Application of Image Processing and Discrete Analysis Method in Simulation of Oil and Gas Migration and Accumulation

Abstract

Through the simulation of oil and gas migration and accumulation, the intensity and quantity of these geological processes can be worked out quantificationally. In this approach the process and location of migration are shown visually to support the decision-making of oil and gas exploration. The model of oil and gas migration and result dynamic visual representation are two difficult problems of this method. Here three-dimensional grid discrete analysis and image processing technologies are introduced to resolve the issues respectively. The discrete analysis model in this paper takes various types of transport systems into account, including the fault and structural fracture, unconformable surface (paleo-weathering crust included), cavity, hole, gap, and connected sand bodies in clastic rock. The identification system about oil and gas migration and accumulation can be built in the grid system according to geological conditions. Based on discrete analysis model, migration path method is used to simulate the oil and gas migration, calculate the amount of oil and gas filling in heave of research area from around depressions. The results indicate that this method can be used to solve the quantitative analysis of oil and gas sources and get the direction and quantity of oil and gas migration and accumulation, which is more accurate and convenient than the traditional methods. the direction and quantity of migration and accumulation and be used to support determinant under the complex geological conditions. Image is a kind of raster data. Image processing methods has a very good correlation with discrete grid. It is easy to make conversion efficiently between them. It is convenient to generate the simulation serial maps about all the geologic periods. In this paper, 3D grid discrete analysis method is used to build the model of oil and gas migration and accumulation, and the image processing method is applied to the dynamic visualization of the results of migration and accumulation.