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地震反演中约束模型的建立,特别是多井、断裂发育区的三维复杂约束模型的建立,是地震波阻抗约束反演中的关键技术环节,对反演质量有着重要影响。本文运用地震、地质综合分析方法,系统地研究了测井资料垂向井孔轨迹约束、地质层位横向控制约束、断块约束、地层沉积模式和接触关系约束等三维约束模型的关键要素。通过对胜利油田胜坨地区三维复杂区块实际约束模型的建立和反演,证明了该方法行之有效,大大提高了反演结果的精度,取得了良好的应用效果。
The establishment of the constraint model in seismic inversion, especially the establishment of three-dimensional complex constraint model of multi-well and fault zone, is the key technology link in seismic impedance constraint inversion and has an important influence on the inversion quality. In this paper, the key elements of the three-dimensional constrained model such as vertical wellbore logging constraint, lateral control constraint of geologic horizon, fault block constraint, stratigraphic sedimentary model and contact relationship constraint are systematically studied by using seismic and geological comprehensive analysis methods. Through the establishment and inversion of the actual constraint model of the 3D complex block in Shengtuo Oilfield, the method is proved to be effective and the accuracy of the inversion results is greatly improved, and the good application effect has been achieved.