天然地震促进孔隙流体迁移机制的探讨及两类模型分析
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摘要
随着当今油气勘探工作的深入,油气运移机制的研究愈发重要.近来国内外关于天然地震引起油气井产量变化,油气开采诱发地震的研究报道很多.一系列的观测事实表明强震具有巨大的地下流体运移力,天然地震对油气运移成藏有着显著的影响,很可能是多震油气藏区域油气运移的主要机制.本文从岩石骨架与孔隙流体相互耦合作用机理出发,分析较适合的固液耦合模型(包括宏观和微观模型),探讨和综述天然地震与油气二次运移成藏之间的深层次联系,提出了微宏观模型融合分析的观点,以期从震控油气二次运移的物理学机制角度为复杂多地震区域下的油气藏的勘探、开发提供理论依据和信息参考.
With the developing of the Oil and gas exploration techniques,the mechanism of oil and gas migration is becoming more and more important.In recent years,many reports show that natural earthquakes caused changes in oil and gas well production,and exploring of oil and gas induced natural earthquakes.Series of facts suggest that the earthquake have huge capacity of moving the underground fluid.The natural earthquakes have significant effects on the oil and gas migration and accumulations,is likely to be the major mechanism of hydrocarbon migration in reservoir area located in seismic zone.In this paper,we focus on the rock skeleton and porous fluid coupling mechanism,analyzes the solid-liquid coupling models(including macro and micro models).The deep relationships between natural earthquakes and hydrocarbon accumulation are discussed and reviewed.The view of fusion analysis of micro and macro models are proposed.We hope to provide some theoretical basis and reference information for the Oil and gas exploration in seismic zone through the view of the dynamic mechanism of hydrocarbon secondary migration controlled by natural earthquakes.
引文
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