红河油田低压易漏地层水平段固井技术

Horizontal Well Cementing Technology for Low Pressure and Leakage Formation in Honghe Oilfield

摘要:

为提高红河油田水平井固井质量，满足后期分段压裂需求，对红河油田水平井固井技术进行了研究。针对红河油田水平段固井技术难点，通过室内和现场试验，优选出了GSJ水泥浆体系，基于实测地层压力与地层破裂压力，进行平衡压力固井设计确定了环空浆体结构，为提高顶替效率，优化了扶正器类型与加放位置，专业软件模拟表明套管居中度＞73%，良好的井眼准备和套管漂浮措施确保了管柱的顺利下入；加长胶塞、树脂滚轮刚性旋流扶正器和关井阀等附件的使用，保证了固井质量。现场应用53口水平井，水泥浆全部返至地面，CBL测井结果表明，固井优良率达81.13%。该固井技术成功应用于红河油田水平井中，保证了固井质量，满足了后期分段压裂的需要。

Abstract:

In order to improve horizontal well cementing quality in Honghe oilfield and meet the requirements of later staged fracturing, the horizontal well cementing technology in Honghe oilfield is studied. In view of the difficulties in horizontal section cementing, GSJ cement slurry system is selected through laboratory and field tests. Based on the measured formation pressure and formation rupture pressure, the balanced pressure cementing design is used to determine the annulus structure of slurry. In order to improve the displacement efficiency, the stabilizer type and placement location are optimized. The professional software simulation indicates that the centralized degree is more than 73%. High-quality well bore preparation and casing floating measure ensure smooth casing strings running down; the use of lengthened rubber plug, resin wheel rigid cyclone centralizer, shut-in valve and other accessories ensure the cementing quality. In the actual application in 53 horizontal wells, cement slurry all returned to the ground. CBL logging show that superior rate of cementing reaches 81.13%. This cementing technology is successfully applied in the horizontal wells in Honghe oilfield, which guarantees the cementing quality and meets the needs of later staged fracturing.