| Citation: |
ZHANG Yaoyao, YANG Shuisheng, LIU Yuqi, LIU Xiuchan, WANG Feng, ZHAO Zhenhua, WANG Aimin, ZHOU Shenglun. 2023. Enrichment Enrichment Regularity of Y–9 Reservoir of Yan’an Formation in Shawagou Area of Jingbian Oilfield, Ordos Basin. Northwestern Geology, 56(2): 213-224. doi: 10.12401/j.nwg.2022033
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Enrichment Enrichment Regularity of Y–9 Reservoir of Yan’an Formation in Shawagou Area of Jingbian Oilfield, Ordos Basin
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Abstract
Based on the study of reservoir characteristics, reservoir distribution and type, the oil and gas enrichment law of Y–9 reservoir in Shawagou Y–9 reservoir in Jingbian is summarized by using the method of superposition of basic reservoir forming geological conditions and reservoir distribution. The results show that Y–9 reservoir in the study area is a mesopore–low permeability reservoir, and Y–9 reservoir type is a tectonic–lithologic reservoir. Distribution and enrichment of Y–9 reservoir are controlled by various factors, including the Jurassic paleogeomorphology controls on reservoir play a leading role, provide important channels for hydrocarbon migration, deep valley favorable facies belt and nose–like uplift structure provides a favorable hydrocarbon accumulation place, the development of interlayer condition and effective reservoir and caprock controls the vertical distribution and scale of reservoirs. Comprehensive analysis shows that the area where mudstone interlayer is not developed, sand body of branch channel and superimposed tectonic uplift is the oil and gas rich area, which is the key position for exploration.
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Keywords:
- reservoirs /
- reservoir characteristics /
- enrichment law /
- Y–9 /
- Jingbian oilfield /
- Ordos basin
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References
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ZHANG Yaoyao, YANG Shuisheng, LIU Yuqi, LIU Xiuchan, WANG Feng, ZHAO Zhenhua, WANG Aimin, ZHOU Shenglun. 2023. Enrichment Enrichment Regularity of Y–9 Reservoir of Yan’an Formation in Shawagou Area of Jingbian Oilfield, Ordos Basin. Northwestern Geology, 56(2): 213-224. doi: 10.12401/j.nwg.2022033
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Figure 1.
Structural unit division of Ordos basin and location map of the study area
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Figure 2.
Histogram and cumulative frequency chart of porosity
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Figure 3.
Histogram & cumulative frequency of permeability
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Figure 4.
Microscopic characteristics of Yan–9 reservoir of Yan’an Formation in the study area
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Figure 5.
Histogram of pore type of Yan–9 reservoir in study area
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Figure 6.
Reservoir plane distribution map of Y–9 oil formation in the study area
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Figure 7.
Oil reservoir profile of Yan–9 reservoir in well 109-01～Zhong 146–04 in study area
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Figure 8.
Location relationship between the study area and Jurassic ancient channel
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Figure 9.
Comprehensive histogram of source rock, reservoir and cover of Yan–9 in the study area （Jingtan 828 well）
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Figure 10.
Distribution of Yan 922 sedimentary facies in the study area
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Figure 11.
Overlap diagram of mudstone thickness at the top of Chang 2 and oil test of Chang 2 in Zhaoan area, Ordos Basin
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Figure 12.
Oil–bearing area, top–surface structure and sand–body distribution overlap of Yan922 reservoir in study area
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Figure 13.
Hydrocarbon accumulation pattern diagram of Yan–9 reservoir in Yan’an Formation in the study area