油基增黏剂的研制及在榆林气田下古水平井的应用

杨勇平; 贾彦强; 孙欢; 严胜飞

doi:10.3969/j.issn.1001-5620.2015.06.004

油基增黏剂的研制及在榆林气田下古水平井的应用

doi: 10.3969/j.issn.1001-5620.2015.06.004

中国石油川庆钻探长庆钻井总公司, 西安

详细信息

作者简介:
杨勇平,1981年生,毕业于重庆石油科技学院石油工程专业,主管长庆钻井总公司第五项目部钻井技术。地址:陕西省咸阳市秦都区人民路街道嘉惠南门陕中附院安定路院区李赞;邮政编码712000;电话13571155584;E-mail:502270772@qq.com。

中图分类号: TE254.3
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出版历程
- 收稿日期: 2015-07-28
- 刊出日期: 2015-11-30

Oil Base Drilling Fluid Technology for Horizontal Drilling in Yulin Gas Field

JiahuiNanmen, Renmin Road, Qindu District, Xianyang City, Shaanxi 712000, China

摘要

摘要: 榆林气田二开φ311.2 mm井眼属于大井眼、长裸眼井段,具有岩性多变、多套地层压力系统共存、水敏性黏土矿物含量高等特点,易出现起钻阻卡、拔活塞等复杂情况,决定使用油基钻井液,但必须解决其黏度控制问题。为此,以油酸为链终止剂,二甲苯为溶剂,以二聚酸和二乙烯三胺为原料,在230℃条件下合成了一种油基钻井液增黏剂,用红外光谱对该产品进行了表征,并对其性能进行了评价。实验结果表明:加入该增黏剂后钻井液在120℃热滚前后的表观黏度、塑性黏度值均比基浆高1倍;且加增黏剂后热滚前后的破乳电压基本保持不变。加有该剂的油基钻井液在靖平10-20、榆39-2H1、榆42-5H3和榆42-5H4井等4口水平井的二开井段进行了试验。通过现场试验发现,应用井段均未发生井壁失稳现象;泥饼光滑致密,有韧性;井径规则,井径扩大率小于5%;润滑性良好,现场滑动无托压现象。所以该体系适合四开下古水平井二开直井段大井眼施工。
- 油基钻井液 /
- 增黏剂 /
- 二聚酸
Abstract: Oil base drilling fluid has long been used in horizontal drilling in Yulin gas field to combat borehole wall collapse.A viscosifier used in drilling fluid was developed from dimeric dibasic acid and diethylenetriamine, and was characterized by IR.Laboratory evaluation shows that oil base drilling fluid treated with this viscosifier has AV, PV two times those of the base drilling fluid, both before and after hot rolling, while the electrical stability voltage remains almost unchanged.This viscosifier has been successfully used in field operation.
- Oil base drilling fluid /
- Viscosifier /
- Horizontal well

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