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Fractured oil and gas reservoir quantitative evaluation method

A quantitative evaluation, oil and gas reservoir technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the inability to quantitatively evaluate fractured oil and gas reservoirs, and achieve the effect of improving evaluation efficiency and reducing risk costs.

Inactive Publication Date: 2016-11-09
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method disclosed in this patent is not suitable for the exploration and development of fractured tight low-permeability oil and gas reservoirs, and cannot quantitatively evaluate fractured oil and gas reservoirs

Method used

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  • Fractured oil and gas reservoir quantitative evaluation method
  • Fractured oil and gas reservoir quantitative evaluation method
  • Fractured oil and gas reservoir quantitative evaluation method

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Effect test

Embodiment 1

[0033] A quantitative evaluation method for fractured oil and gas reservoirs, comprising the following steps:

[0034] (1) Using core, logging and test analysis data, determine matrix pores and oil and gas enrichment rules, analyze reservoir heterogeneity, and divide reservoir units;

[0035] (2) Using logging, 3D seismic and stress-strain analysis to predict the distribution of fractures, evaluate the anisotropy of fracture permeability, and divide seepage units;

[0036] (3) Evaluate the matching relationship between matrix pores and fractures, and divide storage and seepage units;

[0037] (4) Quantitatively evaluate the contribution rate of fractures to reservoir production.

[0038] Further, step (1) uses core, well logging and test analysis data to determine matrix pores and oil and gas enrichment laws, analyze reservoir heterogeneity, and divide reservoir units into: using core, well logging and test analysis data, Obtain the distribution of reservoir matrix porosity,...

Embodiment 2

[0055] A quantitative evaluation method for fractured oil and gas reservoirs, the main points specifically include: (1) Using core, logging and test analysis data to determine matrix pores and oil and gas enrichment laws, analyze reservoir heterogeneity, and divide reservoir units (2) Using logging, 3D seismic and stress-strain analysis to predict fracture distribution, evaluate fracture permeability anisotropy, and divide seepage units; (3) Use cluster analysis to evaluate the matching relationship between matrix pores and fractures, and divide (4) Quantitatively evaluate the contribution rate of fractures to reservoir production. Specific steps are as follows:

[0056] Step 1: Determine matrix pores and oil and gas enrichment rules, analyze reservoir heterogeneity, and divide reservoir units. Using core, logging and test analysis data, through the analysis of rock physical properties and pore structure characteristics of the reservoir matrix system, a logging interpretation...

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Abstract

The invention relates to a fractured oil and gas reservoir quantitative evaluation method. The method comprises the following steps of (1) determining a matrix pore and oil gas enrichment law, analyzing the non-homogeneity of a reservoir, and dividing a reservoir unit; (2) predicting a fracture distribution law, evaluating fracture permeability anisotropy, and dividing a seepage flow unit; (3) evaluating a matrix pore and fracture matching relationship, and dividing a reservoir permeator unit; and (4) quantitatively evaluating a contribution rate of the fracture for the oil reservoir yield. According to the fractured oil and gas reservoir quantitative evaluation method, the non-homogeneity of a reservoir matrix pore system (a main reservoir space of oil gas), the non-homogeneity of a fracture system (a main seepage flow channel of the oil gas) and the matching relationship between the matrix pore system and the fracture system can be effectively reflected, the contribution of the fracture to the oil gas reservoir yield can be objectively evaluated, the evaluation efficiency of a complicated fractured reservoir is improved, the oil gas exploration and development of a complicated dual-porosity reservoir can be better guided, and the oil gas exploration and development risk cost of the reservoir is reduced.

Description

technical field [0001] The invention belongs to the field of oil and gas geology, and relates to a quantitative evaluation method for fractured oil and gas reservoirs. Background technique [0002] At present, the idea of ​​flow unit is used to evaluate the heterogeneity of reservoir at home and abroad. However, the flow unit can only evaluate the conventional pore-type reservoirs in which the reservoir and seepage of oil and gas are both pores. Fractured reservoirs are characterized by dual media, that is, the reservoir of oil and gas is mainly in the matrix pore system, and the seepage of oil and gas is mainly in the fracture system. The matching relationship between the two heterogeneous systems of matrix pores and fractures determines the Tibetan development effect is good or bad. Therefore, the current flow unit evaluation methods cannot meet the needs of exploration and development of fractured tight low-permeability oil and gas reservoirs. How to invent a quantitat...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 曾联波刘国平吕文雅
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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