断盖配置对沿断裂运移油气的封闭作用: 以南堡凹陷中浅层为例

付广; 杨敬博

doi:10.3799/dqkx.2013.076

Volume 38 Issue 4

Jul. 2013

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Article Navigation > Earth Science > 2013 > 38(4): 783-791

FU Guang, YANG Jing-bo, 2013. Sealing of Matching between Fault and Caprock to Oil-Gas Migration along Faults: An Example from Middle and Shallow Strata in Nanpu Depression. Earth Science, 38(4): 783-791. doi: 10.3799/dqkx.2013.076

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FU Guang, YANG Jing-bo, 2013. Sealing of Matching between Fault and Caprock to Oil-Gas Migration along Faults: An Example from Middle and Shallow Strata in Nanpu Depression. Earth Science, 38(4): 783-791. doi: 10.3799/dqkx.2013.076

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Sealing of Matching between Fault and Caprock to Oil-Gas Migration along Faults: An Example from Middle and Shallow Strata in Nanpu Depression

doi: 10.3799/dqkx.2013.076

Geoscience College, Northeast Petroleum University, Daqing 163318, China

Received Date: 2013-01-10
Publish Date: 2013-07-01

Abstract

Abstract

To study oil-gas accumulation law of middle and shallow strata in Nanpu depression, sealing of matching between fault and caprock to oil-gas migrating through faults was studied by the method contrasting between thickness of caprock and fault distance and analyzing the relation between it and oil-gas distribution. The results indicate that there are three grades sealing of regional caprock to oil-gas migration through faults: (1) when thickness of caprock is bigger than fault distance and faulted thickness of caprock is bigger than a fixed value, matching between fault and caprock can seal fully oil-gas migration through faults; (2) when thickness of caprock is less than fault distance and faulted thickness of caprock is less than a fixed value, matching between fault and caprock can partially seal oil-gas migration through faults; (3) when thickness of caprock is less than fault distance and faulted thickness of regional caprock is less than zero, matching between fault and caprock can not seal oil-gas migration through faults. Matching between faults and regional caprock of Ed₂ and Ng₃ both have a full, partial and no sealing to oil-gas migration through faults, and matching between faults and regional caprock of Nm₁ has full sealing to oil-gas migration through faults in Nanpu depression. Controlling of relation of matching among sealing of matching between fault and three regional caprock to oil-gas migrating through faults to oil-gas accumulation horizons and areas is shown in following three aspects: (1) matching between faults and regional caprock of Ed₂ in Nanpu2 region has full sealing, oil-gas distributes under it; (2) Matching between faults and regional caprock of Ed₂ in Nanpu 1-5 block has partial or no sealing, but matching between faults and regional caprock of Ng₃ has full sealing, oil-gas distributes mainl in Ed₃ and Ng₄; (3) Matching between faults and regional caprock of Ed₂ and Ng₃ in the part of Nanpu1 and Nanpu4 structures have partial or no sealing, but matching between faults and regional caprock of Nm₁ has full sealing, oil-gas distributes from lower to upper.
- matching between fault and caprocks,
- transporting faults,
- sealing,
- faulted thickness,
- oil-gas distribution layer,
- Nanpu depression,
- petroleum geology

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References(32)

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Sealing of Matching between Fault and Caprock to Oil-Gas Migration along Faults: An Example from Middle and Shallow Strata in Nanpu Depression

doi: 10.3799/dqkx.2013.076

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