Lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon-a case study of Zhangjiatan Shale
The Zhangjiatan shale of the Southeastern Ordos Basin, which deposits in deep lake facies, has strong lithologic heterogeneity; it represents as shale, sandy laminae shale and thin sandstone. Shale with mm- to cm-scale sandy laminae is defined as Sandy Laminae Shale (SLS). However, the relationship...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2019-03-01
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| Series: | Open Geosciences |
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| Online Access: | https://doi.org/10.1515/geo-2019-0009 |
| _version_ | 1818587087318810624 |
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| author | Fan Bojiang Shi Liang Li Yating Zhang Tianjing Lv Lei Shikai Tong |
| author_facet | Fan Bojiang Shi Liang Li Yating Zhang Tianjing Lv Lei Shikai Tong |
| author_sort | Fan Bojiang |
| collection | DOAJ |
| description | The Zhangjiatan shale of the Southeastern Ordos Basin, which deposits in deep lake facies, has strong lithologic heterogeneity; it represents as shale, sandy laminae shale and thin sandstone. Shale with mm- to cm-scale sandy laminae is defined as Sandy Laminae Shale (SLS). However, the relationship between lithologic heterogeneity and hydrocarbon accumulation has never been studied. This study shows that lithologic heterogeneity, especially the occurrence of SLS will influence the accumulation of hydrocarbons within the shale system. SLS commonly has a larger pore size, higher porosity and better connectivity than thick and homogeneous shale. SLS commonly contains fewer residual hydrocarbons than homogeneous thick shale, indicating comparative ease in hydrocarbon expulsion. SLS commonly generates more bedding fractures. More fractures can be incurred when fracture extending into SLS. The occurrence of SLS can provide more storage spaces for fluids and gases, including oil, water, adsorbed gas, dissolved gas and free gas. SLS has been the pilot exploration and development target for shale hydrocarbon in the southeastern Ordos Basin. Homogeneous and thick shales, which have a large content of residual hydrocarbons, would be the targets for future exploration. |
| first_indexed | 2024-12-16T09:03:17Z |
| format | Article |
| id | doaj.art-26d76ff8dc5849cc9dd899a6620f6746 |
| institution | Directory Open Access Journal |
| issn | 2391-5447 |
| language | English |
| last_indexed | 2024-12-16T09:03:17Z |
| publishDate | 2019-03-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Geosciences |
| spelling | doaj.art-26d76ff8dc5849cc9dd899a6620f67462022-12-21T22:37:07ZengDe GruyterOpen Geosciences2391-54472019-03-0111110111210.1515/geo-2019-0009geo-2019-0009Lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon-a case study of Zhangjiatan ShaleFan Bojiang0Shi Liang1Li Yating2Zhang Tianjing3Lv Lei4Shikai Tong5School of Petroleum and Environmental Engineering, Yan An university, Yan An 716000, Yan An, ChinaSchool of Petroleum and Environmental Engineering, Yan An university, Yan An 716000, Yan An, ChinaSchool of Petroleum and Environmental Engineering, Yan An university, Yan An 716000, Yan An, ChinaSchool of Petroleum and Environmental Engineering, Yan An university, Yan An 716000, Yan An, ChinaSchool of Petroleum and Environmental Engineering, Yan An university, Yan An 716000, Yan An, ChinaSchool of Petroleum and Environmental Engineering, Yan An university, Yan An 716000, Yan An, ChinaThe Zhangjiatan shale of the Southeastern Ordos Basin, which deposits in deep lake facies, has strong lithologic heterogeneity; it represents as shale, sandy laminae shale and thin sandstone. Shale with mm- to cm-scale sandy laminae is defined as Sandy Laminae Shale (SLS). However, the relationship between lithologic heterogeneity and hydrocarbon accumulation has never been studied. This study shows that lithologic heterogeneity, especially the occurrence of SLS will influence the accumulation of hydrocarbons within the shale system. SLS commonly has a larger pore size, higher porosity and better connectivity than thick and homogeneous shale. SLS commonly contains fewer residual hydrocarbons than homogeneous thick shale, indicating comparative ease in hydrocarbon expulsion. SLS commonly generates more bedding fractures. More fractures can be incurred when fracture extending into SLS. The occurrence of SLS can provide more storage spaces for fluids and gases, including oil, water, adsorbed gas, dissolved gas and free gas. SLS has been the pilot exploration and development target for shale hydrocarbon in the southeastern Ordos Basin. Homogeneous and thick shales, which have a large content of residual hydrocarbons, would be the targets for future exploration.https://doi.org/10.1515/geo-2019-0009slshydrocarbon distributionshale hydrocarbonzhangjiatan shalesoutheastern ordos basin |
| spellingShingle | Fan Bojiang Shi Liang Li Yating Zhang Tianjing Lv Lei Shikai Tong Lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon-a case study of Zhangjiatan Shale Open Geosciences sls hydrocarbon distribution shale hydrocarbon zhangjiatan shale southeastern ordos basin |
| title | Lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon-a case study of Zhangjiatan Shale |
| title_full | Lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon-a case study of Zhangjiatan Shale |
| title_fullStr | Lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon-a case study of Zhangjiatan Shale |
| title_full_unstemmed | Lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon-a case study of Zhangjiatan Shale |
| title_short | Lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon-a case study of Zhangjiatan Shale |
| title_sort | lithologic heterogeneity of lacustrine shale and its geological significance for shale hydrocarbon a case study of zhangjiatan shale |
| topic | sls hydrocarbon distribution shale hydrocarbon zhangjiatan shale southeastern ordos basin |
| url | https://doi.org/10.1515/geo-2019-0009 |
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