Discrete Fracture Network Modelling in a Naturally Fractured Carbonate Reservoir in the Jingbei Oilfield, ChinaReport as inadecuate


Discrete Fracture Network Modelling in a Naturally Fractured Carbonate Reservoir in the Jingbei Oilfield, China


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1

Key Laboratory of Tectonics and Petroleum Resources China University of Geosciences, Ministry of Education, Wuhan 430074, China

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Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

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School of Earth and Environmental Sciences, University of Queensland, St. Lucia QLD 4072, Australia

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School of Environmental Studies, China University of Geosciences, Wuhan 430074, China





*

Authors to whom correspondence should be addressed.



Academic Editor: Jacek Majorowicz

Abstract This paper presents an integrated approach of discrete fracture network modelling for a naturally fractured buried-hill carbonate reservoir in the Jingbei Oilfield by using a 3D seismic survey, conventional well logs, and core data. The ant tracking attribute, extracted from 3D seismic data, is used to detect the faults and large-scale fractures. Fracture density and dip angle are evaluated by observing drilling cores of seven wells. The fracture density distribution in spatiality was predicted in four steps; firstly, the ant tracking attribute was extracted as a geophysical log; then an artificial neural network model was built by relating the fracture density with logs, e.g., acoustic, gamma ray, compensated neutron, density, and ant tracking; then 3D distribution models of acoustic, gamma ray, compensated neutron and density were generated by using a Gaussian random function simulation; and, finally, the fracture density distribution in 3D was predicted by using the generated artificial neural network model. Then, different methods were used to build the discrete fracture network model for different types of fractures of which large-scale fractures were modelled deterministically and small-scale fractures were modelled stochastically. The results show that the workflow presented in this study is effective for building discrete fracture network models for naturally fractured reservoirs. View Full-Text

Keywords: discrete fracture network model; ant track; artificial neural network; buried-hill reservoir discrete fracture network model; ant track; artificial neural network; buried-hill reservoir





Author: Junling Fang 1,2, Fengde Zhou 1,2,3,* and Zhonghua Tang 4,*

Source: http://mdpi.com/



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