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Research on Whole Strata Geological Modeling Technology for CO2 Geological Storage in Salt Water Layer
Yuan Zhe, Ren Peigang, Liu Jinhua, Xie Bingxi, Tian Shouceng, Yang Huiting
PDF(5705 KB)
PDF(5705 KB)
Research on Whole Strata Geological Modeling Technology for CO2 Geological Storage in Salt Water Layer
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The CO2 geological storage technology in salt water layer is an important supporting technology for achieving China’s carbon peaking and carbon neutrality goals. However, the current 3D geological modeling technology based on oil and gas development purposes is difficult to meet the requirements of CO2 geological storage. Numerical simulation and safety evaluation of CO2 geological storage in salt water layers require a geological model of all strata from the ground to the target layer. Taking the Gaoji area of the Subei basin as an example, using Petrel software and various deterministic and stochastic modeling methods, it conducted research on the three-dimensional modeling technology of the entire strata from the target strata to the surface. The main achievements are as follows. Propose to use the Structural framework method to solve various fault modeling problems caused by complex fault contact relationships, and use the stepped grid method to solve the grid requirements for whole formation modeling. Propose a method of sequentially simulating porosity, permeability, and other models using different geostatistical methods under the constraint of lithological models，and ensure that the number of grids in the entire geological model is less than ten million. Based on the characteristics of the geological model of the entire formation, the accuracy of the geological model of the entire formation in the Gaoji area was tested using the comparison method of reservoir development characteristics. Overall, it is believed that the results of the random modeling in the Gaoji area have high credibility. The geological modeling method proposed in this study can provide a reliable and complete geological model for the numerical simulation and safety inspection of CO2 geological storage in salt water layers, which is of great significance for the development of CO2 geological storage in salt water layers.
carbon / CO2 geological storage / salt water layer / geological modeling / Gaoji area / Subei basin / petroleum geology
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