| Institute of Geomechanics, Chinese Academy of Geological Sciences | Host |
| Citation: |
Hongjin HU, Youlu JIANG, Jingdong LIU, Kai ZHAO, Xiaoshui MU. DYNAMIC ACCUMULATION PROCESS OF COAL-FORMED GAS IN WENLIU AREA, DONGPU DEPRESSION[J]. Journal of Geomechanics, 2019, 25(2): 215-222. doi: 10.12090/j.issn.1006-6616.2019.25.02.020
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DYNAMIC ACCUMULATION PROCESS OF COAL-FORMED GAS IN WENLIU AREA, DONGPU DEPRESSION
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Abstract
The Wenliu area is one of the typical coal-formed gas accumulation zones in the Bohai Bay Basin. With the deepening of exploration, the fine characterization of the coal-forming gas accumulation process in this area still needs to be improved. The fluid inclusion technology was used to analyze the coal-formed gas accumulation date in Wenliu area. Based on the analysis of fault activity, the evolution characteristics of the transport system in the study area were determined. The gas-fluid inclusion abundance (GOI) test were used to analyze the gas preservation conditions, and finally the process of coal-formed gas accumulation in Wenliu area was carried out. The results show that the Wendong fault is a gas source fault in the study area, and its hydrocarbon supply conditions can be characterized by the Fault Transport Efficiency Coefficient (FTEC). The study area has superior gas supply conditions; the coal-formed gas in Wenliu area originates from the adjacent deep sag zone, and vertically transports along the Wendong fault to the Carboniferous-Permian and the Es4 sandstone reservoirs in the trap during the sedimentary period of the Dongying Formation. Small amount of the coal-formed gas loss occurred during the tectonic uplifting movements in the late sedimentary period of the Dongying Formation. -
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References
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Hongjin HU, Youlu JIANG, Jingdong LIU, Kai ZHAO, Xiaoshui MU. DYNAMIC ACCUMULATION PROCESS OF COAL-FORMED GAS IN WENLIU AREA, DONGPU DEPRESSION[J]. Journal of Geomechanics, 2019, 25(2): 215-222. doi: 10.12090/j.issn.1006-6616.2019.25.02.020
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- Figure 1. Location and profile of the Wenliu area
- Figure 2. Burial and thermal evolution history of Permo Carboniferous in Qianliyuan-Wenliu area of the Dongpu Depression
- Figure 3. Development characteristics of fluid inclusions in coal-formed gas reservoir in the Wenliu area
- Figure 4. Dating of coal-formed gas accumulation using homogenization temperature combined with geothermal and burial history
- Figure 5. The relationship between the reservoir water salinity and the faulted thickness of salt caprock
- Figure 6. Tracing the changes of gas-water interface by GOI method in Wen well 109
- Figure 7. Accumulation process of coal-formed gas in the Wenliu area (The section position is shown in figure 1)