裸眼洞穴井在山西保德煤层气区块的实验和应用

Experimentation and Application of Open-Hole Cavity Completion in Baode CBM Block

裸眼洞穴完井是煤层气井所特有的完井方式,在一些区块的产气量是套管压裂完井产气量的数倍。裸眼洞穴完井的机理是在作业过程中产生了数条各向延伸的自支撑裂缝,实现井筒与储层有效地连通。根据保德地区的实际完井经验,对裸眼洞穴完井工艺进行实践总结,探索洞穴井在该地区的适用性,为下一步煤层气开发井型选择提供了依据。

The open-hole cavity completion is a peculiar mode in CBM well completion. In some blocks, the gas yield from these wells is several times of those from casing fracturing completed wells. The mechanism of open-hole cavity completion is a couple of all-direc- tionally extended self-supporting fractures formed during operations, thus achieved effectively connecting well and reservoir. Based on practical well completion experiences in the Baode area, summarized open-hole cavity completion technology, explored the method ap- plicability in the area, and provided basis for well type selection in CBM exploitation henceforth.