PETROLEUM EXPLORATION

An analysis of major scientific problems and research paths of Gulong shale oil in Daqing Oilfield, NE China

  • SUN Longde ,
  • LIU He ,
  • HE Wenyuan ,
  • LI Guoxin ,
  • ZHANG Shuichang ,
  • ZHU Rukai ,
  • JIN Xu ,
  • MENG Siwei ,
  • JIANG Hang
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  • 1. PetroChina Daqing Oilfield Co. Ltd., Daqing 163002, China;
    2. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    3. PetroChina Exploration & Production Company, Beijing 100724, China

Received date: 2021-03-15

  Online published: 2021-05-21

Abstract

Through analysis of the problems in the production of Gulong shale oil in the Songliao Basin and the scientific exploration of the preliminary basic research, the special characteristics of Gulong shale oil in terms of reservoir space, phase distribution, flow pattern and mineral evolution are proposed, and six basic scientific problems currently faced are concluded, including: (1) The source of organic matter, mechanism of hydrocarbon generation and expulsion, and key factors affecting shale oil abundance; (2) The types and structural characteristics of effective reservoir space and their contribution to porosity and permeability; (3) The genesis and evolution of minerals and their control on reservoir availability, sensitivity and compressibility; (4) The rock mechanical characteristics and fracture propagation law; (5) The shale oil products, phase change law and main control factors of adsorption and desorption conversion; (6) The shale oil-liquid solid-liquid gas interaction mechanism and enhanced oil recovery mechanism. Three key research suggestions are proposed for realizing the large-scale economic utilization of the Gulong shale oil: (1) Deepen research on the mechanism of oil and gas generation and discharge, storage and transportation, to guide the selection of geological sweet spots of shale oil; (2) Deepen research on the compressibility and fracture initiation mechanism to support the selection of engineering sweet spots and optimization of engineering design; (3) Deepen research on the fluid action mechanism under formation conditions, to guide the optimization of development schemes and the selection of technologies for enhancing oil recovery.

Cite this article

SUN Longde , LIU He , HE Wenyuan , LI Guoxin , ZHANG Shuichang , ZHU Rukai , JIN Xu , MENG Siwei , JIANG Hang . An analysis of major scientific problems and research paths of Gulong shale oil in Daqing Oilfield, NE China[J]. Petroleum Exploration and Development, 2021 , 48(3) : 453 -463 . DOI: 10.11698/PED.2021.03.02

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