Petroleum Reservoir Evaluation and Development ›› 2021, Vol. 11 ›› Issue (6): 858-863.doi: 10.13809/j.cnki.cn32-1825/te.2021.06.009

• Methodological and Theory • Previous Articles     Next Articles

Study on calculation method of CO2 storage potential in depleted gas reservoir

TANG Liangrui1(),JIA Ying2,YAN Jin2,LI Guanghui3,WANG Yong1,HE Youwei1,QING Jiazheng1,TANG Yong1   

  1. 1. Petroleum Engineering School, Southwest Petroleum University, Chengdu, Sichuan 610500, China
    2. Sinopec Petroleum Exploration and Production Research Institute, Beijing 100089, China
    3. No. 7 Oil Recovery Plant, CNPC Changqing Oilfield Company, Xi’an, Shaanxi 710000, China
  • Received:2021-07-27 Online:2021-12-26 Published:2021-12-31

Abstract:

The geological sequestration of greenhouse gas, CO2, is an important means to cope with carbon peaking and carbon neutralization. However, the depleted gas reservoirs are the significant targets for the storage of CO2. Due to the different forms of CO2 in gas reservoirs, the effective CO2 storage calculation method of gas reservoirs is established based on the theoretical CO2 storage calculation method, which can be used to estimate the CO2 storage potential of the depleted gas reservoirs. Meanwhile, the model of low permeability gas reservoir is established for the CO2 storage in the later stage of the development. Considering the dissolution of CO2 in formation water and the mineralization reaction of CO2 between water and rock, the error of supercritical buried stock, dissolved buried stock and mineralized buried stock is 2.81 %, 7.37 % and 6.25 %, respectively, and the error of effective buried stock is only 3.06 % by comparing the calculated results with the numerical and analog results.

Key words: CO2 flooding, CO2 storage potential, depleted gas reservoir, numerical simulation, storage mechanism

CLC Number: 

  • TE341