Journal of Petroleum Science and Technology

Journal of Petroleum Science and Technology

RESEARCH ON CO2 FLOODING FOR IMPROVED OIL RECOVERY IN WATER FLOODING ABANDONED RESERVOIRS

Document Type : Research Paper

Authors
Baolun Niu 1
Ruijian Deng 2
Yiqing Lin 3
Xinrong Wu 1
Zhang Zhang 4
Changhua Yang 1
Weidong Yang 1
Zhaomin Li 5
Shaoran Ren 6
1 Production Engineering and Technology Institute, Zhongyuan Oilfield Branch Company, Sinopec, Puyang, Henan 457001, P R of China
2 Zhongyuan Oilfield Branch Company, Sinopec, Puyang, Henan 457001, P R of China
3 School of Foreign Languages, Xi'an Shiyou University, Xi'an, Shaanxi Province,710065, P. R. China
4 Oil and Gas Development Company, Zhongyuan Petroleum Engineering Company, Sinopec, Puyang, Henan 457001, P R of China
5 School of Petroleum Engineer, China University of Petroleum, Qingdao, Shandong Province, 266580, PR of China
6 School of Petroleum, China University of Petroleum, Qingdao, Shandong province, 266580, PR of China
10.22078/jpst.2014.402
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.
Keywords
Gas Injection
IOR
Water Alternating CO2 Injection
CO2 Corrosion
CO2 Foam
      [1]     Wassmuth F. R., Green K., and Hodgins L., “Conformance Control for Miscible CO2 Floods in Fractured Carbonates,” SPE 2005, 243, 2005.
      [2]     Dengen Z., Meisong Y., and Marc C., “Optimization of a Mature CO2 Flood from Continuous Injection to WAG.” SPE 154181-MS, 2012.
      [3]     Bian Y., Penny G., and Sheppard N. Court., “Surfactant Formulation Evaluation for Carbon Dioxide Foam Flooding in Hetero-geneous Sandstone Reservoir,” SPE 154018-MS, 2012.
 
      [4]     Di Julio S. S. and Emanuel A. S., “Laboratory Study of Foaming Surfactant for CO2 Mobility Control,” SPE 16373-PA., 1989, 136-142.
      [5]     Casteel J. F. and Djabbarah N. F., “Sweep Improvement in CO2 Flooding by Use of Foaming Agents,” SPE 14392-PA., 1988, 267-274.