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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2016  >  38(3): 360-365
Zhang Yikai, Kang An, Min Xiaogang, Li Zhiming, Li Weichao, Gao Huijun. Characteristics and genesis of carbonate reservoirs in the Mishrif MB21 member in the Missan oil fields, Iraq[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2016, 38(3): 360-365. doi: 10.11781/sysydz201603360
Citation: Zhang Yikai, Kang An, Min Xiaogang, Li Zhiming, Li Weichao, Gao Huijun. Characteristics and genesis of carbonate reservoirs in the Mishrif MB21 member in the Missan oil fields, Iraq[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2016, 38(3): 360-365. doi: 10.11781/sysydz201603360
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Characteristics and genesis of carbonate reservoirs in the Mishrif MB21 member in the Missan oil fields, Iraq

doi: 10.11781/sysydz201603360

  • CNOOC Iraq Limited, CNOOC International Limited, Beijing 100028, China

  • Received Date: 2015-08-20
  • Rev Recd Date: 2016-03-17
  • Publish Date: 2016-05-28
    Abstract
  • The characteristics and genesis of carbonate reservoirs in the Mishrif MB21 member in the Missan oil fields were studied based on core, well logging, seismic and production data. The reservoirs were mainly deposited in a carbonate open platform sedimentary environment, and developed several subfacies such as bioclastic shoals, bioherms and open subtidal deposits. Rudist grainstones, skeletal grainstones, skeletal peloidal grainstones and skeletal peloidal packstones were found. Primary intergranular pores, secondary dissolution pores, mouldic pores, micro-pores associated with matrix, a small quantity of micro-vuggy and micro-fractures provided space for hydrocarbon accumulation. Controlled by deposition and diagenesis, reservoir distribution was similar laterally, but varied obviously vertically and showed a strong heterogeneity, which restricted oil development.

     

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