Research on Development Evaluation Well Drilling Modes for Exploration and Development Integration in Weixinan Sag

CHEN Kui; ZHU Shaopeng; ZOU Mingsheng; GAI Yonghao; DONG Zhihua; ZHU Yushuang

doi:10.11911/syztjs.2021108

Volume 49 Issue 6

Dec. 2021

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Petroleum Drilling Techniques > 2021 > 49(6): 42-49. > DOI: 10.11911/syztjs.2021108

CHEN Kui, ZHU Shaopeng, ZOU Mingsheng, GAI Yonghao, DONG Zhihua, ZHU Yushuang. Research on Development Evaluation Well Drilling Modes for Exploration and Development Integration in Weixinan Sag[J]. Petroleum Drilling Techniques, 2021, 49(6): 42-49. DOI: 10.11911/syztjs.2021108

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Research on Development Evaluation Well Drilling Modes for Exploration and Development Integration in Weixinan Sag

1.
Department of Geology, Northwest University, Xi’an, Shaanxi, 710069, China
2.
State Key Laboratory of Continental Dynamics(Northwest University), Xi’an, Shaanxi, 710069, China
3.
Zhanjiang Branch of CNOOC Ltd., Zhanjiang, Guangdong, 524057, China
4.
Hainan Branch of CNOOC Ltd., Haikou, Hainan, 570300, China

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Received Date: January 22, 2021
Revised Date: August 22, 2021
Available Online: November 11, 2021

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Abstract

Abstract

In order to promote the integration of offshore exploration and development in Weixinan Sag of Beibuwan Basin, and solve such problems in the traditional drilling mode of “exploration well–evaluation well–development well–adjustment well”, as long evaluation times and production periods, high development economic threshold and proven and controlled geological reserves that are difficult to produce, drilling modes of development evaluation well was proposed. The modes included both the development mode and exploration mode. The development mode was based on the production platform to achieve rapid production and was divided into production platform drilling mode and development well project drilling or concurrent exploration mode. The exploration mode was aimed at evaluating the targets outside the production platform, determining the reserve scale, and avoiding development risk. The process was divided into rapid evaluation mode and concurrent exploration mode of rolling exploration well. The four drilling modes above have achieved remarkable application effect in 45 development evaluation wells in Weixinan Sag, of which 37 were drilled successfully with a success rate of 82%. The research result show that the proposed drilling modes can promote new proven reserves and the difficult-to-produce reserves, and effectively promote sustainable development of oilfields, with great guiding and referential significance in the exploration and development of mature areas.
- exploration and development integration,
- development evaluation well,
- drilling mode,
- Weixinan Sag,
- Beibuwan Basin

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Research on Development Evaluation Well Drilling Modes for Exploration and Development Integration in Weixinan Sag

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