煤层气高效开发储层精细描述技术探索及应用

Exploration and Application of Efficient Development of Fine Description Technology in CBM

我国的煤层气资源丰富,但因储层非均质性强,导致产量差异大。以鄂尔多斯盆地某煤层气区块为例,采用测井、岩心、模糊数学、三维地质建模、生产动态资料、数值模拟等手段,形成了多约束含气量三维预测技术、多手段煤体结构预测技术、以及动静结合有利区三维预测技术。这3项关键技术开展的煤储层精细描述有别于以往的分析方法 ,研究成果得到了动态验证,较好地刻画了储层非均质性,并为煤层气井位部署、分区配产提供了地质依据,为煤层气的高效开发提供了有利支撑。

The quantity of CBM resource in China are abundant, but the heterogeneities in reservoir are strong,so the differences of yield are large. The CBM blocks in Ordos basin is taken as an example by well logging, core, fuzzy mathematics, 3D geological modeling, production performance data, numerical simulation and other means, form the multiple constraints of 3D gas content prediction technology, the more means of the coal body structure prediction technology, as well as 3D prediction technology of dynamic and static combination in the favorable area. The three key technologies of fine CBM description are different with previous analysis methods, and better depict heterogeneity in the reservoir.The research results are verified by dynamic information.The three technologies provide a good geological support for CBM well placement,production allocation of regionalization,efficient deveiopment.