Author/Authors :
Niu، Baolun نويسنده Production Engineering and Technology Institute, Zhongyuan Oilfield Branch Company, Sinopec, Puyang,Henan 457001, P. R. of China , , Deng، Ruijian نويسنده Production Engineering and Technology Institute, Zhongyuan Oilfield Branch Company, Sinopec, Puyang,Henan 457001, P. R. of China , , Lin، Yiqing نويسنده School of Foreign Languages, Xian Shiyou University, Xian, Shaanxi Province, 710065, P. R. China , , Zhang، Zhang نويسنده Production Engineering and Technology Institute, Zhongyuan Oilfield Branch Company, Sinopec, Puyang,Henan 457001, P. R. of China , , Yang، Changhua نويسنده Production Engineering and Technology Institute, Zhongyuan Oilfield Branch Company, Sinopec, Puyang,Henan 457001, P. R. of China , , Zhou، Xun Yu نويسنده , , Ren، Shaoran نويسنده School of Petroleum, China University of Petroleum, Qingdao, Shandong province, 266580, PR of China , , Li، Zhaomin نويسنده School of Petroleum, China University of Petroleum, Qingdao, Shandong province, 266580, PR of China ,
Abstract :
CO2 injection is an effective technique for improved oil recovery in light oil reservoirs, especially for
water flooding abandoned reservoirs. In this study, the lower part of Es1 reservoirs in Pucheng
oilfield was introduced as the target reservoir. By studying the minimum miscible pressure in CO2
flooding, the reservoir could achieve miscible flooding. Long core displacement experiments proved
that water alternating CO2 flooding could significantly improve the recovery. For the reservoir
characteristics, anti-corrosion technology in the process of injection was researched, and the H-20
inhibitor was screened. A channeling blocking agent in combination with the delayed expansion of
gel particles and cross-linked copolymer was used to control the gas fluidity. The Pu 1-1 well groups
were optimized to conduct a field trial. The cumulative injected liquid CO2 was 19219.95 ton, 0.248
PV and the cumulative increasing oil was 4520.9 t. The predicted recovery will increase by 8.3%.
The successful implementation of the project can provide technical attempt for completion of
energy to succeed and energy-saving emission reduction targets.
