A Geological Modeling Method for Dual Porous Reservoirs in Granite Buried Hills

doi:10.11885/j.issn.1674-5086.2018.04.28.01

Abstract

Abstract: Fractured oil reservoirs in granite buried hills are influenced by tectonic motion, weathering, and corrosion. Since layers in these reservoirs are dual porous, geological modeling of these layers has been a difficult task but is also an important topic in the field. Hence, this work combines logging, seismic, core, and well testing data to thoroughly investigate the causes of fracturing. It is determined that faults and "gully ridge" landforms are the major factors that determine the fracture distribution in the region. Subsequently, the discrete fracture network (DFN) modeling technique was used to develop a geologic model for the fracture mechanism in the granite buried hills. Fracture distributions are created and used as a constraint to form a fracture network model for the granite buried hills. An equivalent fracture attribute model was obtained and its reliability was tested using information such as well logging and testing data. A geological method for the granite buried hills in the Bohai A Oilfield was constructed using this method. This model better characterizes the fracture distribution in the oil field and provides a foundation for formulating exploration plans.

Key words: granite buried hills, geological modeling, dual medium, fracture modeling, DFN modeling technique

CLC Number:

TE122

PAN Xiaoqing, SONG Laiming, NIU Tao, ZHANG Yuqing, GAO Yufei. A Geological Modeling Method for Dual Porous Reservoirs in Granite Buried Hills[J]. 西南石油大学学报(自然科学版), 2019, 41(4): 33-44.

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