伊拉克M油田白垩系Mishrif组潟湖环境碳酸盐岩储集层成因机理

李峰峰; 郭睿; 刘立峰; 宋世琦

doi:10.3799/dqkx.2019.281

Volume 46 Issue 1

Jan. 2021

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Article Navigation > Earth Science > 2021 > 46(1): 228-241

Li Fengfeng, Guo Rui, Liu Lifeng, Song Shiqi, 2021. Genesis of Reservoirs of Lagoon in the Mishrif Formation, M Oilfield, Iraq. Earth Science, 46(1): 228-241. doi: 10.3799/dqkx.2019.281

Citation:

Li Fengfeng, Guo Rui, Liu Lifeng, Song Shiqi, 2021. Genesis of Reservoirs of Lagoon in the Mishrif Formation, M Oilfield, Iraq. Earth Science, 46(1): 228-241. doi: 10.3799/dqkx.2019.281

Li Fengfeng, Guo Rui, Liu Lifeng, Song Shiqi, 2021. Genesis of Reservoirs of Lagoon in the Mishrif Formation, M Oilfield, Iraq. Earth Science, 46(1): 228-241. doi: 10.3799/dqkx.2019.281

Citation:

Li Fengfeng, Guo Rui, Liu Lifeng, Song Shiqi, 2021. Genesis of Reservoirs of Lagoon in the Mishrif Formation, M Oilfield, Iraq. Earth Science, 46(1): 228-241. doi: 10.3799/dqkx.2019.281

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Genesis of Reservoirs of Lagoon in the Mishrif Formation, M Oilfield, Iraq

doi: 10.3799/dqkx.2019.281

1.
Petrochina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
2.
Faculty of Earth Science, China University of Petroleum, Beijing 102249, China

Received Date: 2019-11-19
Publish Date: 2021-01-15

Abstract

Abstract

In order to understand the genesis of reservoir heterogeneity in lagoon, based on core, reservoir physical property data, cast thin section and mercury injection experiment, the characteristics and genetic mechanism of reservoir of lagoon facies in the Mishrif Formation in M oilfield were studied. The results showed that the reservoirs of lagoon facies were diversified in rock types and bioclastic.The reservoir with low or extra-low permeability and wide porosity mainly developed matrix-host micropores, intercrystal line pore and moldic pore. The correlation of porosity and permeability were poor. The different diagenesis and complex sedimentation led to serious heterogeneity. The sediments in lagoon had high micrites matrix which was the fundamental of matrix-host micropores. The intercrystalline pore results from the dolomitization after bioturbation. Bioclastic which were easy to dissolve were selective dissolved to form large amount of moldic pore. It concluded that the sediment had poor physical property and the transform by diagenesis were the main reservoir genesis.The factors such as bioturbation period, extent, infill materials, environment closed or open, fluid property controlled the transform tendency to reservoir and the development and preservation of moldic pore was controlled by the bioclastic type, diagenesis sequence and environment. Based on the factors such as infill materials, bioclastic, diagenetic environment and diagenesis, the pore mode associated bioturbation and selective dissolution was established.
- carbonate rock,
- Cretaceous,
- Mishrif Formation,
- lagoon,
- bioturbation,
- dolomitization,
- petroleum geology

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References(57)

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Genesis of Reservoirs of Lagoon in the Mishrif Formation, M Oilfield, Iraq

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