【摘要】：伊拉克W油田Mishrif組巨厚孔隙型生屑灰?guī)r為強非均質(zhì)性儲層,孔隙結(jié)構(gòu)評價難度較大。結(jié)合薄片、孔滲試驗和壓汞毛管壓力曲線資料,使用分形理論研究儲層孔隙結(jié)構(gòu),建立了以分形維數(shù)定量評價孔隙型生屑灰?guī)r儲層孔隙結(jié)構(gòu)的方法和標(biāo)準(zhǔn)。該儲層孔隙結(jié)構(gòu)分形特征可分為2類,第1類儲層孔隙結(jié)構(gòu)整體具有顯著的"單段型"分形特征;第2類儲層孔隙結(jié)構(gòu)整體分形特征不顯著,但其較大孔喉系統(tǒng)和較小孔喉系統(tǒng)各自具有顯著的分形特征,即"多段型"分形特征。分形維數(shù)能夠反映孔隙型灰?guī)r孔隙結(jié)構(gòu)的復(fù)雜程度和非均質(zhì)性,分形維數(shù)越大,孔隙結(jié)構(gòu)越復(fù)雜;壓汞毛管壓力和含水飽和度分段越多,孔隙結(jié)構(gòu)非均質(zhì)性越強。利用孔隙結(jié)構(gòu)分形維數(shù)的分區(qū)性對儲層進行分類,同一類樣品壓汞毛管壓力曲線的相似性驗證了分形維數(shù)分類結(jié)果的合理性。Ⅰ類與Ⅱ類儲層多對應(yīng)"多段型"分形特征,Ⅲ類與Ⅳ類儲層多對應(yīng)"單段型"分形特征。該研究成果對相同類型碳酸鹽巖儲層孔隙結(jié)構(gòu)定量評價具有指導(dǎo)意義。
[Abstract]:The Mishrif formation of Mishrif formation in Iraq is a strong heterogeneous reservoir, and it is difficult to evaluate the pore structure. Combined with thin slice, pore permeability test and mercury injection capillary pressure curve data, the fractal theory is used to study the pore structure of the reservoir, and the method and standard for quantitative evaluation of pore structure of the pore type limestone reservoir are established by using fractal dimension. The fractal characteristics of pore structure of the reservoir can be divided into two categories, the first type of reservoir pore structure as a whole has a significant "single-segment" fractal characteristics, the second type of reservoir pore structure overall fractal characteristics are not significant, However, the larger pore throat system and the smaller pore throat system each have significant fractal characteristics, that is, "multi-segment" fractal characteristics. Fractal dimension can reflect the complexity and heterogeneity of pore structure of porous limestone. The larger the fractal dimension is, the more complex pore structure is, and the more mercury capillary pressure and water saturation are, the stronger the heterogeneity of pore structure is. The reservoir is classified by using the fractal dimension of pore structure. The similarity of mercury capillary pressure curve of the same kind of sample verifies the rationality of the classification result of fractal dimension. The type 鈪，

本文編號：2154013