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Tight reservoir sweetness evaluation method and device

A tight reservoir and sweetness evaluation technology, applied in the field of exploration and development of tight reservoir gas reservoirs, can solve the problems of low accuracy, failure to consider the development degree of natural fractures and fracturing fluid fluid seepage into fractures, and large errors in characterization results , to improve the evaluation accuracy

Inactive Publication Date: 2017-09-29
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, organic carbon content, vitrinite reflectance, and mineral component content are indirect characterization parameters that reflect the gas-bearing properties of reservoirs, and the characterization results have large errors
And the brittleness index is characterized by mineral composition, without considering factors such as the development degree of natural fractures and the penetration of fracturing fluid into fractures, so the accuracy of guiding fracturing mining and construction is low

Method used

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  • Tight reservoir sweetness evaluation method and device
  • Tight reservoir sweetness evaluation method and device
  • Tight reservoir sweetness evaluation method and device

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Effect test

Embodiment 1

[0028] figure 1 It is a schematic flow chart of the method for evaluating the sweetness of tight reservoirs provided in the first embodiment of the present invention. figure 2 It is a schematic diagram of the process of obtaining the brittleness index of the reservoir to be tested in the method for evaluating the sweetness of tight reservoirs provided in the first embodiment of the present invention. image 3 It is a schematic diagram of the process of obtaining the natural fracture density of the reservoir to be tested in the method for evaluating the sweetness of tight reservoirs provided in the first embodiment of the present invention. Figure 4 It is a schematic flow chart of determining the sweetness of the reservoir to be tested in the method for evaluating the sweetness of tight reservoirs provided in the first embodiment of the present invention.

[0029] Such as Figure 1-Figure 4 As shown, Embodiment 1 of the present invention provides a method for evaluating the sweetn...

Embodiment 2

[0124] In addition, Figure 5 It is a schematic diagram of the structure of a device for evaluating sweetness of tight reservoirs provided in the second embodiment of the present invention. Such as Figure 5 As shown, the tight reservoir sweetness evaluation device 50 provided in the second embodiment of the present invention includes:

[0125] The first analysis module 51 obtains the effective thickness, gas saturation, effective porosity, and permeability of the reservoir to be tested based on the logging data of multiple wells to be logged, and multiple wells to be logged are opened in the reservoir to be tested .

[0126] It should be noted that multiple wells to be logged are opened in the reservoir to be tested, and logging data is obtained through logging. The effective thickness, gas saturation, effective porosity, and permeability of the reservoir to be tested can be measured through logging. The information is obtained directly. By selecting the effective thickness, gas...

Embodiment 3

[0137] In addition, Image 6 It is a schematic diagram of the structure of a device for evaluating sweetness of tight reservoirs provided in the third embodiment of the present invention. Such as Image 6 As shown, the tight reservoir sweetness evaluation device 60 provided in the third embodiment of the present invention includes:

[0138] The memory 61 is used to store instructions; specifically, the storage objects of the memory 61 include software and modules. The processor 62 is configured to run the instructions stored in the memory 61 to execute the method for evaluating the sweetness of the dense reservoir provided in the first embodiment. The processor 62 executes various functions and processing data of the compact reservoir sweetness evaluation device 60 by running or executing software programs and / or modules stored in the memory 61 and calling data stored in the memory 61.

[0139] Specifically, the processor 62 is used to obtain the effective thickness, gas saturatio...

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Abstract

The invention provides a tight reservoir sweetness evaluation method and device. The tight reservoir sweetness evaluation method includes the steps that according to logging information of multiple wells to be detected, the effective thickness, gas saturation, effective porosity and permeability of a reservoir to be detected are acquired, wherein the wells to be detected are formed in the reservoir to be detected; according to the logging information of the wells to be detected, the brittleness index, natural fracture density and mud content of the reservoir to be detected are acquired; the correlation degree of the effective thickness, gas saturation, effective porosity, permeability, brittleness index, natural fracture density and mud content of the reservoir to be detected is acquired; according to the correlation degree, the weight coefficients of the effective thickness, the gas saturation, the effective porosity, the permeability, the brittleness index, the natural fracture density and the mud content are acquired; according to the weight coefficients, the sweetness of the reservoir to be detected is determined. By means of the tight reservoir sweetness evaluation method and device, the geological characteristics of the tight reservoir can be comprehensively analyzed, and the accuracy of tight reservoir sweetness evaluation can be improved.

Description

Technical field [0001] The invention relates to the technical field of exploration and development of tight reservoir gas reservoirs, in particular to a method and device for evaluating the sweetness of tight reservoirs. Background technique [0002] Tight gas reservoirs refer to gas reservoirs with low porosity, permeability and gas saturation, but high water saturation, and can obtain industrial natural gas production. The development effect of tight gas reservoirs is related to traditional geological sweet spots and engineering sweet spots, and also related to the degree of damage during the fracturing process. How to combine geological sweet spots, engineering sweet spots, and reservoir damage levels to evaluate tight gas reservoirs The sweetness of Tibet is one of the concerns of many scholars in the field of petroleum geology. [0003] In the current sweetness evaluation method for tight gas reservoirs, the compressibility evaluation index of geological sweets, the compressi...

Claims

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Application Information

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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 申颍浩史鹏朱兆鹏王剑波陈浩张衍君
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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