Exploration & Development of Shale Oil and Gas

Low-cost technology of Jimsar shale oil: A case study of lower “sweet spot”

  • Yun XIA ,
  • Liping ZHANG ,
  • Haoyuan CHU ,
  • Jiaqi LI ,
  • Shaoyun MA
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  • 1. Engineering Technology Research Institute, CNPC Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China
    2. College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, China

Received date: 2021-05-07

  Online published: 2021-08-19

Abstract

The Permian Lucaogou Formation in Jimsar is rich in continental shale oil reserves. There are two “sweet spot” developed in the vertical direction. As the development progresses advances, the lower “sweet spot” becomes the main development layer. It has the characteristics of large depth and strong heterogeneity, which makes the development difficult. With the impact of market environmental pressure, it is urgent to optimize the stimulation technology to realize the low-cost development of shale oil. Based on the geological characteristics, the methods of numerical simulation, experiments, and fracture monitoring are used to study the cluster spacing, sand-carrying performance of slick water, conductivity of proppant and so on. Then, a series of low-cost tests such as intensive stage, temporary plugging fracturing, quartz sand replacement, and slick water sand injection have been carried out. The application effect showed that the comprehensively use of low-cost stimulation technology can reduce the cost by at least 30 %, meanwhile, maintain the output. It provides a reference for the subsequent development for Jimsar shale oil.

Cite this article

Yun XIA , Liping ZHANG , Haoyuan CHU , Jiaqi LI , Shaoyun MA . Low-cost technology of Jimsar shale oil: A case study of lower “sweet spot”[J]. Petroleum Reservoir Evaluation and Development, 2021 , 11(4) : 536 -541 . DOI: 10.13809/j.cnki.cn32-1825/te.2021.04.009

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