考虑气体压缩性的充气钻井井底压力计算  

Computation of Borehole Pressure Considering Gas Compressibility in Gasification Well

作　　者：毕雪亮[1] 陶丽杰[1] 阎铁[1] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318

出　　处：《西部探矿工程》2008年第3期29-31,共3页West-China Exploration Engineering

摘　　要：为了降低钻井液静液柱压力,快速有效地进行钻井施工,向钻井液注入气体是常用的方法,介绍了注入气体后井底压力计算的方法,建立了环空多相流计算模型,通过对多相流有关参数的计算,采用分段叠代的方法计算各个参数,充分考虑了气体的压缩性,从而提高了井底压力计算的精度。在此基础上进行计算机编程,计算结果表明该模型有一定的应用价值。In order to decrease the hydrostatic pressure of drilling fluid, rapidly and effectively drill. It is a common approach to inject gas into the drilling fluid. In this paper, the methods of calculating the borebole pressure are introduced and computation models of multiphase flow in annulus are established. By calculating the relative parameters about the multipbase flow, calculating all kind of variables by trial and error, sufficiently considering the compressibility of the gas, then the calculation accuracy of the bottom pressure is enhanced. Based on the theory, the computer programmed is established. The results indicate that the model can be widely used.

关 键 词：充气钻井 井底压力 压缩因子 环空多相流 直井 

分 类 号：TE242.6[石油与天然气工程—油气井工程]