Special Oil & Gas Reservoirs >

2024 , Vol. 31 >Issue 4: 81 - 88

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.04.010

Geologic Exploration

Method of Determining the Upper Limit Pressure of Gas Storage Operation and Its Application in the Banzhongbei Gas Storage

  • Yan Ping ,
  • Jin Yejun ,
  • Yuan Xuehua ,
  • Su Hesong ,
  • Chang Jinyu ,
  • Zeng Jingbo ,
  • Zhang Fengsheng ,
  • Cai Hongbo
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  • 1. China National Logging Corporation, Xi'an, Shaanxi 710077, China;
    2. Northeast Petroleum University, Daqing, Heilongjiang 163318, China;
    3. PetroChina Dagang Oilfield Company, Tianjin 300280, China;
    4. PetroChina Liaohe Oilfield Company, Panjin, Liaoning 124010, China

Received date: 2023-09-12

  Revised date: 2024-04-03

  Online published: 2024-09-20

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Abstract

The Banzhongbei Gas Storage in the Dagang Oilfield is located on the upcast side of the Banqiao Fault, which is a fault block gas storages and a semi-anticlinal structure cut by faults. The loading capacity of faults and capping formation determines the high limit pressure for the gas storage operation. To address the lack of consideration of mechanical integrity in determining the upper limit pressure of gas storage operation, this study evaluates the hydraulic sealing ability of the cap rock and the stability of faults in the study area from the perspective of geomechanics. This evaluation is based on comprehensive data including 3D seismic interpretation results, XMAC logging stress interpretation results, and rock mechanics tests. It utilizes the theory of rock brittle fracture to determine the upper limit pressure for the safe operation of gas storage considering mechanical integrity. The results show that the upper limit pressure of the hydraulic sealing capacity of the cap rock in the Banzhongbei Gas Storage is 39.30 MPa, and the weak point of fault stability is at the intersection of two faults with a minimum activation pressure of 30.57 MPa. By considering the upper limit of cap rock hydraulic sealing capacity and fault stability, the upper limit pressure for the operation of the Banzhongbei Gas Storage is determined to be 30.57 MPa, which is reasonably close to the design operating upper limit pressure of 30.50 MPa. The research findings have significant guiding for the design of upper limit pressure for gas storage operation.

Key words： cap rock; hydraulic sealing capacity; fault stability; high limit pressure; Banzhongbei Gas Storage; Dagang Oilfield

Cite this article

Yan Ping , Jin Yejun , Yuan Xuehua , Su Hesong , Chang Jinyu , Zeng Jingbo , Zhang Fengsheng , Cai Hongbo . Method of Determining the Upper Limit Pressure of Gas Storage Operation and Its Application in the Banzhongbei Gas Storage[J]. Special Oil & Gas Reservoirs, 2024 , 31(4) : 81 -88 . DOI: 10.3969/j.issn.1006-6535.2024.04.010

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