Abstract
Due to terrestrial deposited, the tight-oil-reservoir in North Songliao Basin has strong heterogeneity. In view of this characteristic, this paper studied on geology-engineering integration based on material point method, and confirmed reasonable parameters and fracturing models, to increase the efficiency of volume fracturing.
Based on seismic data and inversion results, this paper adopted nonlinear neural network intelligent discriminant method to establish equivalent fracturing model. The impact of parameters such as fracture spacing, flow rate, pum** schedule etc. on fracturing strain range was analyzed, thus confirming reasonable parameters by the optimizing strain range.
Simulated results show that strain range increases as the fracture spacing decreases from 70 m to 20 m. But while the fracture spacing decreases to 10 m, strain intensity increases whereas strain range decreases. As the flow rate increases, strain range and strain intensity increase. Stress difference has a great influence on strain range. Strain range in great stress difference area is widder than that in small stress difference area. And strain range due to inter-operation of neighboring wells is wider, compared with two neighboring wells fractured solely. The results of microseismic monitoring show that the simulated strain range has a good correspondence, which confirms the accuracy of simulation results.
In this paper, seismic data, rock mechanics and other parameters were used to simulate the fracturing parameters with material point method, which improved the application degree of geology-engineering integration. Based on simulation results, field tests were carried out, and good effects were achieved. Early oil production per well was 50.7t per day and cumulative oil production in 300 days was 4012t.
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Li, Dx., Wang, Xj., Sun, Y., Wang, W., Gu, My. (2021). Study of Geology-Engineering Integration Fracturing Design Based on Material Point Method. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2020. IFEDC 2020. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-0761-5_170
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DOI: https://doi.org/10.1007/978-981-16-0761-5_170
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