卡拉赞巴斯油田浅层调整井防窜固井技术  

Anti-channeling cementing technology for shallow adjustment wells in Karazhanbas Oilfield

作　　者：韦庭丛 郭小阳[2] 程小伟[1] 辜涛[2] 王升正[1] 杨雨佳[1] 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500 [2]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《石油钻采工艺》2015年第5期49-53,共5页Oil Drilling & Production Technology

基　　金：高等学校博士学科点专项科研基金"硅酸盐-磷铝酸盐水泥水化产物与其在高酸性环境下的腐蚀行为研究"(编号:20115121120006);四川省教育厅重点科研项目"等离子改性废旧橡胶增强油井水泥石韧性机理研究"(编号:13ZA0182)

摘　　要：卡拉赞巴斯油田老区浅层调整井固井后存在声幅测井质量合格率低、环空带压严重的问题,分析其原因是由于前期水泥浆设计指导原则脱离油田实际。针对现场实际要求,通过去掉降滤失剂、减少分散剂使用、选择合理实验温度、优化外掺料配比等措施调整水泥浆配方,调整后的低温早强水泥浆体系稠化时间、终凝时间可分别控制在2 h、4 h以内,8 h强度可达3MPa以上。对调整后的水泥浆体系进行了8井次的现场应用,固井合格率由前期的69%提高到90%以上,基本上解决了该油田薄油层、薄隔层、活跃水层调整井固井难题,为油田的高效开发创造了良好条件。After cementing job in the shallow adjustment wells in matured blocks of Karazhanbas Oilfield, there existed someproblems like low acoustic amplitude logging pass rate, severe annulus pressure. Analysis shows that the reason for this is that theguidelines for design of previous cement slurry gradually deviated from the actual conditions of the oilfield. In view of the actual fieldrequirements, the cement slurry formulation was adjusted by removing the fluid loss agent, reducing the use of dispersants, choosingreasonable experimental temperature and optimizing the admixture ratio. The thickening time and initial setting time of the adjusted lowtemperature early strength cement slurry system were controlled within 2 h and 4 h respectively. If controlled within 8 h, its strengthmay be over 3 MPa. This adjusted cement slurry system was applied for the eight well times, and the cementing qualification rate wasup from 69% to over 90%, which has basically solved the difficulty in cementing of adjustment wells with thin oil layers, thin isolatinglayers, active aquifer, and has created a favorable condition for efficient development of the Oilfield.

关 键 词：固井 低温 浅层调整井 水泥浆 卡拉赞巴斯油田 

分 类 号：TE256[石油与天然气工程—油气井工程]