Clastic rock reservoir grading evaluation method

Abstract

The invention discloses a clastic rock reservoir grading evaluation method, and relates to the technical field of reservoir grading evaluation. The problem that a unified reservoir grading evaluation standard does not exist is solved. The clastic rock reservoir grading evaluation method comprises the following steps that each specific parameter for controlling the reservoir quality is summarized and concluded into four factors, namely a material source factor, a deposition factor, a diagenesis factor and a formation pressure factor; and then grading evaluation is carried out on the reservoir in a research area based on the material source factor, the deposition factor, the diagenesis factor and the formation pressure factor. The reservoir quality control parameters can be comprehensively reflected, reservoir grading evaluation standards can be unified, the unified reservoir grading evaluation standards are adopted to perform grading evaluation on reservoirs, and the clastic rock reservoir grading evaluation method can be applied to exploration and development work of petroliferous basins. The clastic rock reservoir grading evaluation method is used for performing clastic rock reservoir grading evaluation.

Description

technical field [0001] The invention relates to the technical field of graded evaluation of reservoirs, in particular to a method for graded evaluation of clastic rock reservoirs. Background technique [0002] At present, conventional oil and gas exploration is far from meeting domestic production needs. As my country's dependence on foreign oil increases year by year, my country's oil and gas exploration is gradually advancing to unconventional fields. The discovery of oil and gas in tight clastic rock reservoirs with low porosity and permeability will effectively alleviate the shortage of oil and gas reserves in my country. As a clastic rock reservoir for storing oil and gas, its quality determines the resource potential of the oil-gas-bearing basin. Therefore, the comprehensive evaluation of the clastic rock reservoir in the oil-gas-bearing basin has become an important factor restricting oil and gas exploration and the focus of scholars' research. and difficult. [000...

AI Technical Summary

Problems solved by technology

[0004] Scholars at home and abroad have conducted a large number of reservoir classification and evaluation work on conventional and unconventional clastic rock reservoirs, and established reservoir classification evaluation standards for different research areas , but it has the following defects and deficiencies: the lack of summarization of reservoir quality control factors, the selection of evaluation parameters are different, and there is no unified reservoir classification evaluation standard, resulting in different classification evaluation results in each research area, It is difficult to apply to the exploration and development of oil and gas basins

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