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引言目前用以处理碳酸盐岩油气层测井资料的数学模型是以均匀孔隙概念为基础。这种概念认为岩石孔隙的几何形状和分布都较均一,它们饱和流体的性质及对流体的渗滤作用也相同。当地层被钻井打开后,泥浆滤液均匀地浸入渗透性地层。从而在地层径向上造成冲洗带、浸入区、原状地层等不同部位的电性差异。用岩性、孔隙度测井系列,可以求得地层孔隙度和渗透率。用不同探测深度的电阻率测井系列,通过阿尔奇公式可以求得地层含水饱和度和冲洗带含水饱和度,并由此而算出残余油、可动油等参数。
INTRODUCTION The mathematical models currently used to process log data from carbonate reservoirs are based on the concept of uniform porosity. This concept assumes that the rock pores are more uniform in geometry and distribution, and their saturated fluid properties and fluid percolation are the same. After the formation is drilled, the mud filtrate is evenly impregnated into the permeable formation. Resulting in the stratigraphic radial direction of the washing zone, immersion zone, the original formation of different parts of the electrical differences. Using lithology and porosity log series, the formation porosity and permeability can be determined. Resistivity log series with different exploration depths can be used to calculate the water saturation of formation and the water saturation of the flushed zone by using the Archie formula and calculate the parameters of residual oil and movable oil.