地层流体侵入条件下泡沫钻井流动特性分析  

An Analysis on Flow Characteristics of Foam Drilling under Formation Fluid Intrusion Conditions

作　　者：孙士慧[1] 徐文 冯金禹 唐海燕[2] SUN Shihui;XU Wen;FENG Jinyu;TANG Haiyan(College of Petroleum Engineering,Northeast Petroleum University,Daqing Heilongjiang 163318,China;The Second Oil Production Plant,Daqing Oilfield Company,Daqing,Heilongjiang 163511,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]大庆油田有限责任公司第二采油厂,黑龙江大庆163511

出　　处：《中国锰业》2019年第6期42-47,共6页China Manganese Industry

基　　金：黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT-2017032)

摘　　要：基于计算流体力学和多相流的相关理论与研究方法,建立了泡沫钻井环空流动模型,通过数值求解,分析了地层产水、产气条件下,泡沫稳定性、携岩能力、井底压力的变化情况。研究结果表明:地层水、地层气侵入井筒,对泡沫稳定性、携岩能力、井底压力的影响显著,在钻井作业过程中,可通过合理的设计注液量、注气量和井口回压来减弱甚至消除地层水和地层气体侵入的影响。Based on the relevant theories and research methods of computational fluid dynamics and multiphase flow,this paper establishes a flow model of foam drilling. Through numerical solution,we know that foam stability,cuttings transport capacity and bottom hole are analyzed under the conditions of different formation water in production rates and gas production rates. The research results show that formation water and formation gas intrusion into the wellbore have significant effects on foam stability,cuttings transport capacity and bottomhole pressure. During drilling operation,reasonable design of liquid injection volume, gas injection volume and wellhead back pressure can be used to eliminate the effects of formation water and formation gas intrusion.

关 键 词：流体侵入 泡沫钻井 携岩能力 泡沫稳定性 井底压力 

分 类 号：TE242[石油与天然气工程—油气井工程]