School of Geology and Environment,Xi'an University of Science and Technology Beijing Oriorn Energy Technology and Services Company Limited

从储层压力、水动力条件、含气性3个方面综合分析了黔西水公河向斜晚二叠世含煤地层流体能量的垂向分布特点,发现3个含煤段由于沉积环境不同,导致其间流体能量差异显著,中段能量条件最好、上段次之、下段最差,3段分别构成3个独立的含煤层气系统,相互间缺乏流体联系。依此将含煤地层划分为上、中、下3个开发层段,煤层气有序开发模式为由上至下依次对3个开发层段进行分阶段下行式开发。本区具备进行煤层气地面开发的工程地质条件,应以直井多层压裂合层排采技术为主,5-3、6-3、8号煤可尝试水平井技术,丛式井技术具有较好的推广前景。

From the reservoir pressure water dynanic condition and gas beaing aspects ,a comprehensive analysis was conducted on the vertical distrbution features of th lauid energy in Shuigonghe syneline Late Pemian coal beaing strata of Wlest Guiznou Due to the sedimentary environment dferences,three coal bearing sections had ohviou diffrental n the liquid energy The energy condtion at thecentral secion was best the top secion was second and the bottom section was poor.The the secions formed thee independent coabed methane beaing systems and there wa lack of the interaction lcuid connecton.Thus the coal bearing stratum wasdivided into the top.,midtle and boton development sectons and the sequence development mode of the calbed methane from the top to the bottonm in sequence wasaplied to the thee develogment sections with the sectional downward development.The area had the engineering geological conitions for the coalbed nethane surace development and the mutit stata fracturing combined nining fechnology with the verical wells would be based. The horizontal well echnology could be applied to N0.5-3seam,No.6-3seam and No.8 seam and the cluster well technology would have a good promotion prospect.

国家科技重大专项资助项目(2011ZX05034)；国家自然科学基金重点资助项目(40730422)；