/h): GR channel from 50 neutron GR channel from 25 Direct supply current, mA 180±20 Power consumption, W 30 Non-stability of readings under the destabilizing factor influence without considering a statistical error for 5 hours of continuous work, % up to ±3 Complementary error, %: while temperature changing by 50 °C up to ±5 while supply voltage changing by ±5% up to ±1 Output pulses length recorded by 200-Ohm resistor when connected with 5000-m cable equivalent (while the natural background recording) for GR- and NGR-channels, μsec up to 150 Max. operating temperature, °C 200 Max. operating pressure, MPa 120 Tool dimensions, mm: diameter 43 length (NGR probe length 500 mm) 3260 Weight, kg 20 RKMT-43 logging tools are to be run with one-core and tree-core cable up to 5000 m long.