复杂断块地应力场数值模拟方法研究

有限元法在三维应力场的计算中具有成熟的理论基础和广泛的应用,但采用有限元软件无法精确描述诸如断层、微构造、隔夹层及严重非均质性等复杂油藏的特殊地质现象.专业地质建模软件可以建立复杂的地质模型,但建立的三维地质模型输入到油藏数值模拟软件中无法进行地应力数值模拟分析,且地质建模软件和有限元软件没有良好的数据接口.因此,要实...

Numerical simulation method for in-situ stress field in complex fault block

Finite element method has matured theory and hroad application in computing three-dimensional stress field, but has limited the ability to accurately describe the special geological phenomenon in complex reservoir, such as fault, microtectonics, restraining harrier and serious heterogeneity. Professional geological modeling software is able to establish the complex geologic model, but the established three-dimensional geological model can not conduct the analysis of in-situ stress numerical simulation in reservoir modeling software and the geological modeling software has no satisfying data interface with finite element software. In order to organically integrate geological modeling software and finite element software, it is necessary to write the interface program and to conduct the data conversion. Aiming at the geological characteristics of Nanpu Oilfield, geologicsl model was established by professional geologicsl modeling software Petrel and was transformed into finite element model by using self-edited interfacial program. The finite element model was inputted into the finite element software Abaqus and finite element numerical simulation was conducted. Finally, the three-dimensional stress field distribution of simulated domain was obtained. The procedure and method of computing complex fault block in-situ stress field is established by combining geological modeling software and finite element software.