走滑断裂对原油性质的控制作用：以鄂尔多斯盆地南部泾河油田为例

苏鹏; 胡守志; 李水福; 梁承春; 尹超; 邓杰; 杨宇航; 唐大卿

doi:10.3799/dqkx.2023.056

Volume 48 Issue 6

Jun. 2023

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Article Navigation > Earth Science > 2023 > 48(6): 2310-2323

Su Peng, Hu Shouzhi, Li Shuifu, Liang Chengchun, Yin Chao, Deng Jie, Yang Yuhang, Tang Daqing, 2023. Control of Strike-Slip Faults on Crude Oil Properties: Exemplified by Jinghe Oilfield in South Ordos Basin. Earth Science, 48(6): 2310-2323. doi: 10.3799/dqkx.2023.056

Citation:

Su Peng, Hu Shouzhi, Li Shuifu, Liang Chengchun, Yin Chao, Deng Jie, Yang Yuhang, Tang Daqing, 2023. Control of Strike-Slip Faults on Crude Oil Properties: Exemplified by Jinghe Oilfield in South Ordos Basin. Earth Science, 48(6): 2310-2323. doi: 10.3799/dqkx.2023.056

Citation:

Su Peng, Hu Shouzhi, Li Shuifu, Liang Chengchun, Yin Chao, Deng Jie, Yang Yuhang, Tang Daqing, 2023. Control of Strike-Slip Faults on Crude Oil Properties: Exemplified by Jinghe Oilfield in South Ordos Basin. Earth Science, 48(6): 2310-2323. doi: 10.3799/dqkx.2023.056

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Control of Strike-Slip Faults on Crude Oil Properties: Exemplified by Jinghe Oilfield in South Ordos Basin

doi: 10.3799/dqkx.2023.056

1.
School of Earth Resources, China University of Geosciences, Wuhan 430074, China
2.
North China Oil and Gas Branch, SINOPEC, Zhengzhou 450006, China

Received Date: 2022-08-29
Publish Date: 2023-06-25

Abstract

Abstract

Strike-slip fault area unit developed within the southern part of Ordos basin, forming a novel fracture-type tight reservoir, and heavy oil with unknown origin is found within the reservoir. In order to clarify the origin and distribution of heavy oil within the study space and further understand the reservoir - controlling mechanism of fracture-type tight reservoir in strike - slip fault zone, in this paper, the crude oil in the study area was detected by gas chromatography mass spectrometry, and the geochemical characteristics of the crude oil were studied in detail. Then the geochemical characteristics of heavy oil and normal crude oil were compared, and the fracture density in the study area was calculated based on logging data. The relationship between the thickening factors of crude oil and the strike-slip fault zone was analyzed. The results show that the crude oil of Chang 6-Chang 8 member in Jinghe oilfield primarily comes from identical set of source rocks, that is characterised by depositing within the fresh water lake basin with sturdy reducibility, and also the organic matter source is that the mixed input of alga and better plants. There's no obvious distinction between the heavy oil and traditional crude oil within the sedimentary environment, organic matter source and maturity, however there are obvious variations within the degree of biodegradation, heavy oil happiness to grade 3-4 biodegradation. The heavy oil in Jinghe field is principally distributed within splicing tape of the strike-slip fault belt with terribly concentrated little cracks. The strike-slip fault belt has a clear control on the adjustment and preservation of fossil oil, and incorporates a shut relationship with the formation of hevay oil in Jinghe oilfield, that is, it's associated with the dispersion loss of light hydrocarbon and biodegradation compound within the relevant fractures and cracks.
- strike-slip fault,
- crude oil property,
- oil thickening,
- Jinghe oilfield,
- Ordos basin,
- petroleum geology

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References(66)

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