Features of the Early Hydrocarbon Accumulation and Its Effects on the Late Accumulation in Sandstone Reservoir: A Case Study of the Eocene Dongying Depression, Bohai Bay Basin
Multi-stage hydrocarbon generation and accumulation are very common in petroliferous basins. Also, determination of hydrocarbon accumulation stages and each related diagenetic feature is important for understanding the distribution of current oil and gas resources in one individual basin. However, i...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-05-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.915747/full |
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| author | Miao Wang Miao Wang Yong Chen Yong Chen Guoqi Song Huimin Liu Yongshi Wang Pengfei Zhang Yibo Qiu Tao Chen Jiyan Li Xinjin Liu Peng Liu Yuelin Feng Hui Zhang Hui Zhang Qian Huang Qian Huang Yelei Wang Yelei Wang |
| author_facet | Miao Wang Miao Wang Yong Chen Yong Chen Guoqi Song Huimin Liu Yongshi Wang Pengfei Zhang Yibo Qiu Tao Chen Jiyan Li Xinjin Liu Peng Liu Yuelin Feng Hui Zhang Hui Zhang Qian Huang Qian Huang Yelei Wang Yelei Wang |
| author_sort | Miao Wang |
| collection | DOAJ |
| description | Multi-stage hydrocarbon generation and accumulation are very common in petroliferous basins. Also, determination of hydrocarbon accumulation stages and each related diagenetic feature is important for understanding the distribution of current oil and gas resources in one individual basin. However, in the case of conventional sandstone reservoirs, few studies have focused on these resulting reservoir features (e.g., physical property and wettability) that are caused by the first accumulation of hydrocarbons and their geological implications. In this study, taking the reservoir from the Eocene Dongying Depression as an example, we investigated the features of the early hydrocarbon accumulation and its effects on the late accumulation, by analyzing the early accumulation-related paragenesis, fluid inclusions, clay minerals content, reservoir physical property, and wettability in sandstones. Our results show that the early stage accumulation of the overpressured hydrocarbon fluid could support and offset some loads of overburden, weaken the normal compaction, and preserve some original pores. Also, the early hydrocarbon accumulation resulted in an alternated, diagenetic fluid environment from the initial acidic to subsequent alkalic conditions, with the overall dissolution intensity stronger than the cementation, and formed a large number of secondary pores. As a result, the early accumulation was beneficial to reservoir space development and provided more space for the late hydrocarbons. In addition, the early hydrocarbon accumulation could cause the alteration of rock wettability and gradually formed a lipophilic migration pathway from the source rock to the reservoir. Also, the late stage of hydrocarbons would preferentially choose this dominant pathway for their migration (i.e., inheritance of migration pathway). |
| first_indexed | 2024-12-12T05:18:50Z |
| format | Article |
| id | doaj.art-0211c6ad63674ac19389b45fa053775b |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-12T05:18:50Z |
| publishDate | 2022-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-0211c6ad63674ac19389b45fa053775b2022-12-22T00:36:40ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-05-011010.3389/feart.2022.915747915747Features of the Early Hydrocarbon Accumulation and Its Effects on the Late Accumulation in Sandstone Reservoir: A Case Study of the Eocene Dongying Depression, Bohai Bay BasinMiao Wang0Miao Wang1Yong Chen2Yong Chen3Guoqi Song4Huimin Liu5Yongshi Wang6Pengfei Zhang7Yibo Qiu8Tao Chen9Jiyan Li10Xinjin Liu11Peng Liu12Yuelin Feng13Hui Zhang14Hui Zhang15Qian Huang16Qian Huang17Yelei Wang18Yelei Wang19Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, ChinaKey Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaShengli Oilfield Company, SINOPEC, Dongying, ChinaKey Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, ChinaKey Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, ChinaKey Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao, ChinaSchool of Geosciences, China University of Petroleum (East China), Qingdao, ChinaMulti-stage hydrocarbon generation and accumulation are very common in petroliferous basins. Also, determination of hydrocarbon accumulation stages and each related diagenetic feature is important for understanding the distribution of current oil and gas resources in one individual basin. However, in the case of conventional sandstone reservoirs, few studies have focused on these resulting reservoir features (e.g., physical property and wettability) that are caused by the first accumulation of hydrocarbons and their geological implications. In this study, taking the reservoir from the Eocene Dongying Depression as an example, we investigated the features of the early hydrocarbon accumulation and its effects on the late accumulation, by analyzing the early accumulation-related paragenesis, fluid inclusions, clay minerals content, reservoir physical property, and wettability in sandstones. Our results show that the early stage accumulation of the overpressured hydrocarbon fluid could support and offset some loads of overburden, weaken the normal compaction, and preserve some original pores. Also, the early hydrocarbon accumulation resulted in an alternated, diagenetic fluid environment from the initial acidic to subsequent alkalic conditions, with the overall dissolution intensity stronger than the cementation, and formed a large number of secondary pores. As a result, the early accumulation was beneficial to reservoir space development and provided more space for the late hydrocarbons. In addition, the early hydrocarbon accumulation could cause the alteration of rock wettability and gradually formed a lipophilic migration pathway from the source rock to the reservoir. Also, the late stage of hydrocarbons would preferentially choose this dominant pathway for their migration (i.e., inheritance of migration pathway).https://www.frontiersin.org/articles/10.3389/feart.2022.915747/fullhydrocarbon accumulationsandstone reservoirdiagenesiswettabilityfluid inclusion |
| spellingShingle | Miao Wang Miao Wang Yong Chen Yong Chen Guoqi Song Huimin Liu Yongshi Wang Pengfei Zhang Yibo Qiu Tao Chen Jiyan Li Xinjin Liu Peng Liu Yuelin Feng Hui Zhang Hui Zhang Qian Huang Qian Huang Yelei Wang Yelei Wang Features of the Early Hydrocarbon Accumulation and Its Effects on the Late Accumulation in Sandstone Reservoir: A Case Study of the Eocene Dongying Depression, Bohai Bay Basin Frontiers in Earth Science hydrocarbon accumulation sandstone reservoir diagenesis wettability fluid inclusion |
| title | Features of the Early Hydrocarbon Accumulation and Its Effects on the Late Accumulation in Sandstone Reservoir: A Case Study of the Eocene Dongying Depression, Bohai Bay Basin |
| title_full | Features of the Early Hydrocarbon Accumulation and Its Effects on the Late Accumulation in Sandstone Reservoir: A Case Study of the Eocene Dongying Depression, Bohai Bay Basin |
| title_fullStr | Features of the Early Hydrocarbon Accumulation and Its Effects on the Late Accumulation in Sandstone Reservoir: A Case Study of the Eocene Dongying Depression, Bohai Bay Basin |
| title_full_unstemmed | Features of the Early Hydrocarbon Accumulation and Its Effects on the Late Accumulation in Sandstone Reservoir: A Case Study of the Eocene Dongying Depression, Bohai Bay Basin |
| title_short | Features of the Early Hydrocarbon Accumulation and Its Effects on the Late Accumulation in Sandstone Reservoir: A Case Study of the Eocene Dongying Depression, Bohai Bay Basin |
| title_sort | features of the early hydrocarbon accumulation and its effects on the late accumulation in sandstone reservoir a case study of the eocene dongying depression bohai bay basin |
| topic | hydrocarbon accumulation sandstone reservoir diagenesis wettability fluid inclusion |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.915747/full |
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