The carbon dioxide miscible flooding test of the first CCUS demonstration project in the conglomerate reservoir of the Xinjiang Oilfield - the carbon dioxide miscible flooding pilot test of the Kexia Formation reservoir in the 530 well area of ??the eighth area A total of 202,300 tons of carbon have been injected and 33,300 tons of oil have been produced.
In July this year, with the commissioning of the Xinjiang Oilfield carbon dioxide miscible flooding pilot test station, the test area realized for the first time a series of key features such as integrated production liquid separation and gathering and transportation, associated gas pressurization and dehydration purification, and carbon dioxide capture, liquefaction and injection integration. With the application of technology, a series of supporting technologies and systems for carbon dioxide miscible flooding of conglomerate reservoirs have been explored. The daily oil production in the pilot area increased from 14 tons to 55 tons.
Since the “13th Five-Year Plan”, Xinjiang oil fields have selected different types of reservoirs to carry out field tests such as carbon dioxide flooding, huff and puff, and pre-fracturing. Among them, the oil reservoir in the 530 well area of ??Block 8 has strong water sensitivity. The water injection development wells cannot be injected and the oil wells cannot be produced. The water injection development effect is poor. However, the temperature of the oil reservoir is moderate and the oil saturation pressure difference is large. It can achieve miscible carbon dioxide flooding, and the reservoir is close to the gas source. It is representative of similar reservoirs and has the conditions for promotion after successful testing.
The acceleration of the carbon dioxide miscible flooding pilot test of the Kexia Formation reservoir in the 530 well area of ??Block 8 has given a strong boost to the Xinjiang Oilfield's exploration of cost-effective methods to improve recovery of developed conglomerate reservoirs and the effective utilization of newly proven low permeability reserves. Development methods, master the key technologies of the entire CCUS process, and achieve carbon emission reduction storage and low-carbon development of oil fields in the Junggar Basin.
