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Method and device for detecting gas bearing capacity of reservoir

A detection method and gas-bearing technology, applied in the field of petroleum geophysical exploration, can solve the problems of uncontrollable prediction results and low precision, and achieve the effects of reducing the interference of human factors, improving the precision, and reducing the multi-solution

Active Publication Date: 2021-03-16
PETROCHINA CO LTD
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current detection methods for reservoir gas content still have the defects of low precision and uncontrollable prediction results.

Method used

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  • Method and device for detecting gas bearing capacity of reservoir
  • Method and device for detecting gas bearing capacity of reservoir
  • Method and device for detecting gas bearing capacity of reservoir

Examples

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Effect test

Embodiment 1

[0036] This embodiment provides a method for detecting gas-bearing properties of reservoirs (see figure 1 ), including the following steps:

[0037] Step 101: Input well logging data and seismic data

[0038] During the implementation process, the input logging data includes: P-wave velocity curve, S-wave velocity curve, density curve and logging oil-gas-water interpretation results, and the input seismic data includes: P-wave velocity, S-wave velocity obtained from pre-stack seismic inversion and a density seismic data volume.

[0039] Step 102: Construct petrophysical analysis scale based on well logging data

[0040] During the implementation process, based on the input logging curves and logging oil, gas and water interpretation results, a petrophysical analysis scale is constructed. The abscissa of the scale is X, and the ordinate is Y, X=ρ / v s , Y=ρv p , ρ is the density, the unit is g / cm 3 ,v s is the shear wave velocity in Km / s, v p is the longitudinal wave velo...

Embodiment 2

[0060] This embodiment also provides a reservoir gas-bearing property detection device for realizing the above-mentioned reservoir gas-bearing property detection method. For details, see figure 2 , the device consists of:

[0061] The input unit 201 is used to input well logging data and seismic data; wherein, the well logging data includes compressional wave velocity curve, shear wave velocity curve, density curve and well logging oil, gas and water interpretation results; the seismic data includes: longitudinal wave obtained by pre-stack seismic inversion velocity, shear wave velocity, and density.

[0062] The analysis unit 202 is used to construct a petrophysical analysis scale based on well logging data; the specific method includes: constructing a petrophysical analysis scale based on the compressional wave velocity curve, shear wave velocity curve, density curve in the well logging data and the well logging oil, gas and water interpretation results , where the absciss...

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Abstract

The invention provides a method and a device for detecting gas bearing capacity of a reservoir. The method for detecting gas bearing capacity of a reservoir comprises the following steps: (1) acquiring logging data and seismic data; (2) constructing a rock physical analysis quantity plate based on the logging data; (3) fitting a water-containing sandstone linear trend line based on the rock physical analysis quantity plate; (4) constructing a gas-containing sandstone prediction factor based on the rock physical analysis quantity plate and the water-containing sandstone linear trend line; (5) substituting the seismic data into a calculation formula of a gas-bearing sandstone prediction factor to obtain a gas-bearing sandstone prediction factor seismic data volume; and (6) carrying out reservoir gas-bearing property detection based on the gas-bearing sandstone predictor seismic data volume. According to the method, the multiplicity of solutions of reservoir prediction can be reduced, andthe exploration and development precision is improved.

Description

technical field [0001] The invention relates to the field of petroleum geophysical exploration, in particular to a method and device for predicting high-porosity hydrocarbon-bearing sandstone reservoirs. Background technique [0002] In the process of oil exploration, pre-stack inversion and petrophysical analysis techniques have been applied more and more, and good application results have been achieved in different research blocks. Reservoir identification factors can realize the function of distinguishing sandstone reservoirs and mudstone caprocks to a certain extent. Classic reservoir identification factors include: P-to-S wave velocity ratio, Poisson’s ratio, Poisson’s impedance, and Russell fluid factor. Different identification factors in the basin have different applicability, and sensitivity analysis is required in the actual application process. Usually, identification factors with strong sensitivity to reservoir lithology and fluid need to introduce undetermined ...

Claims

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Application Information

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IPC IPC(8): G01V1/30G01V1/40
CPCG01V1/306G01V1/40G01V2210/6161G01V2210/6169G01V2210/624
Inventor 王磊陈彬滔白洁杜炳毅雷明薛罗徐中华刘雄志何世琦马轮史江龙
Owner PETROCHINA CO LTD
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