松辽盆地北部油气勘探新领域、新类型及资源潜力  

New fields,new types and resource potentials of oil-gas exploration in northern Songliao Basin

作　　者：王小军 白雪峰 陆加敏[3,4] 金之钧 王贵文[1] 匡立春 李军辉[3,4] 李敬生 张金友 孙立东[3,4] 吴景峰 孙海雷[3,4] Wang Xiaojun;Bai Xuefeng;Lu Jiamin;Jin Zhijun;Wang Guiwen;Kuang Lichun;Li Junhui;Li Jingsheng;Zhang Jinyou;Sun Lidong;Wu Jingfeng;Sun Hailei(College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;Daqing Oilfield Limited Company,Heilongjiang Daqing 163002,China;National Key Laboratory for Green Mining of Multi-resource Collabrative Continental Shale Oil,Heilongjiang Daqing 163712,China;Exploration and Development Research Institute,Daqing Oilfield Limited Company,Heilongjiang Daqing 163712,China;Institute of Energy,Peking University,Beijing 100871,China)

机构地区：[1]中国石油大学(北京)地球科学学院,北京102249 [2]大庆油田有限责任公司,黑龙江大庆163002 [3]多资源协同陆相页岩油绿色开采全国重点实验室,黑龙江大庆163712 [4]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [5]北京大学能源研究院,北京100871

出　　处：《石油学报》2023年第12期2091-2103,2178,共14页Acta Petrolei Sinica

基　　金：中国石油天然气股份有限公司科技重大专项(2016EG0201);黑龙江省"百千万"工程科技重大专项"松辽盆地北部古龙页岩油成藏条件及甜点分布规律研究"(SC2020ZX05A0023)资助。

摘　　要：大庆油田历经60多年发展,常规油气资源已步入勘探后期,新领域、新类型的非常规油气资源成为油田高质量发展的重要接续。松辽盆地北部主要发育坳陷期青山口组和断陷期沙河子组2套烃源岩,结合非常规油气的成藏条件与勘探潜力,目前形成了一系列新领域、新类型油气勘探的创新性理论与技术成果。主要表现为:①创新了页岩油原位成藏理论,认为"厚层高含氢指数页岩、大规模有机孔隙、超低孔喉自封闭"是页岩油富集的主控因素,预测松辽盆地北部页岩油资源量为151×10^(8)t,页岩油是大庆油田大规模增储上产的核心领域;②建立了源下致密油断裂带控藏新模式,指出"青山口组源岩生烃增压、油气沿断裂向下倒灌"的致密油富集新认识,预测致密油资源量为21.85×10^(8)t,致密油是大庆油田规模增储的重要保障;③提出了以超压为核心的致密气富集的新认识,建立了"源内生烃增压、两侧扇体聚集"的沙河子组超压致密气成藏新模式,初步评价致密气资源量为10960×10^(8)m^(3),致密气是大庆油田天然气规模增储的现实领域。松辽盆地北部新领域、新类型的油气资源潜力大,是大庆油田保持原油稳产3000×10^(4)t的重要资源基础;其油气勘探经验可为其他盆地提供借鉴和启示。After more than 60 years of development,Daqing oilfield has entered the late stage of exploration for conventional oil-gas resources.New fields and new types of unconventional hydrocarbon resources have become vital replacement energies supporting the high-quality development of the oilfield.The northern Songliao Basin mainly develops two sets of source rocks,i.e.Qingshankou Formation during the post-rifting period and Shahezi Formation during the syn-rifting period.In combination with the accumulation conditions and exploration potential of unconventional oil and gas,a series of innovative theories and technical achievements in new fields and new types of oil-gas exploration have been gained as below.(1)Based on innovation in the theory of in-situ shale oil accumulation,it is believed that thick shale with high hydrogen index,large-scale organic pores,and self-sealing ultra-low pore throat are the main controlling factors for shale oil enrichment.It is predicted that the shale oil resources in northern Songliao Basin can amount to 151×10^(8)t and shale oil is the core field for largely increasing reserves and production in Daqing oilfield.(2)A new fault-controlled accumulation model of tight oil reservoir under source has been established,pointing out a new understanding of tight oil enrichment of"hydrocarbon-generating overpressure in Qingshankou Formation,downward hydrocarbon migration along the fault".The amount of tight oil resources is predicted to be 21.85×10^(8)t,and tight oil provides a crucial guarantee for largely increasing reserves and production in Daqing oilfield.(3)A new understanding of tight gas enrichment with a focus on overpressure has been proposed herein,and a new accumulation model for overpressured tight gas reservoirs in Shahezi Formation has been also established,characterized by"hydrocarbon-generating overpressure in source,oil-gas accumulation in sedimentary fans on both sides".The tight gas resources are preliminary evaluated to be 10960×10^(8)m^(3),indicating tight gas is a real

关 键 词：松辽盆地北部 新领域 新类型 页岩油 致密油 致密气 

分 类 号：TE132.1[石油与天然气工程—油气勘探]