煤层气井试井测试中常见问题与技术对策

煤层气井与常规油气井储层在孔隙结构、赋存状态、产出机理上完全不同,试井方法亦不相同。针对煤层气产出特征、资料录取要求,重点探讨煤层气井注入/压降试井工艺技术中常见的问题与对策,结合测试井的不同情况,优化试井方案,采取单封、双封不同管柱结构工艺技术,可有效降低井筒储集效应对测试工作的影响,现场应用效果显著,对煤层气井试井测试具有借鉴意义。

Common problems and technique strategies of CBM wells in well testing

CBM wells and conventional wells are completely different in pore structure, occurrence and output mechanism, the test-ing methods are also different. According to the output features and data acquisition demands, this paper focus on CBM wells for common problems and strategies of injection and pressure drawdown testing technology. Combined with different circumstances of test wells and with the optimal testing scheme, different string structure techniques of single packer and double packers were ap-plied to effectively reduce the influence of the effect of wellbore storage on testing. The field application with obvious effect has great refference to the CBM well testing.