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探讨适合鄂尔多斯盆地苏里格地区地质特征的相控建模方法。以苏里格气田苏14加密实验区为解剖对象,综合运用地质、测井和三维地震资料,在基于模型的测井约束反演结果基础之上,用反演波阻抗数据协同模拟泥质含量模型,进而利用泥质含量识别储层的下限标准建立岩相模型;再利用岩相模型对砂体规模和展布进行分析,并获得基于目标建模所需的各种参数;最后用基于目标体结果的方法(示性点过程法)建立高精度的三维沉积微相模型,开展不同“相控”条件下的属性模型比较分析。结果表明沉积微相控制下的属性模型中,心滩内部储层物性条件最好,其次是点坝,再次是河道微相;而以岩相控制的属性模型无法反映不同沉积微相内部储层物性参数的数学期望值与方差值,模拟结果具有较大的随机性。利用该方法所建的三维沉积微相模型可精细反映各微相的平面、剖面形态以及各微相的接触关系,其约束下的属性模型分相带反映储层的物性变化。
This paper discusses the method of phased modeling suitable for the geological characteristics of Sulige area in Ordos Basin. Taking the Su-14 Encryption Experimental Area of Sulige Gas Field as an anatomical object, based on the geologic, log and 3D seismic data, based on the model-based logging constrained inversion results, the inversion wave impedance data was used to simulate the clay content Model, and then use the shale content identification reservoir lower limit criteria to establish the lithofacies model; then use the lithofacies model sand body size and distribution analysis, and get all the parameters based on the goal of modeling; Finally, based on the target The method of volumetric results (point-point process) establishes a high-precision three-dimensional sedimentary microfacies model and conducts a comparative analysis of the attribute models under different “phased” conditions. The results show that in the attribute model under the control of sedimentary microfacies, the reservoir physical properties are the best in the heart and beach, followed by the point dam and again the channel microfacies. However, the lithofacies-controlled attribute model can not reflect the characteristics of the reservoirs in different sedimentary microfacies Mathematical expectations and variance of physical parameters, the simulation results have a greater randomness. The three-dimensional sedimentary microfacies model constructed by this method can finely reflect the plane, section morphology and the contact relationship of each micro-facies. The constrained attribute model phase-contrast zone reflects the physical properties of the reservoir.