鄂尔多斯盆地上三叠统长7段泥页岩储集性能

吴松涛; 邹才能; 朱如凯; 袁选俊; 姚泾利; 杨智; 孙亮; 白斌

doi:10.3799/dqkx.2015.162

Volume 40 Issue 11

Nov. 2015

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Article Navigation > Earth Science > 2015 > 40(11): 1810-1823

Wu Songtao, Zou Caineng, Zhu Rukai, Yuan Xuanjun, Yao Jingli, Yang Zhi, Sun Liang, Bai Bin, 2015. Reservoir Quality Characterization of Upper Triassic Chang 7 Shale in Ordos Basin. Earth Science, 40(11): 1810-1823. doi: 10.3799/dqkx.2015.162

Citation:

Wu Songtao, Zou Caineng, Zhu Rukai, Yuan Xuanjun, Yao Jingli, Yang Zhi, Sun Liang, Bai Bin, 2015. Reservoir Quality Characterization of Upper Triassic Chang 7 Shale in Ordos Basin. Earth Science, 40(11): 1810-1823. doi: 10.3799/dqkx.2015.162

Citation:

Wu Songtao, Zou Caineng, Zhu Rukai, Yuan Xuanjun, Yao Jingli, Yang Zhi, Sun Liang, Bai Bin, 2015. Reservoir Quality Characterization of Upper Triassic Chang 7 Shale in Ordos Basin. Earth Science, 40(11): 1810-1823. doi: 10.3799/dqkx.2015.162

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Reservoir Quality Characterization of Upper Triassic Chang 7 Shale in Ordos Basin

doi: 10.3799/dqkx.2015.162

Wu Songtao^{1, 2
,},
Zou Caineng¹,
Zhu Rukai^{1, 2},
Yuan Xuanjun^{1, 2},
Yao Jingli³,
Yang Zhi¹,
Sun Liang¹,
Bai Bin^{1, 2}

1.
PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
2.
CNPC Key Laboratory of Oil & Gas Reservoirs, Beijing 100083, China
3.
PetroChina Changqing Oilfield Company, Xi'an 710066, China

Received Date: 2015-03-02
Publish Date: 2015-11-15

Abstract

Abstract

The successful exploration and development of shale gas have triggered an upsurge of research in global marine shale. However, more reservoir quality research of non-marine shale in oil window is still needed. Reservoir quality potential of Upper Triassic Chang 7 shale in Ordos basin was analyzed based on the data from thin section, FE-SEM, environmental SEM, nano-CT, GRI, and gas adsorption. Chang 7 shale is deposited in semi-deep to deep lake, covering an area of 10×10⁴ km². Geochemical data suggests that Chang 7 shale has potential of great hydrocarbon (HC) generation, with TOC > 2%, R_o=0.8%-1.0% and HI=124-480 mg/g. The brittle mineral content is 45%-59%. The total porosity and permeability are 0.6%-3.8%, 0.000 72×10^-3-0.002 30×10^-3 μm² respectively. Three types of pores including interparticle pores, intra-particle pores and intra-organic matter (OM) pores are discovered, and intra-illite/smectite mix-layers pores dominate in the storage space, with small number of OM pores. The diameter of pores is 30-200 nm and the connectivity of pore system is medium to good, indicating that Chang 7 shale is of the potential to become reservoir for shale oil. The pore volume is more related to illite/smectite mix-layers content than to that of maturity and hydrocarbon index, which may suggest that the porosity in Chang 7 shale is controlled by diagenesis rather than HC generation. The residual HC is absorbed and distributed as free hydrocarbons in intra-pyrite pores, intra-illite/smectite mix-layer pores, intra-illite pores and inter-feldspar pores.
- unconventional oil and gas,
- lacustrine shale,
- Chang 7 shale,
- shale oil,
- nano-pore system,
- tight oil and gas,
- Ordos basin,
- petroleum geology.

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References(76)

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Reservoir Quality Characterization of Upper Triassic Chang 7 Shale in Ordos Basin

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