天然气与石油2017，Vol.35Issue(4)：88-93,6.DOI:10.3969/j.issn.1006-5539.2017.04.016
CT1井膏盐层钻井液技术
Drilling Fluid Technology for Salt Layer at Well CT 1
祝学飞 1周华安 2孙俊 1黄念义 1舒义勇1
作者信息
- 1. 川庆钻探工程有限公司塔里木工程公司, 新疆 库尔勒 841000
- 2. 中国石油集团川庆钻探工程有限公司钻井液技术服务公司, 四川 成都 610051
- 折叠
摘要
Abstract
The buried depth of the salt layer of well CT 1 is 7 106~7 806.5 m, and the layer is Cambrian.No drilling fluid can be used for reference.The bottom hole temperature is 170℃, and fall-off, well leakage, rheological complexity will appear during the drilling process will.In this paper, the sulfonated lignite SMC substitution thinner is used to improve the flow pattern of the traditional unsaturated salt water under the conditions of high temperature and complexity in downhole, and the issue of"to add and to discharge"caused by strong dispersion and strong dependency resulted from dilution to deep well at later stage is solved.The functional nanoemulsion TYRF-1 is introduced.With the use of nanoemulsion characteristics, the nature of the interface of colloidal particles is changed so as to solve the problem of high temperature foaming, while enhancing the system lubrication performance.Then enhanced sealing is achieved by combining with composite asphalt at high softening point.The filter loss at high temperature and high pressure shall be controlled to solve the issue of borehole instability and fall-off;acid-soluble plugging agent SQD-98, rigid plugging agent KGD-1/2/3/4 are used at leakage section to avoid severe well leakage.The optimized drilling fluid system guarantees the drilling at salt layer of well CT 1.关键词
膏盐层/高温/优化/SMC/纳米乳液/井壁失稳/井漏Key words
Salt layer/High temperature/Optimization/SMC/Nano-emulsion/Borehole instability/Lost circulation引用本文复制引用
祝学飞,周华安,孙俊,黄念义,舒义勇..CT1井膏盐层钻井液技术[J].天然气与石油,2017,35(4):88-93,6.
