【摘 要】
：
在油气开采过程中,随着烃类流体的不断采出,油藏内部的孔隙压力随之下降,在外部没有任何补给压力的情况下,储层压力发生衰竭是必然的。油藏的这种变化不仅对孔洞中流体的流动
【机 构】
：
西南石油大学,中石油川庆钻探工程有限公司安全环保质量监督检测研究院,中石油西南油气田分公司重庆气矿,
论文部分内容阅读
在油气开采过程中,随着烃类流体的不断采出,油藏内部的孔隙压力随之下降,在外部没有任何补给压力的情况下,储层压力发生衰竭是必然的。油藏的这种变化不仅对孔洞中流体的流动状态有影响,储层岩石的微观和宏观结构也必然会产生一定的变化,宏观表现如压实、地面沉降、套管变形,以及地层滑移、裂缝的闭合和再生等;微观表现如孔隙度和渗透率的变化、孔喉中毛管压力以及流体渗流特性的变化等。压力衰竭引发的一系列问题给钻井、完井以及开发方案的制定和调整提出了新的挑战。
During the process of oil and gas exploration, as the hydrocarbon fluid is continuously extracted, the pore pressure inside the reservoir decreases. It is inevitable that the reservoir pressure will fail if there is no external supply pressure. This change of reservoir not only affects the flow state of fluid in the hole, but also the micro and macro structures of reservoir rocks will inevitably change. The macroscopic manifestations such as compaction, land subsidence, casing deformation and strata slip , Closure and regeneration of fractures, etc .; microscopic features such as changes in porosity and permeability, capillary pressure in the pore throat, and changes in fluid seepage characteristics. A series of problems caused by pressure failure pose new challenges to the formulation and adjustment of drilling, completion and development programs.
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