北部湾盆地开发井表层钻井模式  

The pattern of surface drilling in development wells of Beibu Gulf Basin

作　　者：赵宝祥 陈江华[1] 徐一龙 郑浩鹏 殷水平 

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057 [2]中海油田服务股份有限公司湛江分公司,广东湛江524057

出　　处：《石油钻采工艺》2015年第6期23-26,共4页Oil Drilling & Production Technology

摘　　要：南海西部海域北部湾盆地地质条件复杂,进行开发井表层钻井时,存在井壁失稳、钻井液性能不易控制、井眼轨迹不易控制等问题,导致表层钻井井眼携岩困难、定向滑动钻进摩阻大效率低,还存在较大的防碰风险。而目前该盆地以低品位油气藏或边际油气田为主,油田开发效益低,因此需要进行有效的钻井成本控制。介绍了北部湾盆地开发井表层钻井的技术难点;通过优化井身结构、选用经济适用型海水膨润土浆钻井液体系、优化设计螺杆钻具组合及改进随钻测量系统,形成了一套提高该盆地开发井表层钻井效率、降低作业风险的方法。现场应用表明,该模式能在保障作业安全与质量的前提下,提高钻井效率,降低钻井成本,该模式也可为现场施工人员提供技术参考。The geological conditions of Beibu Gulf Basin in the western South China Sea are very complex. When drilling the surface layers of development wells, there existed such problems as wellbore instability, dififculty in controlling drilling lfuid properties, dififculty in controlling wellbore trajectory, and so no, which led to dififculty in sand carrying in surface drilling hole, large friction and low efifciency in directional slide drilling, and there also existed great risk of borehole collision. Now this Basin is mainly dominated by low quality oil/gas reservoirs or marginal oil/gasifelds and the oilifeld has low development beneift, so drilling cost must be controlled effectively. This paper presents the technical dififculties in surface drilling in development wells in Beibu Gulf Basin. A set of method which improves surface drilling efifciency in development wells in this Basin and reduces drilling risks has been developed by optimizing the wellbore conifguration, using economic and applicable seawater bentonite drilling lfuid system, optimizing the design of positive displacement motor assembly and improving the measurement while drilling system. The ifeld application shows that this pattern can increase drilling efifciency and reduce drilling costs while guaranteeing drilling safety and quality. This pattern can also provide technical references for ifeld workers.

关 键 词：北部湾盆地 开发井 表层钻井 作业模式 钻井效率 

分 类 号：TE242[石油与天然气工程—油气井工程]