楚28平1井固井技术  

Cementing technology in horizontal well Chu28 H-1

作　　者：范先祥[1] 钟福海[1] 宋振泽[1] 宋元洪[1] 王野[2] 邓艳华[2] 刘顺良[3] 王东明[3] 

机构地区：[1]华北石油管理局固井工程技术处 [2]华北石油管理局钻井工艺研究院 [3]华北油田分公司钻井管理中心

出　　处：《钻井液与完井液》2005年第2期62-64,共3页Drilling Fluid & Completion Fluid

摘　　要：楚28平1井原设计为水平井,由于地层原因提前完钻,成为大斜度定向井。完钻井深为2990 m,最大井斜角为85.01°,井底水平位移为390.33 m。针对大斜度定向井固井的难点,优选了G级水泥加入10%微硅作为基础材料,再加入适量的降失水剂、减阻剂、早强剂和膨胀剂等组成水泥浆体系。该水泥浆体系失水量小于50mL,游离液为0,水泥浆的密度差甚微,稳定性能好,且稠化过渡时间短,防窜性能优良。同时,在施工过程中,优化了钻井液性能,提高了套管居中度,采用驱油型冲洗液和套管漂浮等技术,提高了水泥浆的顶替效率和水泥环的封隔效果,保证了大斜度井的固井质量。Chu28 H-1 well was originally designed as a horizontal well, however it was drilled as a high-inclination directional well by reason of geological limitation. Its TD is 2990 m, the maximum deviation angle is 85.01 and the horizontal displacement is 390.33 m. Based on the difficulties of cementing a high-inclination directional well, a cement slurry formulation including G class cement, microsilicon and other additives such as fluid loss additive, drag reducer, early strength agent and swelling agent was optimized. The fluid loss of the slurry is less than 50 mL, the free water is 0 mL, the density difference is minor, the property is stable, the transit time is short and the anti-channeling ability is strong. In addition, measures such as optimizing the drilling fluid property, trying to place the casings in middle line, using oil displacing flushing fluid and casing floatation technique were taken. As a result, the slurry displacement efficiency was increased, the isolation of cement sheath was effective, and the cementing quality was guaranteed.

关 键 词：大斜度定向井 水泥浆体系 固井技术 顶替效率 减阻剂 降失水剂 井底 稠化 地层 井深 

分 类 号：TE256[石油与天然气工程—油气井工程] TE933