Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq
Based on comprehensive analysis of core, cast thin section, logging and seismic data, the sedimentary and reservoir architectures of the MB1-2 sub-member of Mishrif Formation in Halfaya Oilfield, Iraq, are studied. The MB1-2 sub-member of Mishrif Formation has three types of microfacies, lagoon, bio...
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KeAi Communications Co., Ltd.
2020-08-01
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| Series: | Petroleum Exploration and Development |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S187638042060091X |
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| author | Wenju SUN Zhanfeng QIAO Guanming SHAO Xiaowei SUN Jixian GAO Peng CAO Jie ZHANG Wangang CHEN |
| author_facet | Wenju SUN Zhanfeng QIAO Guanming SHAO Xiaowei SUN Jixian GAO Peng CAO Jie ZHANG Wangang CHEN |
| author_sort | Wenju SUN |
| collection | DOAJ |
| description | Based on comprehensive analysis of core, cast thin section, logging and seismic data, the sedimentary and reservoir architectures of the MB1-2 sub-member of Mishrif Formation in Halfaya Oilfield, Iraq, are studied. The MB1-2 sub-member of Mishrif Formation has three types of microfacies, lagoon, bioclastic shoal, and tidal channel, and facies architecture controlled by sequence stratigraphy. In the 4th-order sequence, the lagoon facies aggradated vertically, and the bioclastic shoals in lenticular shape embed in the background of lagoon, the end of the sequence is incised by the “meandering river” shape tide channel, which represents the depositional discontinuity. Three types of reservoirs including tidal channel grainstone to packstone reservoirs, bioclastic shoal grainstone to packstone reservoirs and dissolved lagoon wackestone reservoirs are developed. The reservoir architectures within tidal channel and bioclastic shoal are strickly controlled by grainy facies, whereas the dissolved lagoon reservoirs controlled by both facies and dissolution are related to the sequence boundary. The reservoir sections occur mainly in the 4th sequence highstand systems tract (HST) and are separated by barriers formed in the transgressive systems tract (TST). Complicated facies architecture and dissolution modification resulted in strong heterogeneity within the reservoir, which showed the characteristics of “attic type” architecture. The results of this study can guide the development of similar reservoirs in the Middle East. |
| first_indexed | 2024-12-14T15:23:06Z |
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| id | doaj.art-858f8c7ba6164a3db6ffcdef729f33ba |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-12-14T15:23:06Z |
| publishDate | 2020-08-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Petroleum Exploration and Development |
| spelling | doaj.art-858f8c7ba6164a3db6ffcdef729f33ba2022-12-21T22:56:06ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042020-08-01474762772Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in IraqWenju SUN0Zhanfeng QIAO1Guanming SHAO2Xiaowei SUN3Jixian GAO4Peng CAO5Jie ZHANG6Wangang CHEN7PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China; China United Coalbed Methane Corp., Ltd., Beijing 100011, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, China; CNPC Key Laboratory of Carbonate Reservoir, Hangzhou 310023, China; Corresponding authorPetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, China; CNPC Key Laboratory of Carbonate Reservoir, Hangzhou 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, China; CNPC Key Laboratory of Carbonate Reservoir, Hangzhou 310023, ChinaChina United Coalbed Methane Corp., Ltd., Beijing 100011, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, China; CNPC Key Laboratory of Carbonate Reservoir, Hangzhou 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou 310023, China; CNPC Key Laboratory of Carbonate Reservoir, Hangzhou 310023, ChinaChina United Coalbed Methane Corp., Ltd., Beijing 100011, ChinaBased on comprehensive analysis of core, cast thin section, logging and seismic data, the sedimentary and reservoir architectures of the MB1-2 sub-member of Mishrif Formation in Halfaya Oilfield, Iraq, are studied. The MB1-2 sub-member of Mishrif Formation has three types of microfacies, lagoon, bioclastic shoal, and tidal channel, and facies architecture controlled by sequence stratigraphy. In the 4th-order sequence, the lagoon facies aggradated vertically, and the bioclastic shoals in lenticular shape embed in the background of lagoon, the end of the sequence is incised by the “meandering river” shape tide channel, which represents the depositional discontinuity. Three types of reservoirs including tidal channel grainstone to packstone reservoirs, bioclastic shoal grainstone to packstone reservoirs and dissolved lagoon wackestone reservoirs are developed. The reservoir architectures within tidal channel and bioclastic shoal are strickly controlled by grainy facies, whereas the dissolved lagoon reservoirs controlled by both facies and dissolution are related to the sequence boundary. The reservoir sections occur mainly in the 4th sequence highstand systems tract (HST) and are separated by barriers formed in the transgressive systems tract (TST). Complicated facies architecture and dissolution modification resulted in strong heterogeneity within the reservoir, which showed the characteristics of “attic type” architecture. The results of this study can guide the development of similar reservoirs in the Middle East.http://www.sciencedirect.com/science/article/pii/S187638042060091XIraqHalfaya OilfieldCretaceousMishrif Formationsedimentary microfaciesreservoir architecture |
| spellingShingle | Wenju SUN Zhanfeng QIAO Guanming SHAO Xiaowei SUN Jixian GAO Peng CAO Jie ZHANG Wangang CHEN Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq Petroleum Exploration and Development Iraq Halfaya Oilfield Cretaceous Mishrif Formation sedimentary microfacies reservoir architecture |
| title | Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq |
| title_full | Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq |
| title_fullStr | Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq |
| title_full_unstemmed | Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq |
| title_short | Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq |
| title_sort | sedimentary and reservoir architectures of mb1 2 sub member of middle cretaceous mishrif formation of halfaya oilfield in iraq |
| topic | Iraq Halfaya Oilfield Cretaceous Mishrif Formation sedimentary microfacies reservoir architecture |
| url | http://www.sciencedirect.com/science/article/pii/S187638042060091X |
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