鄂尔多斯盆地长7页岩油开发技术实践——以庆城油田为例  

Development technologies for Triassic Chang 7 shale oil in Ordos Basin:A case study of Qingcheng Oilfield,NW China

作　　者：何永宏[1] 薛婷[2,3] 李桢 白晓虎 樊建明[2,3] 张旭泽 HE Yonghong;XUE Ting;LI Zhen;BAI Xiaohu;FAN Jianming;ZHANG Xuze(PetroChina Changqing Oilfield Company,Xi’an 710018,China;National Engineering Laboratory for Exploration and Development of Low Permeability Oil&Gas Fields,Xi’an 710018,China;Research Institute of Exploration&Development,PetroChina Changqing Oilfield Company,Xi’an 710018,China;Oil&Gas Technology Research Institute,PetroChina Changqing Oilfield Company,Xi’an 710018,China)

机构地区：[1]中国石油长庆油田公司,西安710018 [2]低渗透油气田勘探开发国家工程实验室,西安710018 [3]中国石油长庆油田公司勘探开发研究院,西安710018 [4]中国石油长庆油田公司油气工艺研究院,西安710018

出　　处：《石油勘探与开发》2023年第6期1245-1258,共14页Petroleum Exploration and Development

基　　金：中国石油科技重大专项“鄂尔多斯盆地页岩油勘探开发理论与关键技术研究”(2021DJ1806);中国石油科技重大专项“陆相页岩油规模增储上产与勘探开发技术研究”(2023ZZ15)。

摘　　要：针对鄂尔多斯盆地庆城油田三叠系延长组7段(简称长7)页岩油单砂层厚度薄、储集层致密且非均质性强、地层压力系数低、地貌复杂等特点,历经勘探发现、评价探索、开发试验、规模开发阶段,形成了以“甜点”优选技术、差异化立体布井技术、大井丛水平井优快钻完井技术、长水平井细分切割体积压裂技术和合理生产制度优化技术为核心的技术体系,以及黄土塬大平台工厂化作业为主的生产组织模式。通过以上关键技术的应用,大幅度提高了庆城油田单井产量,降低了投资成本,实现了完全成本55美元下的规模效益开发,2022年鄂尔多斯盆地长7页岩油年产油量达到221×10^(4)t,占中国页岩油年产量的70%,为陆相页岩油高效开发提供了有益借鉴。The reservoirs in the seventh member of the Triassic Yanchang Formation(Chang 7 Member)in the Qingcheng Oilfield of the Ordos Basin are characterized by thin sandbody,tight rocks,high heterogeneity,low formation pressure coefficient,and complex geomorphology.Through the efforts in the stages of exploration,appraisal,pilot testing and development,a series of key technologies have been formed,including“sweet spot”optimization,differentiated three-dimensional well deployment,fast drilling and completion of large-scale horizontal well cluster,intensively-staged volume fracturing in long horizontal well,and optimization of rational production system.Furthermore,a production organization mode represented by factory-like operations on loess platform has been implemented.Application of these technologies has enabled to significantly improve the single-well production of the Qingcheng Oilfield,reduce the investment cost,and realize a large-scale and beneficial development at a full cost below$55 per barrel.In 2022,the annual production of Chang 7 shale oil in the Ordos Basin reached 221×10^(4) t,accounting for 70%of the annual shale oil production of China.The practice of development technologies in the Qingcheng Oilfield provides valuable references for efficient development of continental shale oil.

关 键 词：鄂尔多斯盆地 页岩油 开发技术 开发效果 庆城油田 

分 类 号：TE122.3[石油与天然气工程—油气勘探]