大庆石油地质与开发

2014, v.33;No.162(02) 170-174

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延川南煤层气藏水文地质特征与产能关系
RELATIONSHIP BETWEEN THE HYDROGEOLOGICAL CHARACTERISTICS AND PRODUCTIVITY FOR THE CBM RESERVOIRS IN SOUTH YANCHUAN

李清
LI Qing

摘要(Abstract):

通过对延川南煤层气田2号煤层开发试验井组的水离子组成、水力压头的展布特征等水文参数分析,研究了水文条件与煤层气产能的关系。水文地质特征分析表明:延川南2号煤层存在3种水动力条件,随着矿化度的整体增高,单井产能明显增大;煤层压力水头越高,产能越高;万宝山构造带更利于富集成藏,其单井产能明显高于谭坪构造带,为下步煤层气开发的有利地区。研究成果进一步验证了煤层气的保存条件是决定产能的主要因素,并为该区优选开发区块、实现高效开发提供了地质依据。
By the analyses of the hydrogeological parameters such as the ionic composition of the water,spread characteristics of the hydraulic head and so on for the development testing well group of Layer 2 in South Yanchuan CBM Gasfield,the relationship between the hydrogeological conditions and gas productivity are studied.The analyses of the hydrogeological characteristics show that there are three kinds of hydrodynamic conditions in the layer,with the whole rise of the salinity,the productivity of each well will obviously increase;the higher the hydraulic head of the eoalbed,the greater the productivity will be;Wanbaoshan Structural Belt is more favorably enriched and accumulated and moreover the productivity of each well in the belt is higher than that of Tanping Structural Belt,so it has become the favorite region for further CBM development.The research achievements further testify that the preserving conditions of the CBM are the main factor determining the productivity and moreover the results have provided the geological evidences for the optimization of the developing block and realization of the high-efficiency development for the block.

关键词(KeyWords): 煤层气;水动力;矿化度;产能;开发试验;延川南;鄂尔多斯盆地
CBM;hydrodynamics;salinity;productivity;development test;South Yanchuan;Erdos Basin

Abstract:

Keywords:

基金项目(Foundation): 中国石化重大先导科研“延川南煤层气田产气能力影响因素分析”(2012XD0102)

作者(Author): 李清
LI Qing

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