Special Oil & Gas Reservoirs >

2024 , Vol. 31 >Issue 3: 61 - 69

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.03.008

Geologic Exploration

A Calculation Method of Deep Tight Reservoir Saturation Based on Acoustic Parameters and Pore Structure Classification

  • Yuan Long ,
  • Liu Wenqiang ,
  • Luo Shaocheng ,
  • Wang Qian ,
  • Li Nan ,
  • Cao Yuan
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  • China National logging Corporation, Xi′an, Shaanxi 710021, China

Received date: 2023-04-15

  Revised date: 2024-03-01

  Online published: 2024-07-26

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Abstract

Deep tight reservoirs present intricate geological conditions, posing challenges in accurately calculating gas saturation. To address the issue, the structural belt of northern Kuqa in Tarim Basin is taken as an example. Based on the theories of rock conductivity and acoustics, using petrophysicaltesting methods and data analysis techniques, combined with mercury intrusion porosimetry and nuclear magnetic resonance data, the reservoirs are divided into four categories based on their pore structures.According to the parameters of rock fractures, the relation equation between water saturation and acoustic parameters at different conditions of pore structures is established. An innovative saturation calculation model based on acoustic parameters and pore structure classification has been developed. According to the research results, compared with Archie equation of electrical petrophysical variations in rocks and Gassmann-Wood saturation equation, the simulator better matched with the test data. This method has proven to be feasible. The method provides a new approach to calculate the saturation of deep tight reservoirs using non-electric logging data, and promote efficient exploration and development in deep tight gas reservoirs.

Key words： deep tight reservoir; water saturation; acoustic parameters; pore structure; Gassmann-Wood equation

Cite this article

Yuan Long , Liu Wenqiang , Luo Shaocheng , Wang Qian , Li Nan , Cao Yuan . A Calculation Method of Deep Tight Reservoir Saturation Based on Acoustic Parameters and Pore Structure Classification[J]. Special Oil & Gas Reservoirs, 2024 , 31(3) : 61 -69 . DOI: 10.3969/j.issn.1006-6535.2024.03.008

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