气井压裂完井一体化用封隔器胶筒关键技术研究  

Research on key technology of packer rubber cylinder for gas well fracturing and completion integration

作　　者：蔡萌[1,2] 王鹏 马文海[1,2] 李俊亮 刘照义[3] 黄伟明 CAI Meng;WANG Peng;MA Wenhai;LI Junliang;LIU Zhaoyi;HUANG Weiming(Oil Production Engineering Research Insititute,Daqing Oilfield Company Limited,CNPC,Daqing 163453,Heilongjiang;Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation,Daqing 163453,Heilongjiang;Key Laboratory of Enhanced Oil and Gas Recovery,Ministry of Education(Northeast Petroleum University),Daqing 163318,Heilongjiang)

机构地区：[1]中国石油大庆油田有限责任公司采油工程研究院,黑龙江大庆163453 [2]黑龙江省油气藏增产增注重点实验室,黑龙江大庆163453 [3]提高油气采收率教育部重点实验室(东北石油大学),黑龙江大庆163318

出　　处：《长江大学学报（自然科学版）》2023年第2期60-68,83,共10页Journal of Yangtze University(Natural Science Edition)

基　　金：中国石油重大科技专项“松辽盆地(大庆、吉林)CCUS技术集成与工业化试验”(2021ZZ01-08);国家自然科学基金项目“地层岩石对钻头磨损机理及研磨性评价标准研究”(51874098)。

摘　　要：为满足大庆深层气井压裂完井一体化工艺技术要求,压裂完井一体化用封隔器胶筒需满足耐温150℃、承压70 MPa,长期密封油套环空要求。优选“全氟醚+纳米材料”橡胶材质,应用Yeoh模型表征封隔器胶筒大应变本构特征,采用室内实验建立胶筒试件拉伸应力应变曲线,并求解封隔器胶筒材料参数。通过建立封隔器胶筒、隔环、保护伞、套管有限元计算模型,分析封隔器坐封工况下各胶筒受力变形,优化胶筒边部保护结构,即最优倒角30°。根据坐封计算结果,获得了胶筒坐封载荷与接触总应力关系曲线、坐封载荷与压缩距关系曲线,为封隔器胶筒结构设计提供依据。现场应用表明,封隔器胶筒能达到耐温154℃、承高压79 MPa、有效密封油套环空4年以上的技术指标。封隔器胶筒成功应用,提高了压裂完井一体化工艺可靠性,节约了作业成本。In order to meet the technical requirements of fracturing and completion integration in Daqing deep gas wells,the packer rubber cylinder for fracturing and completion integration should meet the requirements of 150℃temperature resistance,70 MPa pressure bearing and long-term sealing of oil jacket annulus.In this paper,the rubber material of“perfluoroether+nanomaterial”was optimized,and the Yeoh model was used to characterize the large strain constitutive characteristics of packer rubber cylinder.The tensile stress-strain curve of the rubber cylinder specimen was established by indoor experiments,and the material parameters of the packer rubber cylinder were calculated.Firstly,the finite element models of packer rubber cylinder,spacer ring,protective umbrella and casing were established to simulate the stress deformation of each cylinder under the packer rubber cylinder setting condition and optimize the protection structure of cylinder side,i.e.the optimal chamfer angle of 30°.By setting different setting load conditions,the relationship curves between rubber cylinder setting load and total contact stress,and the relationship curves between setting load and compression distance are obtained,which provides the basis for the structural design of packer rubber cylinder.It is verified through the field application that the packer rubber can reach the technical indexes of 154℃temperature resistance,79 MPa pressure bearing and over-four-year effective sealing of oil jacket annulus.The successful application of packer rubber can improve the reliability of fracturing and completion integration process and save operation cost.

关 键 词：压裂完井封隔器 胶筒 结构优化 模拟分析 大庆深层气 

分 类 号：TE37[石油与天然气工程—油气田开发工程]