Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (5): 50-54.doi: 10.3969/j.issn.1673-8926.2012.05.009

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Fault characteristics of Chang 9 reservoir and its impact on reservoir in Jiyuan Oilfield

CHENG Liangbing 1，2， QU Chunxia2， GOU Yongjun3， HE Youan2， WANG Jin2， WANG Fang2   

  1. 1. Department of Geology， Northwest University， Xi’an 710018， China； 2. Research Institute of Exploration and Development， PetroChina Changqing Oilfieid Company, Xi’an 710018， China； 3. No.6 Oil Production Plant， PetroChina Changqing Oilfieid Company， Xi’an 710018， China
  • Online:2012-10-20 Published:2012-10-20

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Abstract:

Formation changes and structural mutation were found in part of adjacent wells in the production process of Chang 9 reservoir in Jiyuan Oilfield. By seismic interpretation, strata correlation and core observation, 21 NWW normal faults developed in Jiyuan area were found. The time and space of Tianhuan Depression and hydrocarbon-generating peak of Chang 7 hydrocarbon-generating rocks are matched, which promotes the hydrocarbon lateral migration and accumulation, so the reservoir is relatively enriched in eastern part of the depression. The reservoir was readjusted after fault formation, which results in the destruction of reservoir belowthe faults.

Key words: PR equation of state, minimummiscibility pressure, CO2 miscible flooding, enhanced oil recovery, iterative precision

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