深水深层高温高压裂缝性呼吸效应动态响应特征  

The Dynamic Response Characteristics of Ballooning Effect in Deep Fractured High Temperature High Pressure Formations in Deep Water Drilling

作　　者：吴艳辉 黄洪林 罗鸣 李文拓 马传华 代锐 李军[3,4] WU Yanhui;HUANG Honglin;LUO Ming;LI Wentuo;MA Chuanhua;DAI Rui;LI Jun(Engineering and Technical Operations Center,Hainan Branch,CNOOC(China)Co.,Ltd.,Haikou,Hainan 570100;Key Laboratory of Deep Sea Deep Formation Energy Engineering of Hainan Province,Haikou,Hainan 570100;College of Petroleum Engineering,China University of Petroleum(Beijing),Changping,Beijing 102249;China University of Petroleum-Beijing at Karamay,Karamay,Xinjiang 834000)

机构地区：[1]中海石油(中国)有限公司海南分公司工程技术作业中心,海口570100 [2]海南省深海深层能源工程重点实验室,海口570100 [3]中国石油大学(北京)石油工程学院,北京102249 [4]中国石油大学(北京)克拉玛依校区,新疆克拉玛依834000

出　　处：《钻井液与完井液》2025年第2期167-179,共13页Drilling Fluid & Completion Fluid

基　　金：中海油“十四五”重大科技项目2下属课题1“深水超深水复杂井安全高效钻完井关键技术”(KJGG2022-0201);国家重大科研仪器研制项目“钻井复杂工况井下实时智能识别系统研制”(52227804)。

摘　　要：在深水深层,裂缝/裂隙较为发育,钻井过程中井筒压力的波动易诱发呼吸效应。同时,高温高压环境使得呼吸效应更加复杂。研究深水深层高温高压裂缝性呼吸效应动态响应,对加强井筒压力的控制、保证钻井安全具有重要意义。对此,本文考虑高温高压环境,构建井筒-裂缝-地层系统的温-压耦合模型,分析呼吸效应的动态响应及其影响因素。研究结果表明,在高温、低排量条件下,呼吸效应会受到一定程度的抑制。提高钻井液动切力、降低比热容有利于减少钻井液漏失;钻井液塑性黏度对呼吸效果影响显著,且存在临界值使得钻井液漏失量最低。在变形能力强的长裂缝地层中钻井时,发生呼吸效应的概率更高;同时,小缝宽裂缝地层或许会诱发更严重的呼吸效应。研究成果为裂缝性呼吸效应的预防和控制提供理论支持。Deep formations in deep water area are developed with fractures and fissures,fluctuations in wellbore pressure during drilling can easily induce ballooning effect which is made complex by the high temperature high pressure(HTHP)downhole environment.Studies on the ballooning effect of fractures in HTHP deep formations in deep water area are important to the control of borehole pressure and the safety of drilling operation.Based on this idea,a temperature-pressure coupling model for HTHP boreholefracture-formation system is constructed and used to analyze the dynamic response and affecting factors of the ballooning effect.The results of the study show that at high temperatures and low flowrates,the ballooning effect is to some extent inhibited.Increasing the yield point and decreasing the specific heat capacity of a drilling fluid are both beneficial to reducing the amount of the drilling fluid lost.The plastic viscosity of the drilling fluid significantly affects the ballooning effect,and a critical plastic viscosity can be determined at which the amount of the drilling fluid lost is minimum.When drilling in formations with long fractures which have strong deformable capacities,the probability of encountering ballooning effect is higher.Meanwhile,when drilling in formations with small and wide fractures,more severe ballooning effect may be induced.The research results can be used as a theoretical support to the prevention and control of ballooning effect in fractured formation drilling.

关 键 词：深水高温高压 裂缝呼吸效应 动态响应 钻井液漏失与返排 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]