中国东部陆相断陷盆地中—低成熟度页岩油立体开发技术——以济阳坳陷古近系沙河街组为例  

Stereoscopic development techniques for shale oil with low-medium maturity in continental faulted basins in eastern China:a case study of the Paleogene Shahejie Formation in Jiyang depression

作　　者：杨勇[1,2] 张世明 吕琦 杜玉山 李伟忠 程紫燕 吕晶 刘祖鹏 Yang Yong;Zhang Shiming;LüQi;Du Yushan;Li Weizhong;Cheng Ziyan;LüJing;Liu Zupeng(Sinopec Shengli Oilfield Company,Shandong Dongying 257000,China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing 102206,China;Research Institute of Exploration and Development,Sinopec Shengli Oilfield Company,Shandong Dongying 257000,China)

机构地区：[1]中国石油化工股份有限公司胜利油田分公司,山东东营257000 [2]页岩油气富集机理与高效开发全国重点实验室,北京102206 [3]中国石油化工股份有限公司胜利油田分公司勘探开发研究院,山东东营257000

出　　处：《石油学报》2024年第4期672-682,697,共12页Acta Petrolei Sinica

基　　金：中国石油化工股份有限公司重点科技攻关项目“东营凹陷页岩油立体开发优化设计关键技术”(P23026)资助。

摘　　要：济阳坳陷是中国东部陆相断陷盆地的典型代表,新生界古近系沙河街组沉积一套巨厚的中—低成熟度页岩,能否有效开发动用其页岩油对于认识同类型页岩油潜力意义重大。通过50余口取心井系统的岩相、储集性及含油性研究与评价,对比国内外不同盆地页岩油特征差异发现,济阳页岩油咸化湖盆碳酸盐含量高,断陷盆地发育不同尺度裂缝,演化程度低导致储集空间以无机孔-缝为主,储集物性好但原油流动能力差。依据济阳页岩油地质特点,提出了以甜点立体综合评价、立体井网优化设计、立体压裂优化设计、全过程实施优化调控为核心的立体开发技术,建立了整体压裂同步投产、分批压裂逐步投产、立体滚动开发3种立体开发模式,矿场先导试验取得了突破,证实了中—低成熟度页岩油具有广阔的开发潜力。Jiyang depression is a typical continental faulted basin in eastern China,of which the Cenozoic Paleogene Shahejie Formation deposited a thick set of shale with low-medium maturity.Whether the shale oil can be effectively produced is crucial for understanding the potential of similar types of shale oil.The paper systematically studies and evaluates the lithologies,reservoir capabilities,and oil-bearing properties of more than 50 cored wells,and compares the differences in shale oil characteristics between different basins.The results indicate that the saline lacustrine basin of shale oil in Jiyang depression has a high carbonate content;various scales of fractures are developed in faulted basins;the reservoir space is dominated by inorganic pores and fractures due to a low degree of thermal evolution;the reservoir properties are good,and the flow capacity of crude oil is poor.Based on the geological characteristics of shale oil in Jiyang depression,this paper proposes a stereoscopic development technology focusing on the comprehensive stereoscopic evaluation of sweet spots,stereoscopic well pattern optimization design,stereoscopic fracturing optimization design,as well as the whole process optimization and control.Moreover,three stereoscopic development models have been established,including synchronous production of integral fracturing,step-by-step production by fracturing in batches,and stereoscopic scrolling development.Breakthroughs have been achieved in the pilot test of the field,confirming the broad development potential of shale oil with low-medium maturity.

关 键 词：中—低成熟度 页岩油 立体开发 济阳坳陷 陆相断陷盆地 

分 类 号：TE349[石油与天然气工程—油气田开发工程]