Special Oil & Gas Reservoirs >

2023 , Vol. 30 >Issue 1: 57 - 64

DOI: https://doi.org/10.3969/j.issn.1006-6535.2023.01.008

Geologic Exploration

Application of Volcanic Rock Reservoir Classification Method to Carboniferous System in Kebai Fault Area 1

  • Luo Xudong ,
  • Deng Shikun ,
  • Feng Yun ,
  • Tang Bin ,
  • Peng Licai ,
  • Li Xiang
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  • 1. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China;
    2. Tsinghua University, Beijing 100084, China;
    3. Anhui University of Technology, Huainan, Anhui 232001, China

Received date: 2022-04-12

  Revised date: 2022-10-24

  Online published: 2023-03-24

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Abstract

In view of the great difficulty in classifying Carboniferous volcanic rock reservoirs in Kebai Fault Area 1 and the inconsistent classification standards, eight important parameters affecting the classification of volcanic rock reservoirs in this zone are analyzed according to the drilling, logging, testing and other data. The parameters such as lithology, lithofacies, matrix porosity, fracture porosity, permeability, reservoir space type, lithofacies thickness and volcanic mechanism facies zone are assigned according to the reservoir characteristics of the research area and related reservoir classification data are calculated. Combined with the reservoir classification results of each single well, the classification method and classification standard of Carboniferous volcanic rock reservoirs in the research area are obtained. The study results show that according to the classification indicators of volcanic rock reservoirs, the Carboniferous volcanic rock reservoirs in Area 1 can be divided into three types: Type I (0.6≤RCI<1.0), Type II (0.4≤RCI＜0.6), Type (III 0.0≤RCI<0.4), among which Type I reservoirs are the best, Type II reservoirs are the better and Type III reservoirs are the worst. The research results are applied to the reservoir classification of 16 wells that are not involved in the formulation of the standard, and the accuracy rate reaches 93.8%, indicating that the classification standard is suitable for the research area. The research results have important guiding significance for the classification and prediction of Carboniferous volcanic reservoirs in this zone.

Key words： Carboniferous system in Area 1; volcanic rock; influence parameters for reservoir classification; reservoir classification method and standard; reservoir prediction; Kebai Fault

Cite this article

Luo Xudong , Deng Shikun , Feng Yun , Tang Bin , Peng Licai , Li Xiang . Application of Volcanic Rock Reservoir Classification Method to Carboniferous System in Kebai Fault Area 1[J]. Special Oil & Gas Reservoirs, 2023 , 30(1) : 57 -64 . DOI: 10.3969/j.issn.1006-6535.2023.01.008

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