塔北YK5井超深井尾管固井水泥浆技术
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摘要
YK5井位于塔里木盆地塔北隆起轮南低凸起东翼,是一口井深为7 044. 5 m的超深探井。三开尾管固井封固4 500~7 044. 5 m,井底高温高压、封固段长、多套压力层系、封固段复合井眼及水泥浆受钻井液污染严重等复杂情况,对三开小间隙尾管固井施工提出挑战。通过试验优选形成BCE型抗高温高耐压大温差水泥浆体系和BCS型高抗污染隔离液;应用壁面剪应力理论优化入井流体流变参数提高顶替效率,解决了技术难题,固井质量良好。形成了一套针对该地区复杂条件下的超深井小间隙尾管固井技术,有助于提高塔北地区超深井的固井质量。
Well YK5 is an ultradeep exploratory well located at Tarim basin,7044. 5 m deep. The third spud is to be liner cemented at 4500-7044. 5 m. HPHT at the hole bottom,long cementing section,multiple pressure systems,cement slurry seriously contaminated by the drilling fluid all pose challenges on this small-clearance liner cementing. By a series of tests,BCE HPHT large temperature difference slurry system is developed,as well as BCS contamination-sustainable spacer fluid. And the rheology of the incoming fluid is optimized by using wellbore shear stress theory to improve displacement efficiency,the cementing quality is improved. This small-clearance liner cementing technology for ultradeep wells under the complicated conditions in that area will help to improve the cementing quality at Tabei area.
Well YK5 is an ultradeep exploratory well located at Tarim basin,7044. 5 m deep. The third spud is to be liner cemented at 4500-7044. 5 m. HPHT at the hole bottom,long cementing section,multiple pressure systems,cement slurry seriously contaminated by the drilling fluid all pose challenges on this small-clearance liner cementing. By a series of tests,BCE HPHT large temperature difference slurry system is developed,as well as BCS contamination-sustainable spacer fluid. And the rheology of the incoming fluid is optimized by using wellbore shear stress theory to improve displacement efficiency,the cementing quality is improved. This small-clearance liner cementing technology for ultradeep wells under the complicated conditions in that area will help to improve the cementing quality at Tabei area.
引文
[1]屈建省,许树谦,郭小阳.特殊井固井技术.北京:石油工业出版社[M]. 2006:142-166.
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[6]张宏军,杨亚新,林晶.高强超低密度水泥浆体系研究[J].钻采工艺,2006,29(6):107-110.
[7]张宏军.中空玻璃微球超低密度水泥浆体系评价与应用[J].石油钻采工艺,2011,33(6):41-44.
[8]黄柏宗.紧密堆积理论优化的固井材料和工艺体系[J].钻井液与完井液,2001,18(6):1-8.
[2]杨川,石庆,袁吉祥,等.塔北地区超深井低压易漏长封固段固井技术[J].天然气技术与经济,2017,11(1):30-34.
[3]刘崇建,黄柏宗,徐同台,等.油气井注水泥理论与应用[M].北京:石油工业出版社,2001:420-426.
[4]丁保刚,王忠福.固井技术基础[M].北京:石油工业出版社. 2006:200-204.
[5]崔军,张树坤,牟忠信.微硅-漂珠复合低密度高强度水泥浆体系的研究与应用[J].石油钻探技术,2004,32(3):47-49.
[6]张宏军,杨亚新,林晶.高强超低密度水泥浆体系研究[J].钻采工艺,2006,29(6):107-110.
[7]张宏军.中空玻璃微球超低密度水泥浆体系评价与应用[J].石油钻采工艺,2011,33(6):41-44.
[8]黄柏宗.紧密堆积理论优化的固井材料和工艺体系[J].钻井液与完井液,2001,18(6):1-8.