乐东A区块高温高压井漏失问题及井壁强化技术研究  

Leak-Off and Wellbore Strengthening Technology of High Temperature and High Pressure Well in Ledong Block

作　　者：黄静 马帅 李文拓 刘贤玉 邓文彪 HUANG Jing;MA Shuai;LI Wentuo;LIU Xianyu;DENG Wenbiao(Zhanjiang Branch of CNOOC,Zhanjiang Guangdong 524057,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司

出　　处：《重庆科技学院学报（自然科学版）》2019年第6期51-55,69,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项“莺琼盆地高温高压天然气富集规律与勘探开发关键技术(三期)”(2016ZX05024-005);中国海洋石油总公司“十三五”科技重大项目“莺琼盆地高温高压钻井关键技术研究”(CNOOC-KJ135ZDXM24LTDZJ01)

摘　　要：应用岩石力学及渗流力学理论,建立了高温高压井不同漏失类型下的漏失压力计算模型,形成了有关漏失类型识别、漏失层位确定的漏失机理综合分析技术。结合乐东A区块的地质特征,揭示了其漏失特点及规律。通过室内评价实验,优选出CoSeal通用型堵漏体系。该体系在高温下具有较好的稳定性,可在不同尺寸裂缝内快速形成高抗压强度、高剪切强度的屏障。乐东A区块现场应用表明,漏失压力及漏失层位理论分析结果与实际情况吻合,CoSeal通用型堵漏体系的堵漏效果良好。Based on the theory of rock mechanics and seepage mechanics,the calculation model of leak-off pressure under different leak-off types of high temperature and high pressure wells is established,and the comprehensive analysis technology of leak-off mechanism for leak-off type identification and leak-off position determination is formed.Combined with the geological characteristics of Ledong A block,the characteristics and laws of leak-off are revealed.The CoSeal universal plugging system is optimized by indoor evaluation experiment.The system has good stability at high temperature and can quickly form a barrier with high compressive strength and high shear strength in cracks of different sizes.Field application shows that theoretical analysis of leak-off pressure and leak-off position is consistent with the actual situation.CoSeal universal plugging system has good plugging effect.

关 键 词：高温高压井 漏失压力 漏失类型 堵漏 承压能力 

分 类 号：TE358[石油与天然气工程—油气田开发工程]