Ture three-dimensional fracture simulation of geology-engineering integration in low permeability and tight reservoirs in southern of Ordos Basin

Abstract

In view of the characteristics of the Mesozoic oil reservoirs in the southern Ordos block such as large buried depth, strong heterogeneity, unclear understanding of oil and gas distribution, and immature prediction technology for engineering construction mechanism and effects, the fracture propagation morphology is studied. The 3D geomechanical parameters are truly 3D distributed by the integrated fracturing simulation technology of geological engineering and the research results of reservoir evaluation and rock mechanics. The spatial distribution of rock mechanics parameters of tight sandstone reservoir and interlayer is accurate. Considering the heterogeneity between layers, the distribution law of true 3D fractures in the real formation environment of high temperature and high pressure is simulated. The simulation results show that the fractures simulated by the 3d geomechanical model updated in real time are irregular and asymmetrical, and have a high degree of matching with the seismic data. This fracture model can guide the field construction and optimize the fracturing parameters of subsequent Wells to ensure that fractures occur in the most favorable position, which has high practical value and economic benefits.