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A review of SAGD technology development and its possible application potential on thin-layer super-heavy oil reservoirs

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Geoscience Frontiers 2022年第4期13卷 1-10页

作者： Guodong Cui Ting Liu Jingyu Xie Guanghui Rong Lihong Yang Faculty of Engineering China University of GeosciencesWuhan 430074China The 2th Oil Production Plant of PetroChina Changqing Oilfield Company Qingyang 710021China School of Resources and Geosciences China University of Mining and TechnologyXuzhou 221116China The 12th Oil Production Plant of PetroChina Changqing Oilfield Company Xi’an 710000China Sinopec Petroleum Exploration and Production Research Institute Beijing 100083China

Super-heavy oil is a significant unconventional energy source,and more than 30 years of research have shown that steam-assisted gravity drainage(SAGD)technology is suitable for thick super-heavy oil ***,more and more thin-layer super-heavy oil reservoirs have been discovered in China,while their deep buried depth and serous heterogeneity make the existing SAGD technology difficult to apply,so it is urgent to improve the existing SAGD technology for the thin-layer super-heavy *** this end,this paper focuses on the enlightenment of field application in SAGD ***,based on typical SAGD field projects,the development history of SAGD technology in the world was reviewed,and the influence of reservoir physical properties on the application of SAGD technology in thin-layer superheavy oil reservoirs was ***,the well pattern,wellbore structure,pre-heating,artificial lift,and monitor technique of SAGD were detailed described,and their adjustment direction was expounded for the development of thin-layer super-heavy oil ***,the gas-and solventassistant SAGD were comprehensively evaluated,and their application potential in thin-layer superheavy oil reservoirs was *** research results can provide theoretical guidance for the application of SAGD technology in thin-layer super-heavy oil reservoirs.

关键词： SAGD Thin-layer super-heavy oil development technology Multimedia assisted SAGD

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

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Petroleum Exploration and development 2023年第6期50卷 1426-1444页

作者： HE Yonghong XUE Ting LI Zhen BAI Xiaohu FAN Jianming ZHANG Xuze PetroChina Changqing Oilfield Company Xi’an 710018China National Engineering Laboratory for Exploration and development of Low Permeability Oil&Gas Fields Xi’an 710018China Research Institute of Exploration&development PetroChina Changqing Oilfield CompanyXi’an 710018China Oil&Gas technology Research Institute PetroChina Changqing Oilfield CompanyXi’an 710018China

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-cluster horizontal well, 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： Ordos Basin shale oil development technology development effect Qingcheng Oilfield

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遗留系统的改建技术分析及利用策略

遗留系统的改建技术分析及利用策略

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第十八届全国数据库学术会议

作者：郑伟宋雨陈基禄华北电力大学计算机科学与工程系

1引言因特网及电子商务的迅猛发展给信息界和软件产业界带来了巨大影响,与之相关的CORBA及COM组件技术越来越成熟,同时还涌现出大量不依赖于现有体系结构的新应用程序,这一切都为遗留系统带来了新的生机,也为遗留系统的改造开辟了新路... 详细信息

1引言因特网及电子商务的迅猛发展给信息界和软件产业界带来了巨大影响,与之相关的CORBA及COM组件技术越来越成熟,同时还涌现出大量不依赖于现有体系结构的新应用程序,这一切都为遗留系统带来了新的生机,也为遗留系统的改造开辟了新路。首先,给出遗留系统的定义。

关键词： Legacy system development technology Reconstruction Wrap Migration

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