基于岩石物理相分类的测井储层参数精细解释建模

研究表明,储层岩石物理相对低渗透岩性油气藏的成藏作用和油水分布具有重要的控制作用,同一种岩石物理相通常具有相似的岩性、物性、孔隙结构和含油气性特征,测井响应特征类似.在储层地质分类的基础上,根据其测井响应特征,用数学方法将鄂尔多斯盆地榆林地区上古生界山2段储层划分为3类岩石物理相,分类建立了山2段气层的测井精细解释模型和气层识别标准,从而将非均质、非线性问题转化为均质、线性问题解决.实际应用效果表明,气层的解释符合率比原来提高了17%,达到87%,利用新标准开展老井复查,建议3口井开展老井试气,均获得中高产工业气流.

The Fine Logging Interpretation Method Based on Petrophysical Faces

More fine interpretation model has to be developed to resolve the problems such as low precision and poor adaptability in routine logging interpretation models for low porous and permeable reservoirs.In low permeability reservoir,the petrophysical faces have great controlling effect on the forming of lithology reservoir and distribution of water and oil.The same petrophysical face has similar lithology,physical property,pore structure and logging response characters.Based on the reservoir's geologic classification,we divided shan-2 reservoir in Yulin gas field of Erdos basin into three petrophysical faces by mathematical method.Then we established different logging interpretation models and standards all identifying gas zones for each category.Thus we transform inhomogeneous and nonlinear problems into homogeneous and linear problems.The application showed that the interpretation agreement rate of gas zone has increased by 17 percent,up to 87 percent.According to the new standards all three oil-testing wells gained industrial airflow again.