Session: 11-08-01 Advances in Carbon Capture Utilization and Storage (CCUS)

Paper Number: 127862

127862 - Optimization of Co2 Water-Gas Alternating Injection-Production Parameters in Low Permeability Reservoirs 

The reservoir heterogeneity of low permeability reservoir is strong, and it is easy to form fingering phenomenon in the process of continuous water injection or gas injection development. The use of CO₂ water-gas alternation technology can not only make full use of the advantages of CO₂ flooding, but also effectively reduce the fingering phenomenon and improve the development effect. However, due to the unreasonable parameters such as injection speed, slug size and gas-water ratio, CO₂ breaks through prematurely in production wells or fails to achieve the expected development effect. Therefore, it is necessary to study the optimization of CO₂ water-gas alternating injection-production parameters in low permeability reservoirs. Based on the actual formation and fluid characteristics of A oilfield, the reservoir numerical simulation method is used to optimize the injection-production parameters of CO₂ water-gas alternating flooding in this area. The results show that the development effect is the best when the water injection is first followed by gas injection, the gas injection rate is 0.08PV / year, the water-gas ratio is 1:2, and the alternating period is 3 months, and the recovery rate is 42.15 %. The research results have a strong reference significance for improving the mining effect of A oilfield.

Presenting Author: Leng Tian China University Of Petroleum - Beijing (cup)

Presenting Author Biography: Tian Leng, Professor of China University of Petroleum ( Beijing ), doctoral supervisor, main research directions : unconventional oil and gas seepage theory and application, oil and gas field development theory and system engineering, won the first prize for scientific and technological progress of China Petroleum and Chemical Industry Federation in 2021. In 2021, it won the second prize of the excellent publication ( textbook award ) of China Petroleum and Chemical Automation Application Association.

Authors:

Leng Tian China University Of Petroleum - Beijing (cup)
Wenkui Huang China University Of Petroleum - Beijing (cup)
Chuanyi Tang Baikouquan Oil Production Plant, PetroChina, Xinjiang Oilfield Company
Hui Tian Baikouquan Oil Production Plant, PetroChina, Xinjiang Oilfield Company
Long Peng School of Petrochemical Engineering and Environment, Zhejiang Ocean University, Zhoushan
Mingliang Li CNOOC Tianjin Branch