涠西南凹陷勘探开发一体化开发评价井钻探模式研究

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

陈奎 朱绍鹏 邹明生 盖永浩 董志华 朱玉双

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

西北大学地质学系，陕西西安 710069 大陆动力学国家重点实验室（西北大学），陕西西安 710069 中海石油（中国）有限公司湛江分公司，广东湛江 524057 中海石油（中国）有限公司海南分公司，海南海口 570300

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

为了推动北部湾盆地涠西南凹陷海上勘探开发一体化，解决传统的“探井—评价井—开发井—调整井”接力钻探模式评价时间久、建产周期长、开发经济门槛高、许多探明与控制地质储量难以动用等问题，提出了开发评价井钻探模式。开发评价井钻探模式包括开发模式和勘探模式。开发模式依托生产平台实现快速建产，分为生产平台钻探模式、生产井项目钻探或兼探模式；勘探模式针对生产平台范围外目标进行评价，落实储量规模、规避开发风险，分为快速评价模式、滚动探井兼探模式。上述4种开发评价井钻探模式在涠西南凹陷取得了显著的应用成效，已钻探45口开发评价井中有37口井取得成功，成功率达到82%。研究认为，开发评价井钻探模式能够落实新增探明地质储量并动用难动用储量，有效促进油田可持续开发，对于勘探开发成熟区研究具有指导和借鉴意义。

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.

国家科技重大专项“近海大中型油气田形成条件及勘探技术”（编号：2016ZX05024-006）资助

https://doi.org/10.11911/syztjs.2021108