摘要
针对顺北油气田凝析气藏在生产期间产生的微裂隙和微环隙,研制了适用于顺北油气田的遇气自愈合乳液,该乳液遇天然气体积膨胀率达30%,并配制出了密度范围在1.45~2.20 g/cm^(3)的自愈合水泥浆体系。该水泥浆体系的适用温度在90~180℃,弹性模量小于7 GPa。同时,还设计了合理的水泥石遇气自愈合能力评价方法,通过首次造缝和二次造缝,水泥石的自愈合能力分别达到了100%和95.1%。研制的遇气自愈合水泥浆体系兼具自愈合能力和优异的弹性性能,已现场试验3口井,固井质量优质率为100%,满足了顺北油气田高温高压气井长期密封需要。
The micro crack and micro annular gap are inevitable during the production of condensate gas reservoir in Shunbei oil&gas field,but the existing self-healing agent has low temperature resistance,and the evaluation method of self-healing ability is very different from the downhole working conditions.So it can not be applied to Shunbei oil&gas field.A self-healing emulsion in gas suitable for Shunbei oil&gas field is developed,with the volume expansion rate in gas reaches 30%.This agent can prepare self-healing cement slurry with density range of 1.45-2.20 g/cm^(3),which is suitable for 90-180℃,with low modulus of elasticity<7 GPa.At the same time,a reasonable evaluation method for the self-healing ability of cement in gas is devised.Through the first and second artificial fractures making,the self-healing ability of cement paste is 100%and 95.1%respectively.At present,the selfhealing cement slurry for gas has been tested in 3 wells,and the high quality rate of cementing quality is 100%,which meets the needs of long-term sealing of HTHP gas wells in Shunbei oil&gas field.
作者
赫英状
步玉环
柳华杰
HE Yingzhuang;BU Yuhuan;LIU Huajie(School of Petroleum Engineering in China University of Petroleum(East China),Qingdao,Shandong 266580;Petroleum Engineering Technology Research Institute,Northwest Oilfield Company,Sinopec,Urumqi,Xinjiang 830011;Key Laboratory of Enhanced Recovery for Fracture-cave Oil Reservoir,Sinopec,Urumqi,Xinjiang 830011)
出处
《钻井液与完井液》
CAS
北大核心
2022年第6期743-747,共5页
Drilling Fluid & Completion Fluid
基金
中国石化重点科技项目群“顺北特深层断裂破碎带区块安全成井关键技术”(PE19004)
关键词
固井
自愈合水泥浆
天然气
顺北油气田
微裂隙
Cementing
Self-healing cement slurry
Gas
Shunbei oil&gas field
Evaluation method for the self-healing ability
作者简介
第一作者:赫英状,1988年生,在读研究生,现在主要从事固井水泥浆体系与固井工艺研究。电话18160698843,E-mail:heyz.xbsj@sinopec.com
