Resource assessment of tight oil from the Permian Lucaogou Formation in Jimusar Sag,Junggar Basin,China

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  • 1.Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;
    2.Research Institute of Petroleum Exploration and Development,PetroChina Xinjiang Oilfield Company,
    Karamay 834000,China;3.Research Institute of Petroleum Experiment and Detection,
    PetroChina Xinjiang Oilfield Company,Karamay 834000,China

Received date: 2016-04-16

  Revised date: 2016-06-09

  Online published: 2019-09-11

Abstract

In recent years,significant progress has been made on the exploration of tight oil by the PetroChina Xinjiang Oilfield Company,further driving the exploration of unconventional petroleum in China.Reservoirs of the tight oil from the Middle Permian Lucaogou Formation in Jimusar Sag of the Junggar Basin are composed of muddy siltstone,dolomite siltstone and sandy dolomite.They vertically developed in two sections:the upper section (consisting of siltstone) and the lower section (consisting of lacustrine dolomite rocks),showing typical characteristics of saline-lacustrine sediments.High-quality source rocks commonly developed in the Middle Permian Lucaogou Formation and tight reservoirs are distributed in a large area continuously with giant reservoir space,of which have vertically alternating-relationship and laterally continuous distribution.Accumulation of tight oil is mainly controlled by the distribution of source rocks,reservoir property and oil saturation,enriching in the tight reservoir section.Based on geological characteristics of tight oil described above,a precise integration method (the small patch method and EUR analogy method) was applied to assess the low and upper tight oil resources with a sum of 2 billion tons in place and 0.115 billion tons of the technically recoverable resources (TRR).Among them,the type Ⅰ resource reaches up to 0.25 billion tons in place and 0.016 billion tons of TRR as available resources.The tight oil in Jimusar Sag,as typical saline-lacustrine tight oil,was analyzed about the geological and resource assessment parameters,providing a classic example of the integrated resource assessment of unconventional petroleum for others.

Cite this article

Qiu Zhen, Wu Xiao-zhi, Tang Yong, Zheng Min, Wang Gui-jun, Guo Qiu-lin, Wang She-jiao, Xie Hong-bing . Resource assessment of tight oil from the Permian Lucaogou Formation in Jimusar Sag,Junggar Basin,China[J]. Natural Gas Geoscience, 2016 , 27(9) : 1688 -1698 . DOI: 10.11764/j.issn.1672-1926.2016.09.1688

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