Xinjiang Petroleum Geology ›› 2020, Vol. 41 ›› Issue (5): 571-574.doi: 10.7657/XJPG20200509

• RESERVOIR ENGINEERING • Previous Articles     Next Articles

Calculation and Application of Key Combustion Parameters for Developing Heavy Oil Reservoirs: A Case Study of Wellblock H1 in Karamay Oilfield

XI Changfeng1(), ZHAO Fang1(), GUAN Wenlong1, GAO Chengguo2a, HUANG Jihong2b   

  1. 1. State Key Laboratory of Enhanced Oil Recovery, Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China
    2. PetroChina Xinjiang Oilfield Company, a. Research Institute of Exploration & Development; b.No.1 Oil Production Plant, Karamay, Xinjiang 834000, China
  • Received:2019-07-09 Revised:2020-07-15 Online:2020-10-01 Published:2020-10-10
  • Contact: ZHAO Fang E-mail:xichangfeng2007@petrochina.com.cn;zhaofang0110@petrochina.com.cn

Abstract:

Taking the combustion test in Wellblock H1 as a case, and starting from the conservation of matter and energy, the equilibrium relationship of underground combustion parameters under high-temperature combustion conditions is deduced, then the heat distribution to crude oil, rock skeleton, secondary water and other matters is analyzed in the process of combustion, and finally the parameters such as combustion temperature, air consumption, and air-to-oil ratio are calculated. The results show that in the actual production process, the air consumption of the oil layers is about 350 to 400 m3/m3, and the underground combustion temperature is about 550 °C. Based on the results, the experimental data are updated, and in order to further improve the development effect of fireflooding, the wet combustion plan is calculated. When air consumption is 350 m3/m3, the wet combustion water-to-air ratio is 0.000 779 m3/m3, and the cold water injection is 49.9 m3/d.

Key words: Karamay oilfield, in-situ combustion, energy conservation, air consumption, combustion temperature, air-to-oil ratio, wet combustion, calculation method, field application

CLC Number: