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
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.
|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;|
|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:|