摘要
针对古龙页岩油地下储集状态、开采机理、原油流动、高效采出4大问题,提出了高效开发面临的关键理论技术问题和相应的对策建议。通过页岩储集层不同储集空间中的流体赋存状态、流体相态变化、开采机理、原油启动机制、流态和流动规律、开采方式和提高采收率途径等方面的重点探索研究,给出了页岩油多尺度赋存状态及纳米限域空间流体相态特征,明确了以压裂缝-页理缝-基质渗吸为核心的多相、多尺度流动模式及开采机理,初步建立了相应的多尺度流动数学模型和可采储量评价方法,探讨了早期补能开发模式及采收率达到30%的可行性。据此提出古龙页岩油有效开发进一步重点研究方向:(1)攻关岩心、流体原位原始状态取样及无损测试技术;(2)构建高温、高压、纳米尺度室内模拟实验方法;(3)研发融合多尺度、多流态的数值模拟技术与规模化应用软件;(4)攻关无水体系(CO_(2))压裂技术方法和增加垂直裂缝高度的压裂工艺;(5)探索早期补能提高采收率方法;(6)实施全生命周期技术经济评价。同时建议尽快开展多系列矿场试验,验证理论认识,优选开采方式,形成配套技术,提供可推广的开发模式,支撑和引领古龙页岩油规模有效开发上产。
Aiming at the four issues of underground storage state,exploitation mechanism,crude oil flow and efficient recovery,the key theoretical and technical issues and countermeasures for effective development of Gulong shale oil are put forward.Through key exploration and research on fluid occurrence,fluid phase change,exploitation mechanism,oil start-up mechanism,flow regime/pattern,exploitation mode and enhanced oil recovery(EOR)of shale reservoirs with different storage spaces,multi-scale occurrence states of shale oil and phase behavior of fluid in nano confined space were provided,the multi-phase,multi-scale flow mode and production mechanism with hydraulic fracture-shale bedding fracture-matrix infiltration as the core was clarified,and a multi-scale flow mathematical model and recoverable reserves evaluation method were preliminarily established.The feasibility of development mode with early energy replenishment and recovery factor of 30%was discussed.Based on these,the researches of key theories and technologies for effective development of Gulong shale oil are proposed to focus on:(1)in-situ sampling and non-destructive testing of core and fluid;(2)high-temperature,high-pressure,nano-scale laboratory simulation experiment;(3)fusion of multi-scale multi-flow regime numerical simulation technology and large-scale application software;(4)waterless(CO_(2))fracturing technique and the fracturing technique for increasing the vertical fracture height;(5)early energy replenishment to enhance oil recovery;(6)lifecycle technical and economic evaluation.Moreover,a series of exploitation tests should be performed on site as soon as possible to verify the theoretical understanding,optimize the exploitation mode,form supporting technologies,and provide a generalizable development model,thereby supporting and guiding the effective development and production of Gulong shale oil.
作者
袁士义
雷征东
李军诗
么忠文
李斌会
王瑞
刘一杉
王青振
YUAN Shiyi;LEI Zhengdong;LI Junshi;YAO Zhongwen;LI Binhui;WANG Rui;LIU Yishan;WANG Qingzhen(CNPC Advisory Center,Beijing 100724,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;PetroChina Daqing Oilfield Co.,Ltd.,Daqing 163002,China)
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2023年第3期562-572,共11页
Petroleum Exploration and Development
基金
国家自然科学基金联合基金重点支持项目“古龙页岩油开发渗流理论与提高采收率机理研究”(U22B2075)。
关键词
古龙页岩油
陆相页岩油
纳米限域空间
开采机理
流动模式
早期补能
提高采收率
Gulong shale oil
continental shale oil
nano confined space
production mechanism
flow mode
early energy replenishment
enhanced oil recovery
