摘要
与成功进行页岩气开发的北美地区及四川盆地内勘探开发区块不同,昭通国家级页岩气示范区具有微幅度构造及裂缝发育、应力条件差、箱体厚度薄等特点,水平井钻井中轨迹控制难度大,页岩气高效开发难度高。综合地质工程因素,统筹考虑,进行轨迹优化控制,以经济效益为前提建立钻井提速提效模式。其核心在于通过钻前分析、钻中优化、钻后评价,不断探索优质页岩储层空间展布规律、优选技术方案,采用元素录井+随钻伽马控制技术、地震逐点引导技术、蚂蚁体+视极性工程预警技术和导向工具优化组合,实现箱体的准确着陆及水平段的精准穿行,有效保障了水平段优质储层钻遇率和轨迹平滑,钻井品质不断提升,为实现单井高产打下坚实基础,地质工程一体化导向技术现场应用效果显著。
Compared with the shale gas fields in North America and the Sichuan Basin,the Zhaotong National Shale Gas Demonstration Zone is characterized by micro-relief structures with developed fractures,poor stress conditions and narrow target reservoir window.In this zone,it is hard to control the trajectory of a horizontal well and develop efficiently.Considering geological and engineering factors,a model was proposed for increasing ROP and production efficiency by controlling trajectory at low cost.The model emphasizes geological optimization in pre-drilling,drilling and post-drilling analysis to understand the distribution law of high-quality shale reservoirs and technical designing.It ensures the precision in landing and tracking horizontal section by integrating techniques including element mud logging+gamma ray control while drilling,point-by-point seismic guidance,ant tracking+apparent polarity attributes,and geosteering tools.It ensures drill-in rate and smooth trajectory,improves drilling quality and lays a solid foundation for high gas production.The proposed geosteering technology has been successfully applied in field.
作者
梁兴
徐进宾
刘成
焦亚军
舒红林
陈安环
卞维坤
陶晓峰
Liang Xing;Xu Jinbin;Liu Cheng;Jiao Yajun;Shu Honglin;Chen Anhuan;Bian Weikun;Tao Xiaofeng(PetroChina Zhejiang Oilfield Company)
出处
《中国石油勘探》
CAS
CSCD
北大核心
2019年第2期226-232,共7页
China Petroleum Exploration
基金
国家科技重大专项“昭通页岩气勘探开发示范工程”(2017ZX05063)
关键词
山地页岩气
地质工程一体化
井眼轨迹
钻遇率
井筒完整性
mountain shale gas
geology-engineering integration
well trajectory
drill-in rate
wellbore integrity
作者简介
第一作者:梁兴(1965-),男,广西北流人,博士,2006年毕业于西南石油大学,教授级高级工程师,主要从事页岩气、煤层气、高凝油和常规气综合评价及勘探开发管理工作。地址:浙江省杭州市西湖区留下荆山岭中国石油浙江油田公司,邮政编码:310023.E-mail:liangx85@petrochina.com.cn.
