西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (2): 23-32.DOI: 10.11885/j.issn.1674-5086.2018.06.04.03

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Geological Characteristics and Development Strategies of Fractured Tight Oil Reservoirs in Jinghe Oilfield

LIU Zhongqun   

  1. Exploration & Production Research Institute, SINOPEC, Haidian, Beijing 100083, China
  • Received:2018-06-04 Online:2019-04-10 Published:2019-04-10

Abstract: Based on the geological characteristics and the development perspectives, this paper discusses the challenges in the exploration of fractured tight oil reservoirs, and proposes strategies for the development of their exploitation. The work, based on results from the Jinghe Oilfield, provides a reference for the development of oil fields of the same type. The Jinghe oil field is a dense reservoir with fine pore structure, poor connectivity, and a low percentage of movable fluids. Such structure, as well as the horizontal layered fractures, are the main factors controlling the yield of the reservoir. The reservoirs can be divided into four types, among which types I and Ⅱ are" sweet spots", and are characterized by a strong heterogeneity, low thickness, low porosity, low oil saturation, and low abundance. The wells have a low production, large difference in the production capacity, rapid decline in the production, low cumulative production, and low recovery capability. It is highly difficult to economically develop the reservoir. The issues in its development include the difficulty in accurately locating the " sweet spots", improving the controllable reserves, improving the recovery rate, and in performing energy injection. Six development strategies are proposed, to address the development difficulties specifically, namely:a "discontinuous" well location deployment, a segmental fracturing of horizontal wells, a rolling construction and production, the optimization of reservoir engineering parameters, the implementation of pilot tests for energy injection, and the implementation of low-cost procedures.

Key words: tight oil reservoir, fracture, geological character, development strategies

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