China Petroleum Network News (Correspondent Jia Lingling) So far, the Gao 66X1 fault block carbon flooding and carbon storage test project has injected a total of 47,000 tons of gas, corresponding to 7 effective oil wells, with an average effective time of 377 days, and a daily increase of 2.7 tons per well. After gas injection, the water content of the test area dropped by 26 percentage points, and the daily increase in oil was 11 tons. So far, the cumulative increase in oil has reached 6,648 tons.
In recent years, Jidong Oilfield has targeted the development of new energy frontiers, strengthened strategic deployment, vigorously carried out CCUS pilot tests, built a negative carbon industrial cluster, and accelerated the construction of a million-ton carbon pool.
Oilfield technicians are actively carrying out research on four new technologies, including CCUS-EOR in complex fault-block reservoirs, experimental improvement of the evaluation and regulation of carbon dioxide miscible drive development effects in complex fault-block reservoirs, injection-production process optimization, and comprehensive corrosion prevention and control and carbon dioxide recycling.
Based on the characteristics of gas sources, injection and production scale, and construction status, technical personnel have deepened the research on source-sink matching, vigorously tackled supporting process technologies, established a carbon recycling technology route of "on-site gas-liquid separation, supercritical pressurization, and mixed gas injection", and formed a CCUS model with the characteristics of Jidong Oilfield.
In addition, in response to the geological risks of carbon sequestration, technical personnel combined the characteristics of the Gao 66X1 block in the test area and monitored changes in parameters such as carbon dioxide concentration, carbon flux, and water environment at four levels: above ground, surface, shallow layer, and leakage layer, forming a four-in-one carbon drive and carbon sequestration monitoring method.
