基于测井信息的煤层气有利区多层次模糊综合评价模型——以寿阳区块为例

Multi-level fuzzy comprehensive evaluation model for favorable coalbed methane development area based on logging information: a case of Shouyang block

  • 摘要: 为克服煤层气有利区评价中参数难以取全、取准的问题,综合利用测井信息与测试数据,建立了一个由2个二级评价参数(资源条件和开发条件)、8个三级评价参数和2个四级评价参数构成的多层次模糊评价模型。通过该模型,利用测井信息拟合预测各项评价参数,对山西寿阳地区3号、9号和15号煤层气单采与合采下有利区进行了评价。研究发现单层开发时,3号煤层整体较有利,9号煤层较为不利,15号煤层适中;合层开发时,(3+15)号煤层合采最为有利,而(3+9)号煤层合采最为不利。不论单采还是合采,该区煤层气勘探开发有利区集中在北部,这与目前该区近1年的试采现状吻合。

     

    Abstract: In order to overcome the problem that the evaluation parameters are difficult to be systematically and precisely measured, a multi-level fuzzy comprehensive evaluation model for favorable coalbed methane (CBM) development area which includes 2 second-level factors (resource condition and developmental condition), 8 third-level factors and 2 fourth-level factors is established based on logging information in this study. By utilizing this model, the evaluation parameters are fitted and then predicted by logging information and then CBM in NO.3, NO.9 and NO.15 coals with single-layer or commingling production is evaluated in Shouyang block. Research shows that CBM in NO.3 coal is more favorable, NO.9 less favorable and NO.15 moderate in single-layer production and CBM in NO.(3 and 15) coal is the most favorable, NO.(3 and 9) the least favorable in commingling production. Whatever single-layer or commingling production, the favorable area is distributed in the north part of this block, which coincide with the 1-year production status.

     

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