A method for evaluating the development potential of shale gas blocks based on relative preference index

Abstract

The invention discloses a method for evaluating the development potential of a shale gas block based on a relative preference index. The method includes collecting enrichment accumulation and development elements of a shale gas research block, collecting basic data, and establishing a control factor relationship flow diagram; Obtain the influence distribution of the control factors; establish the evaluation factor vector; calculate the proportion distribution of the evaluation factors; respectively calculate the distribution of the pros and cons of the comparison blocks under each evaluation factor; respectively calculate the pros and cons of the comparison blocks under each evaluation factor are reliable The relative preference index COI is calculated; the present invention establishes a relative evaluation theory system of dynamic calculation, calculates the relative preference index COI with the collective difference of multiple control factors, and comprehensively evaluates the selected area through the COI numerical value, which is different for different geological backgrounds, different The comparison of blocks and different exploration degrees provides a unified method, and also takes into account the possibility of shale gas enrichment and accumulation and developability, providing a more reliable solution for the comprehensive evaluation of shale gas preferred areas.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for evaluating the development potential of shale gas blocks based on a relative preference index. It is suitable for the evaluation of the exploration and development potential of shale gas blocks, especially for the comprehensive evaluation of favorable areas in mature shale gas exploration areas. Background technique [0002] In recent years, the development of shale gas is considered to be a revolution in the global energy field, which can not only greatly improve the national energy self-sufficiency rate, but also change the national energy consumption structure. In view of the increasingly important status of shale gas, in order to achieve a more accurate assessment of the potential of shale gas blocks, in recent years in geology, geophysical prospecting and other related disciplines, a number of new technologies and methods in profe...

AI Technical Summary

Problems solved by technology

[0008] 1. The work of selecting the main control factors is too dependent on experience and has strong subjectivity

[0009] 2. After multiple controlling factors are selected, the relationship between the controlling factors is quite complicated, interacting with each other and cannot be ruled out individually

[0010] 3. There is no clear functional relationship between most of the factors that can be described

[0012] 5. In the comparative analysis of the main controlling factors in historical data, it is easy to fall into comparative analysis of factors with large differences, rather than systematic and overall research

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