水不分散水泥浆体系适应性研究与现场应用  

The Adaptability and Application of a Water Non-Dispersible Cement Slurry

作　　者：王建瑶 杨昆鹏 梅明佳 WANG Jianyao;YANG Kunpeng;MEI Mingjia(CNPC Tianjin Boxing Engineering Science&Technology Co.,Ltd.,Tianjin 300451;CNPC Key Laboratory of Drilling Engineering,Laboratory of Cementing Technology,Tianjin 300451;National Engineering Laboratory of Petroleum Drilling Technology,Tianjin 300451;CCDC Changqing Well Cementing Company,Xi’an,Shaanxi 710000)

机构地区：[1]中国石油海洋工程有限公司钻井工程研究院,天津300451 [2]中国石油钻井工程重点实验室固井技术研究室,天津300451 [3]油气钻井技术国家工程实验室固井技术研究室,天津300451 [4]中国石油川庆钻探工程有限公司长庆固井公司,西安710000

出　　处：《钻井液与完井液》2021年第4期499-503,共5页Drilling Fluid & Completion Fluid

基　　金：中国石油集团油田技术服务有限公司科学研究与技术开发项目“井筒业务新技术新方法研究与推广应用”课题“高含水压力扰动地层固井技术及防水窜新材料研究”(2020T-003-003)。

摘　　要：针对长庆油田注水区块、高含水地层固井期间和固井后水侵、水窜问题突出的情况,结合现场实际,对抗分散絮凝剂BCY-100L的现场适应性进行研究,优选了抗分散辅剂A。针对现场不同体系配套不同外加剂,形成水不分散固井液体系,该体系在水侵发生时能够保持水泥体系自身胶凝结构完整性,具有良好的遇水不分散和抗冲刷能力,施工性能良好,可阻止地层水的侵入,保障水泥浆与套管、地层的胶结质量。在长庆油田含水地层成功应用2井次,二界面固井质量合格率为100%,优质率达95%以上,其中二界面水层固井质量由28%提高至95%,水层封固效果明显提高,在注水区块和高含水地层固井具有良好的应用前景。There has long been a water invasion and channeling problem in the water injection blocks and high water cut formations in Changqing oilfield which always happened during and/or after well cementing.To deal with this problem,the field adaptability of the anti-dispersing flocculant BCY-100L was studied taking into account the conditions of field operation.A secondary anti-dispersing agent A was selected through laboratory experiment.Different water non-dispersible cement slurries can be formulated by adding different cement additives to suit different requirements of well cementing.This water non-dispersible cement slurry can maintain its gel structure integrity when water invasion occurs,having outstanding non-dispersing performance and erosion resistance when in contact with water.It is able to resist the invasion of formation water and protect the good bonding at both sides of the cement sheath.This cement slurry has been used twice in wells penetrating water bearing zones,and the pass rate of the quality of the cement sheath with the casing and the borehole wall is 100%,and the high-quality rate of the bonding was 95%.The job quality of the cementing in the water bearing section was increased from 28%to 95%.Field application indicates that this cement slurry has good prospects in cementing wells in water injection area and wells penetrating water bearing formations.

关 键 词：水不分散 水泥浆 固井 抗水侵 

分 类 号：TE256.6[石油与天然气工程—油气井工程]