摘要
塔里木轮南侏罗三叠系油藏经多年开发后,压力降低,成为低压渗透层,压力系数1.15～1.18,钻井液密度超过1.2 g/cm^3就会出现渗漏。完井技术套管裸眼段长,套管串与井壁间环空间隙小,循环阻力大,水泥浆密度高(平均在1.85～1.90 g/cm^3),液柱压力大,固井施工泵压高,致使水泥浆在低压渗透的储集层段漏失,从而影响了固井质量,污染了油层,给完井后井下作业造成极大的难度。因此决定在国内率先采用三级固井技术试验并获得成功。
After many years of production,Jurassic-Triassic reservoir in Lunnan of Tarimu becomes a low permeability layer with a pressure coefficient of 1.15-1.18.Leakage will happen once the drilling fluid density is more than 1.20 g/cm^3.Because of problems such as long open hole completion casing length,small gap between casing string and hole wall,large circulation resistance,high slurry density(1.85-1.90 g/cm^3 in average),big liquid column pressure,high cementing pump pressure, leakage is easy to happen in low pressure section,which affects the cementing quality,pollutes the reservoir and leaves a great difficulty to downhole operation after the completion.Therefore,the development industry became the first domestic in using triple cementing technique and achieved success.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2009年第S2期27-28,31,共3页
Oil Drilling & Production Technology
关键词
塔里木
水平井
三级固井
技术
Tarim
horizontal well
triple cementing
technique
