剩余油“势控论”的初步构建及再生潜力区模式
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摘要
油田开发(注水)中剩余油的分布与富集规律受油藏的静态与动态因素控制,低势闭合区是形成经济可动剩余油的必要条件,是油藏剩余油可能分布与富集的基本单元,而仅立足于单一的静态因素的“正向型微构造”控油论不能合理地解释开发实践中潜力区的新类型与新领域.由此提出并初步构建了剩余油的“势控论”理论,摆脱了油田剩余油分布与富集的“正向型微构造”控油论的束缚,同时,建立了“动态富集再生油藏成藏模式”,为目前油田剩余油研究与实践领域的开拓提供了理论基础,拓展了油田的挖潜领域与方向.这将对我国老油田后期的挖潜与提高采收率,尤其是特高含水低效开发油藏的战略调整、停产与半停产油藏的产能恢复及废弃油藏的再度开发等二次采油期的延拓具有重要的战略意义.
The stress of geologic research is put on the description of economic movable remaining oil distribution in the medium-later period of oilfield development,whose theoretical basis is "the theory of positive microstructure controlling remaining oil" and whose research method is "fine reservoir description".That is,the remaining oil distribution is determined by the fine portrayal of the static characters of reservoir,and this can provide the bases for the economic and feasible measures and methods of enhancing recovery factor and improving development result.The practices of oilfield development and the research results of predecessors show that,the remaining oil distribution and accumulation law in oilfield development are controlled by the static and dynamic factors of reservoir,the enclosed area of low potential is a necessary condition of forming economic movable remaining oil and the elementary unit of remaining oil accumulation,and the "the theory of positive microstructure controlling remaining oil" may not reasonably explain the new types and the new areas of remaining oil accumulation found in the practices of oilfield development.Based on these,the authors put forward "the theory of potential controlling remaining oil" and establish "dynamic accumulation modes of reforming reservoir",which provide theoretical bases for the research and development of remaining oil,and are of importance to tapping the potential of the old oilfields in our country and enhancing their recovery factors in the medium-later period of their development.
The stress of geologic research is put on the description of economic movable remaining oil distribution in the medium-later period of oilfield development,whose theoretical basis is "the theory of positive microstructure controlling remaining oil" and whose research method is "fine reservoir description".That is,the remaining oil distribution is determined by the fine portrayal of the static characters of reservoir,and this can provide the bases for the economic and feasible measures and methods of enhancing recovery factor and improving development result.The practices of oilfield development and the research results of predecessors show that,the remaining oil distribution and accumulation law in oilfield development are controlled by the static and dynamic factors of reservoir,the enclosed area of low potential is a necessary condition of forming economic movable remaining oil and the elementary unit of remaining oil accumulation,and the "the theory of positive microstructure controlling remaining oil" may not reasonably explain the new types and the new areas of remaining oil accumulation found in the practices of oilfield development.Based on these,the authors put forward "the theory of potential controlling remaining oil" and establish "dynamic accumulation modes of reforming reservoir",which provide theoretical bases for the research and development of remaining oil,and are of importance to tapping the potential of the old oilfields in our country and enhancing their recovery factors in the medium-later period of their development.
引文
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[2]李兴国.陆相储层沉积微相与微型构造[M].北京:石油工业出版社,2000.4.
[3]蒲玉国,李道轩.流体势原理在注水油田开发中的潜力区研究与应用[J].石油学报,2000,21(3):45-50.
[4]潘钟祥.石油地质学[M].北京:地质出版社,1986.98-104.
[5]荣启宏,蒲玉国.复杂断裂油田小构造研究模式[J].石油学报,2000,21(6):20-24.
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