Study on Simulation Method of Multi-scale Fractures in Low Permeability Reservoirs

doi:10.11885/j.issn.16745086.2016.06.25.03

Abstract

Abstract: The flow of fluids in low permeability reservoirs displays typical multi-scale mechanical behavior across dense matrices, natural fractures, hydraulic fractures, and wellbores. Studying the classification of the scale of fractures in reservoirs, establishing an accurate multi-scale fracture model in low permeability reservoirs, and exploring the cascade coupling process and internal correlations between multi-scales are the keys to the study of seepage flow in low permeability reservoirs and provide an important theoretical basis for effective recovery from low permeability reservoirs. Based on the multi-scale correlation method of complex disciplines and the relevant literature on multi-scale fracturing modeling of reservoirs, the scale classification criteria of multi-scale fractures in reservoirs are proposed. In addition, the multi-scale correlation method and multi-scale fracture model in low permeability reservoirs are summarized. The advantages and disadvantages of several representative models constructed from a continuous media perspective and a discrete media perspective were analyzed. Based on the study's results, recommendations for constructing the multi-scale model of reservoir fractures are proposed and the research trend of multi-scale fracture modeling in low permeability reservoirs is pointed out.

Key words: low permeability reservoir, multi-scale fractures, mathematical model, multi-scale correlation, characterization method

CLC Number:

TE348

LIU Jianjun, WU Mingyang, SONG Rui, HUANG Liuke, DAI Xiaojun. Study on Simulation Method of Multi-scale Fractures in Low Permeability Reservoirs[J]. 西南石油大学学报(自然科学版), 2017, 39(4): 90-103.

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