束鹿荆丘构造膏盐层双层套管固井技术与应用

DOUBLE CASING CEMENTING IN GYPSUM SALT LAYER OF SHULUJINGQIU STRUCTURE

针对束鹿荆丘构造带因膏盐层蠕变、套管挤毁油井报废问题,经过研究与实践,使用双层套管固井技术较好地解决因膏盐层蠕变造成的挤毁套管难题.通过对冲洗隔离液、水泥浆体系研究,采用层流顶替技术保证水泥环的完整性,实现全封固段良好封固,确保施工安全及固井质量,为后期开采创造有利的条件.

In view of the problems of gypsum-salt formation creeping and casing collapse at Shulu Jingqiu structural belt,through research and practice,double-layer casing cementing has been used to solve the casing collapse caused by gypsum creeping.Through the study on flushing space fluid and cement slurry systems,laminar displacement is adopted to ensure the integrity of cement sheath,achieve good sealing along the whole cementing section,ensure the operation safety and cementing quality,and create favorable conditions for the later operations.