缝洞型油藏流动模型的选择方法  

Method of selecting the flow model for the fracture-cavernous reservoir

作　　者：王建峰[1] 彭小龙[2] 王高旺[3] 薜师团[3] 

机构地区：[1]中国石化西北油田分公司开发处,新疆乌鲁木齐830011 [2]"油气藏地质及开发工程"国家重点实验室西南石油大学,四川成都610500 [3]中国石油青海油田公司,甘肃敦煌736202

出　　处：《油气地质与采收率》2009年第5期86-88,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家重点基础研究发展计划"973"项目"碳酸盐岩缝洞型油藏开发基础研究"(2006CB202403)

摘　　要：由于缝洞型油藏储集类型较为复杂,选择流动模型时具有随意性,使得选用的流动模型不合理,不能反映油藏的流动规律。为此,提出了根据储集体类型、特征尺度和组合关系建立流动模型的方法:①按特征尺度和分布密度将储集空间分为连续介质和不连续介质,微小的裂缝、溶洞和基岩中的孔隙为连续介质,大尺度裂缝和大尺度溶洞为不连续介质;②确定连续介质的种类,并分析不同连续介质间的窜流是否具有方向性,从而确定多重介质的介质重数;③大尺度裂缝和溶洞若被充填,运动方程采用达西定律,未被充填则采用Navier-Stokes方程。将该方案用于塔河缝洞型油藏,成功模拟了大尺度裂缝和溶洞内的产水规律。The reservoir spaces of fracture-cavernous reservoirs are very complicated. It often confused people how to choose the right flow model to research the fluids behaviors in this type of reservoir. For this reason ,a set of methods was established to select the correct models for the fracture-cavernous reservoirs based on storage type,characteristic scale,combination pattern etc. Firstly,porous media were divided into the continuous medium and discontinuous medium according to their characteristic scale and distribution density. Generally,small fractures,vugs and pores in base rocks was treated as continuous medium,but large scale of fractures and caves was treated as discontinuous medium. Secondly,the kind of the continuous medium was confirmed and whether interiority flow is orientation is analyzed,thus the medium multiplicity of the flow model will be known. Thirdly,if the large scale of fracture or caves has been backfilled,the movement equation of the flow model should be Darcy's formula,however if they have been unfilled,the movement equation should be Navier-Stokes equations. Finally the scheme was used for Tahe fracture-cavernous reservoirs,and it simulated the water production of one reservoir with large fractures and caves successfully.

关 键 词：裂缝 溶洞 渗流 模型 特征尺度 

分 类 号：TE319[石油与天然气工程—油气田开发工程]