第33卷第3期 2016年5月
钻井液与完井液
DRILLINGFLUID &COMPLETION FLUID
doi: 10.3696/j.issn.1001-5620.2016.03.013
Vol.33 No.3 May2016
强絮凝钻井液在苏里格气田的试验应用
陈在君1,2
（1.川庆钻探工程公司钻采工程技术研究院，西安710018；2.低渗透油气田勘探开发国家工程实验室，西安710018）陈在君.强絮凝钻井液在苏里格气田的试验应用[1].钻井液与完井液，2016，33（3)：64-66.
摘要随着国家环境保护工作的进一步深入，地面泥案池进行钻井液净化处理的方式将会被彻底取消，这就要求钻井液必须进行罐式循环。为提高罐式循环的钻井液净化效果、维持良好的钻井液性能参数，保障井下施工安全顺利，研制出了适合苏里格气田钻井现场用快速絮凝的强絮凝处理剂，并确定了强絮凝剂钻并液的配方。室内实验表明，在20s的时间内，该钻井液能快速对浓度为100kg/m"的膨润土浆进行有效絮凝沉降，使固液分离、实现净化目的，满足了钻井现场罐式循环钻井液净化的需要。该钻井液在S47-8-66H2井进行了现场试验应用，试验井段长1800m，平均机械钻速为27.42m/h，与2014年苏里格水平井直并役平均机械钻速23.00m/h相比，提高了19.22%；该钻井液在罐式循环中成功地实现了良好净化，为苏里格气田钻井现场岩屑不落地的环境保护工作提供了很好的借鉴作用。
关键词钻井液；强絮凝；无固相；净化；罐式循环；苏里格气田
中图分类号：TE254.3
文献标识码：A
文章编号：1001-5620（2016）03-0064-03
The Application of Strongly Flocculent Drilling Fluid in Sulige Gas Field
CHENZaijun',2
(1.Drilling&ProductionTechnologyResearchInstituteofCCDE,Xi'an,Shaanxi710018;
2.StateKeyLaboratory of LowPermeabilityGasFieldExplorationandDevelopment,Xi'an,Shaanxi710018)
Abstract As the environment protection requirements are becoming more stringent, mud pits for surface circulation of drilling fluid will be completely replaced by mud tanks with which the drilling fluid is circulated at the surface, To clean the mud effectively and efficiently with mud tank circulation, and maintain good drilling fluid properties to ensure safe drilling, a strong flocculent for fast flocculation used in Sulige gas field has been developed, and the formulation of a drlling fluid containing the flocculent is determined. In laboratory experiments, the formulated drilling fluid can effectively flocculate a 100 kg/m' bentonite slurry in 20 s, finally separating the solids with the liquid. This drilling fluid was tried in the well S47-8-66H2. The length of the well using this drilling fluid is 1 800 m, and the average ROP is 27.42 m/h. Compared with the average ROP, 23.00 m/h, obtained in drilling the vertical sections of horizontal wells in Sulige in 2014, an increase in average ROP of 19.22% has been realized. This drilling fluid can be well cleaned through surface tank circulation, providing successful experiences for environment protection through no drilled cuttings on the ground" at the drilling site in Sulige gas field.
Key words Drilling fluid; Strong flocculation; Solids-free; Cleaning; Circulation with mud tank; Sulige gas field
0引言
长庆苏里格气田是中国主要天然气气田之一，已开发多年，一直使用清水聚合物钻井液结合地面泥浆池进行钻井液净化，成效十分显著，但随着国家加强环境保护工作的进一步深人，已开始要求钻
井现场实现钻井岩屑和废液不落地处理，这就要求钻井液必须进行罐式循环为此，将可能使钻井液净化效果变差、净化不彻底，即可能会出现钻井液固相含量增高、密度变大、流变性变差，也会增大钻井施工的风险，降低钻井速度[-5]。
为实现钻井现场岩屑和钻井废液不落地要求，
作者简介：陈在君，高级工程师，1964年生，现在从事技术管理及钻完井液的研究工作。电话（029）86593620;E-mail：
chenzaijun@cnpc.com.cn。万方数据