南海西部复杂断块低渗油田开发技术进展及发展方向  

Progress and development direction of development technology for low-permeability oil field in complex fault blocks in the western South China Sea

作　　者：马勇新 张乔良 鲁瑞彬 于成超 阮洪江 唐蓿 吴绍伟 孙胜新 Ma Yongxin;Zhang Qiaoliang;Lu Ruibin;Yu Chengchao;Ruan Hongjiang;Tang Xu;Wu Shaowei;Sun Shengxin(Zhanjiang Branch of CNOOC(China)Co.,Ltd.)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东省湛江市524057

出　　处：《中国石油勘探》2024年第3期1-9,共9页China Petroleum Exploration

基　　金：中海石油(中国)有限公司重大科技项目“南海西部油田上产2000万方关键技术研究”(CNOOC-KJ 135 ZDXM 38 ZJ)。

摘　　要：南海西部复杂断块低渗油田整体储量规模大,是南海西部油田下一步产能接替的重点靶区,但断块小、油藏埋深大,储层复杂,高效开发难度大。针对储层非均质性强,平面储层变化快,储层物性主控因素复杂问题,采用精细油藏描述技术精准预测“甜点”储层的展布,为低渗储层开发井的部署指引方向;为解决低渗油藏水敏严重常规注海水开发效果差难题,攻关注气重力辅助驱及纳滤海水驱替技术,建立低渗油田有效驱替技术系列,完善注采井网,提高驱替效果;为应对海上平台井槽资源受限问题,采用少井高产技术,利用复杂结构井,有效提高单井波及范围。同时,研发低渗油田高效开发配套技术,整合资源,盘活内部及周边区域潜力,为南海西部油田上产稳产奠定坚实的技术基础。The low-permeability oil field in complex fault block in the western South China Sea has a large reserve scale,which is a key target area for production capacity replacement in the near future.However,the fault block is characterized by small area,great burial depth of oil reservoir,and complex reservoir characteristics,leading to great challenge in high-efficiency oil field development.In view of the high reservoir heterogeneity,rapid reservoir changes in lateral,and complex main controlling factors for reservoir physical properties,the fine reservoir description technology has been used to accurately predict the distribution of“sweet spot”reservoir,which guides the deployment of development wells;In response to the poor development results by conventional seawater injection due to the strong water sensitivity of low-permeability reservoir,gas injection gravity auxiliary displacement and nanofiltration seawater displacement technology have been researched,and an effective displacement technology series for low-permeability oil fields has been established,improving the injection-production well pattern and enhancing the displacement results;By considering the limited well slot resources on offshore platforms,the technology of high-yield production with few wells has been adopted,and complex well structure has been applied to effectively improve the sweep range of single wells.Meanwhile,supporting technology for the high-efficiency development of low-permeability oil field has been researched and developed,which supports to integrate resources and revitalize internal and surrounding potential,laying a solid technical foundation for production increase of the western oil fields in South China Sea.

关 键 词：复杂断块 低渗油田 甜点预测 注气开发 复杂结构井 

分 类 号：TE53[石油与天然气工程—油气田开发工程]