苏里格气田长水平段水平井钻井关键技术——以S77-35-H5井为例  

Key drilling technologies for horizontal wells with long intervals,Sulige gasfield:An example from S77-35-H5 well

作　　者：李高刚 魏祥高 汪孝贵 唐健 芦宏斌 马兰波 张亥先 杨海斌 LI Gaogang;WEI Xianggao;WANG Xiaogui;TANG Jian;LU Hongbin;MA Lanbo;ZHANG Haixian;YANG Haibin(Yumen Drilling Company,CNPC Xibu Drilling Engineering Company Limited,Xi'an,Shaanxi 710000,China)

机构地区：[1]中国石油西部钻探玉门钻井公司,陕西西安710000

出　　处：《天然气技术与经济》2024年第2期8-13,共6页Natural Gas Technology and Economy

基　　金：中国石油西部钻探重点科技计划项目“苏里格水平并立体开发并网并身结构优化及关键技术集成研究”(编号:2023K2017)。

摘　　要：为了进一步降低钻井作业成本、提高单井产量、解决长水平段水平井使用“常规动力工具+水基钻井液”替代“旋转导向+油基钻井液”过程中出现的系列问题,采用鄂尔多斯盆地苏里格气田长水平段水平井配套技术实现了低成本开发。研究结果表明:(1)采用“双二维七段制”轨道,可以解决螺杆工具面摆放困难及钻具屈曲的问题;(2)应用数学建模+工程干预技术,能有效提高井筒清洁度;(3)采用井筒压力监测+漂浮下套管综合技术,可以实现顺利下套管;(4)近钻头GR地质导向技术能提高砂层钻遇率;(5)有机盐钻井液体系能有效预防井下坍塌及漏失。现场应用结果表明,起下钻摩阻下降11%,钻进扭矩下降17%,综合钻井速度提高28%,有效降低钻井成本。结论认为,该技术的成功研究为苏里格气田长水平段水平井低成本开发提供了借鉴,也为油气田提质增效开辟了新思路。In order to further reduce drilling costs,improve single-well production and solve problems existing in the re⁃placing of"rotary steering+oil-based drilling fluid"with"conventional power tools+water-based drilling fluid"in hori⁃zontal wells with long intervals,several technologies were applied to such wells in Sulige gasfield to achieve the low-cost development.Results show that(i)the"dual two-dimension seven-interval"trajectory can deal with drilling tools'bending and some difficulties in setting screw tool face;(ii)both mathematical modeling and engineering intervention can enhance the degree of hole cleaning with effect;(iii)one technology integrating wellbore pressure monitoring with floating casing running can complete smooth running;(iv)the technology of near-bit GR geosteering can boost the drilling rate in sand⁃body;and(v)the organic salt drilling-fluid system is able to guard against downhole collapse and lost circulation effective⁃ly.The application of these technologies makes the friction during the trip and the drilling torque individually reduced by 11%and 17%,and the composite rate of penetration increased by 28%.As a result,the drilling costs are cut down.In conclusion,this technological success provides a basis for the low-cost development of horizontal wells with long intervals in Sulige gasfield and creates novel ideas for improving both quality and efficiency in oil and gasfields.

关 键 词：鄂尔多斯盆地 苏格里气田 井身结构 轨迹优化 减摩降阻 井眼清洁 数值模拟 

分 类 号：TE243[石油与天然气工程—油气井工程]