Numerical evaluations on the fluid production in the in-situ conversion of continental shale oil reservoirs  

作　　者：Zhao-Bin Zhang Maryelin Josefina Briceno Montilla Shou-Ding Li Xiao Li Jian-Peng Xing Yan-Zhi Hu 

机构地区：[1]Key Laboratory of Shale Gas and Geoengineering,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China [2]Institute of Earth Sciences,Chinese Academy of Sciences,Beijing,100049,China [3]College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing,100049,China [4]Institute of Energy,Peking University,Beijing,100871,China

出　　处：《Petroleum Science》2024年第4期2485-2501,共17页石油科学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No.42090023);the Alliance of International Science Organization (ANSO)Scholarship for Young Talents;the Key Deployment Program of Chinese Academy of Sciences (YJKYYQ20190043,ZDBS-LY-DQC003,KFZD-SW-422,ZDRW-ZS-2021-3-1);the Scientific Research and Technology Development Project of China National Petroleum Corpo ration (2022DJ5503);the CAS Key Technology Talent Program;Supercomputing Laboratory,IGGCAS。

摘　　要：In-situ conversion presents a promising technique for exploiting continental oil shale formations,characterized by highly fractured organic-rich rock.A 3D in-situ conversion model,which incorporates a discrete fracture network,is developed using a self-developed thermal-flow-chemical(TFC)simulator.Analysis of the model elucidates the in-situ conversion process in three stages and defines the transformation of fluids into three distinct outcomes according to their end stages.The findings indicate that kerogen decomposition increases fluid pressure,activating fractures and subsequently enhancing permeability.A comprehensive analysis of activated fracture permeability and heating power reveals four distinct production modes,highlighting that increasing heating power correlates with higher cumulative fluid production.Activated fractures,with heightened permeability,facilitate the mobility of heavy oil toward production wells but hinder its cracking,thereby limiting light hydrocarbon production.Additionally,energy efficiency research demonstrates the feasibility of the in-situ conversion in terms of energy utilization,especially when considering the surplus energy from high-fluctuation energy sources such as wind and solar power to provide heating.

关 键 词：In-situ conversion Continental shale oil Natural fracture network TFC model 

分 类 号：TE34[石油与天然气工程—油气田开发工程]