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Detection method for reservoir changes of oil and gas fields

A detection method and technology for oil and gas fields are applied in the field of detection of reservoir changes in oil and gas fields, which can solve the problems of high cost, time-consuming and laborious replacement of probes, and achieve the effects of improving the recovery efficiency of heavy oil and reducing the cost of oil recovery.

Active Publication Date: 2015-03-04
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In view of this, the present invention aims at the technical problems of time-consuming and labor-intensive detection methods for oil and gas field reservoir changes, and the high cost of replacing probes, and provides a convenient, accurate, and economical method for detecting changes in oil and gas field reservoirs combined with microgravity measurement. detection method

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  • Detection method for reservoir changes of oil and gas fields
  • Detection method for reservoir changes of oil and gas fields
  • Detection method for reservoir changes of oil and gas fields

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Embodiment Construction

[0027] Firstly, the central inventive concept of the present invention will be described.

[0028] When detecting changes in oil and gas field reservoirs, the detection method includes the following steps:

[0029] Step 1. Measure and obtain the microgravity data, elevation data, and surface subsidence data of multiple measuring points on the surface above the oil and gas fields in different periods. After mastering the above raw measurement data, prepare for the comparative analysis later.

[0030] Step 2: According to changes in the microgravity data, elevation data, and surface subsidence data of multiple measuring points in different periods, inversion calculations are performed to obtain changes in oil and gas field reservoirs. Through the change of various measurement data at different measurement points, the change of the entire oil and gas field reservoir is obtained through comprehensive analysis.

[0031] When combined with the microgravity monitoring of steam cham...

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Abstract

A detection method for reservoir changes of oil and gas fields includes the following steps: A. measuring to obtain microgravity data, elevation data and earth surface sedimentation data of a plurality of measuring points of the upper earth surface of oil and gas fields at different periods; B. obtaining reservoir changes of oil and gas fields in a back calculation mode according to changes of the microgravity data, the elevation data and the earth surface sedimentation data of the plurality of measuring points at different periods. The detection method is suitable for information monitoring of reservoir changes during oil and gas field exploitation processes of mature oil and gas producing areas, especially for monitoring of steam chamber changes in thickened oil exploitation.

Description

technical field [0001] The invention relates to the technical field of petroleum development, in particular to a method for detecting changes in oil and gas field reservoirs. Background technique [0002] In the process of oil and gas field exploitation, changes in underground oil and gas reservoirs are important data that need to be understood. Thickened oil refers to high-viscosity heavy crude oil with a viscosity greater than 50 mPa·s under formation conditions, or a degassed crude oil with a viscosity of 1000-10000 mPa·s at the reservoir temperature. The viscosity of heavy oil changes significantly with temperature. If the temperature increases by 8-9°C, the viscosity can be reduced by half. Due to the relatively high viscosity of heavy oil, it is also more difficult to extract. Therefore, for the exploitation and transportation of heavy oil, heat is often used to reduce its viscosity. In order to extract heavy oil, it is often necessary to inject high-temperature gas...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00E21B43/24
Inventor 王真理胡卫剑江为为
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI