this study of mercury injection curves from cores of extra low permeability reservoirs in y and z blocks in ansai oilfield shows that the reservoirs are of singular and multiple fractal natures using fractal geometric formula with two parameters 摘要利用帶有兩參數(shù)分形幾何公式對安塞油田y、z區(qū)塊特低滲儲集層巖心壓汞資料數(shù)據(jù)進行了分析,結果表明,該區(qū)塊儲集層具有單一分形和多重分形特征。