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 gamma-ray integral flux within fast neutron pulses interval.
For quantity reduction of round-trip operations and simultaneous recording of several parameters, TzSP-O/C-90 tool can be produced as an integrated tool with the TzSP-GK-S-90 digital downhole gamma-ray spectrometry tool (100 mm diameter in complex) and also be completed with a thermometry channel.
Downhole tool is to be run with the log recorder Hector, Vulcan V3 and with tree-core cable.
*The TzSP-C/O-90 tool is certified
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 108 n/sec) and operation resource more 200 hours;
- technological program package for measurements process control and application program package for primary C/O logging data processing
Application field
Estimation of oil-and-gas saturation coefficient on value of the relative amplitude of C/O and Ca/Si anomalies taking into account layers lithology, neutron and effective porosity of the investigated collectors.
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, % | 10-100 |
| Basic relative error limits of KH measurements under normal conditions, % | ±7 |
| Scintillation detector BGO (bismuth germanate) size, mm | 50x150; 50x120; 50x100 |
| Cs-137 line resolution, % | up to 12 |
| Neutron generation frequency, kHz | 10 |
| Tool power supply, V | 200 |
| Time analyzer bandwidth, microsec | 2.0 |
| Width of the window time analyzer, ms | 2 |
| Number of registratable energy spectrum and channels in the spectrum | 3x512 |
| Number of registratable time spectrum and channels in the spectrum | 1x50 |
| «Dead» time of measuring channel, ms, up to | up to 3 |
| 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 - length | 100 3200 |
| Weight, kg | 50 |
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