摘要
为有效预测古县区块煤层气富集有利区,基于煤层气封存单元的地质理念,讨论了煤层气封存单元边界构成要素的识别参数,提出了基于单元边界要素二分的煤层气封存单元分类与评价方法。在地震地质综合解释成果的基础上,从构造、沉积、岩性、水文和物性5个方面,对研究区太原组9+10号煤层进行了煤层气封存单元边界识别及单元分类,共解释5个大类、22个小类、43个煤层气封存单元。基于单元构成地质要素对煤层气富集的影响,将识别出的单元划分为煤层气富集有利、较有利、较不利和不利4类。经已有煤田钻井瓦斯含量数据及新实施的5口探井煤层气含量测试成果验证,表明了该方法的有效性及合理性。
In order to effectively predict the favorable area of CBM enrichment in the Guxian block,this paper discusses the identification parameters of the boundary elements of the coal-bed methane storage unit from the geological concept of the CBM storage unit,classification and evaluation method of coal-bed methane storage unit based on binary elements of element boundary is proposed.On the basis of comprehensive interpretation of seismic geology,the CBM storage units were identified and classified by aspects of structure,sedimentary,lithology,hydrology and physical properties.A total of 5 categories,22 small categories,and 43 CBM storage units were given.The identified units were divided into coal-bed methane enrichment,favorable,relatively unfavorable and unfavorable based on the influence of geological elements on coal-bed methane enrichment.The gas content data of the existing coal mine drilling and the test results of coal-bed methane of 5 newly implemented exploration wells demonstrates the method is effective and reasonable.
引文
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