基于嵌入離散裂縫的頁巖氣藏視滲透率模型
[Abstract]:Shale reservoir has different types of reservoir space, but considering different reservoir space, the evaluation model of shale reservoir permeability has not been reported. Based on the embedded discrete fracture model, the apparent permeability model of shale gas reservoir consists of four steps: (1) the spatial distribution model of natural fracture, organic matter and inorganic matter; (2) the permeability calculation method of different types of reservoir space; (3) based on the embedded discrete fracture model, combined with the spatial distribution model and permeability calculation method, the numerical simulation model is established. (4) the gas flow rate through the core under certain pressure difference is obtained by applying pressure difference at the entrance and outlet of the model, and the apparent permeability of the shale gas reservoir is obtained by using Darcy's law. The calculated results are in good agreement with the experimental values of permeability reported in the literature. Through the discussion of different factors, the results show that the contribution of natural cracks to the apparent permeability of shale gas reservoir is greater than that of inorganic and organic matter pores. Therefore, it is necessary to consider natural fractures, organic matter and inorganic pores in calculating apparent permeability of shale.
【作者單位】: 中國石油大學石油工程學院;中國石油西南油氣田分公司工程技術研究院;河南省航空物探遙感中心;河南省地礦局第一地質(zhì)環(huán)境調(diào)查院;
【基金】:國家重點基礎研究發(fā)展計劃(973計劃)項目(No.2015CB250905) 中國博士后創(chuàng)新人才支持計劃項目(No.BX201600153) 中國博士后科學基金資助(No.2016M600571) 青島市博士后應用研究項目(No.2016218)
【分類號】:TE311
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