Shale gas block development potential evaluation method based on relative optimal index

Abstract

The invention discloses a shale gas block development potential evaluation method based on a relative optimal index. The method comprises the steps of collecting enrichment accumulation and development essential factor of a shale gas researching block, collecting basic data; establishing a control factor relation flow chart; calculating influence distribution of control factors; establishing an evaluation factor vector; calculating evaluation factor weight distribution; respectively calculating advantage and disadvantage distribution of a comparing block in each evaluation factor; respectivelycalculating advantage and disadvantage reliability distribution of the computing block in each evaluation factor; and calculating the relative optimal index (COI). According to the method of the invention, a dynamic calculating relative evaluation theory system is established; a group difference among multiple control factors is used for calculating the relative optimal index (COI); comprehensiveevaluation is performed on a selected area; a uniform method is supplied for comparison of different geological backgrounds, different blocks and different exploitation degrees; furthermore shale gasenriched accumulation possibility and developing ability are considered; and a more reliable settlement solution is supplied for shale gas optimal area comprehensive evaluation.

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

Images