中国煤层气选区评价标准探讨

Criteria for the evaluation of coalbed methane area selection in China

煤层气选区评价关系到勘探的成功与否,是煤层气勘探研究最基础的工作。近年国内外煤层气成藏理论、开发技术的快速发展,使得低煤阶气藏、连续薄层气藏、高煤阶低渗气藏等都获得成功开发,大大拓宽了煤层气的开发领域。此前国内在中煤阶成藏优势论基础上建立的选区标准已不适合当前的要求。根据当前存在的问题,结合煤层气成藏类型、地质特点和技术现状,对中国煤层气勘探选区评价标准进行了研究,试图建立一套煤层气选区评价标准,以期对国内煤层气选区评价工作提供借鉴。

The evaluation of coalbed methane area selection affects the exploration result and it is the basic work in coalbed methane exploration. In recent years, the rapid development of the coalbed methane accumulation theory and exploitation technology have led to the successful development of low-rank coalbed methane accumulations, continuous thin-layer methane accumulations and high-rank, low-permeability coalbed methane accumulations, which has greatly widened the coalbed methane development scope. The criteria for coalbed methane area selection criteria established in China based on the superiority of medium-rank coalbed methane accumulation are not suited to the present evaluation of area selection. According to the existing problems, combined with the types of coalbed methane accumulations, geological characteristics and technology status, the evaluation criteria of China＇s coalbed methane exploration area selection are studied in an attempt to establish a set of evaluation criteria for coalbed methane area selection. These can be used as reference for coalbed methane area selection.