Lithologic Reservoirs ›› 2021, Vol. 33 ›› Issue (1): 37-45.doi: 10.12108/yxyqc.20210104

• PETROLEUM GEOLOGY • Previous Articles     Next Articles

Simulation of oil and gas migration pathways for Jurassic in hinterland of Junggar Basin

GUO Qiulin1, WU Xiaozhi1, WEI Yanzhao1, LIU-ZHUANG Xiaoxue1, LIU Jifeng2, CHEN Ningsheng1   

  1. 1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
    2. Beijing Tianteng Grid Technology Co, Ltd., Beijing 100095, China
  • Received:2020-07-21 Revised:2020-11-09 Online:2021-02-01 Published:2021-01-25

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Abstract: A major breakthrough was made in well Qianshao-2 in Junggar Basin in 2019,which indicates that Jurassic in the hinterland of basin has broad exploration prospects. Distant and secondary oil and gas reservoirs are developed in the hinterland of the basin. The distance between source and reservoir is large,and the hydrocarbon migration pathway determines the distribution of oil and gas reservoirs. Based on the characteristics of Jurassic oil and gas migration along the vertical direction of faults and the lateral movement along sand bodies in the study area,this paper formulated a research idea with three-dimensional geological modeling,parameter research and simulation calculation as the core,proposed a three-dimensional geological modeling method for section grids,a three-dimensional invasion percolation model considering fault factors and a quantitative model for crude oil wax content,and constructed a three-dimensional geological body for Jurassic,including 54 844 individual grids,12 370 surface grids and corresponding geological parameters. The simulation results show that the migration pathway has a good correlation with the distribution of oil and gas reservoirs,and the wax content of crude oil is close to the measured value,indicating that the simulated migration pathway is consistent with the exploration results,and the quantitative model of wax content of crude oil is effective. After comprehensively considering factors such as hydrocarbon migration pathway,oil and gas saturation and sedimentary facies distribution, five favorable areas were determined,including Cheng 1 well area,Shidong 1 well west area,Dixi 2 well area, Dong 1 well north area and Basin 6 well north area. The research results can provide a reference for the prediction of the distribution of potential exploration targets in the study area.

Key words: migration pathway, migration and accumulation modeling, 3D geological model, invasion percolation, Jurassic, Junggar Basin

CLC Number: 

  • TE122.1+2
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