渤海不同类型稠油油藏开发策略研究  

Research on development strategies of different types of heavyoil reservoirs in the Bohai Sea

作　　者：李廷礼 张墨 吴婷婷 谭捷 袁志乾 LI Tingli;ZHANG Mo;WU Tingting;TAN Jie;YUAN Zhiqian(CNOOC China Ltd.,Tianjin Branch,Tianjin,300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《天然气与石油》2023年第6期110-116,共7页Natural Gas and Oil

基　　金：“十四五”中国海洋石油有限公司重大科技项目“海上稠油热采有效开发技术”(KJGG2022-06)。

摘　　要：为提高渤海稠油油藏开发效益,根据油藏特征和海上生产条件,在开展冷采人工注水、热采转驱或蒸汽辅助重力驱(Steam Assisted Gravity Drainage,SAGD)的水体倍数界限、常规水驱与注蒸汽开发的流体性质界限和布井区油层厚度或油柱高度界限研究的基础上,结合先导试验认识与行业分类标准,提出了渤海稠油油藏分类标准并确定了不同的开发策略。普Ⅰ-1类稠油(50*~150*mPa·s),采用常规水驱、化学驱开发。普Ⅰ-2a类稠油(150*~350*mPa·s),采用常规水驱、热水驱开发。普Ⅰ-2b类稠油(350*~10000 mPa·s),弱水体油藏采用蒸汽吞吐、蒸汽驱开发;中、强水体油藏利用天然能量或人工注水开发;低油柱油藏采用火驱开发。特稠油块状底水稠油(10000~50000 mPa·s),采用蒸汽吞吐、SAGD开发的渤海不同类型稠油油藏开发策略与技术路线。研究结果为渤海稠油油田开发部署与技术攻关提供了依据。To enhance the efficiency of heavy oil reservoir development in the Bohai Sea,an approach rooted in reservoir characteristics and offshore production conditions has been conceived.This is founded on research concerning the limitations of cold production artificial water injection,thermal production transfer drive or SAGD,as well as the fluid property constraints of conventional water drive and steam injection development,coupled with the constraints of oil layer thickness or oil column height affecting well deployment areas.The understanding gleaned from pilot tests and industry classification standards have also been factored in.Consequently,the proposed classification criteria for heavy oil reservoirs in the Bohai Sea are as follows:General ClassⅠ-1 heavy oil(50*~150*mPa·s)will be developed utilizing conventional water flooding and chemical flooding techniques.General ClassⅠ-2a heavy oil(150*~350*mPa·s)will be developed through the conventional water drive and hot water drive.General Class I-2b heavy oil(350*~10000 mPa·s)and weak water oil reservoirs will be developed using steam hubbing and steam flooding,whereas medium and strong water reservoirs will be developed using natural energy or artificial water flooding.Low oil column reservoirs will be developed using fire drive.Extra heavy oil with blocky bottom-water heavy oil(10000~50000 mPa·s)will follow a development strategy and technical path distinct to the types of heavy oil reservoirs in the Bohai Sea,utilizing steam huff and puff and SAGD.This research provides a solid foundation for the development,deployment,and technical research of Bohai s heavy oil fields.

关 键 词：海上 稠油 开发策略 注蒸汽 采收率 

分 类 号：TE53[石油与天然气工程—油气田开发工程]