Journal of Southwest Petroleum University(Science & Technology Edition) ›› 2023, Vol. 45 ›› Issue (2): 135-144.DOI: 10.11885/j.issn.1674-5086.2021.06.18.01

• OIL AND GAS ENGINEERING • Previous Articles     Next Articles

Design of Operating Parameters in MB8 Gas Storage with Edge and Bottom Water

GONG Ruicheng1, WANG Aiming2, CHEN Fangfang2, YU Haitao3, LIU Jingun1   

  1. 1. No.2 Gas Production Plant, Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736200, China;
    2. Exploration and Development Research Institute, Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736200, China;
    3. No.3 Gas Production Plant, Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736200, China
  • Received:2021-06-18 Published:2023-05-05

Abstract: The edge-bottom water will affect the injection and production capacity and peak production of gas wells during gas storage operation. There are few cases of underground gas storage building from medium-strength edge-bottom water gas reservoirs at home and abroad. In accordance with the medium intensity edge-bottom water in Wellblock MB8, the formation water will make influence on storage capability when building a gas storage. We evaluate well type by optimizing of gas-water characteristics of injection-production wells, assess gas storage capacity by material balance equation of water drive gas reservoir, analyze well injection-production capacity considering gas-water two phase seepages, and study edge-bottom water transport conditions in the process of injection-production with numerical simulation method. The study shows that it is feasible to transform underground gas storage in Wellblock MB8, and the influence of edge and bottom water on gas storage operation can be reduced by increasing the number of wells, reducing the injection and production of single well, and by optimizing the well location. Considering the influence of edge and bottom water, the effective working gas in MB8 gas storage is 170 million cubic meters, the reasonable number of injection and production wells is 20, and the operating pressure range from 8.1$\sim$10.9 MPa.

Key words: gas storage, edge and bottom water gas reservoirs, operating parameters, injection-production capability, storage capacity

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