FAVORABLE LITHOFACIES AND SWEET SPOT OPTIMIZATION OF THE Ek21 SHALE OIL IN CANGDONG SAG, BOHAI BAY BASIN

SONG Si-yu; CHEN Shi-yue; YAN Ji-hua; PU Xiu-gang

doi:10.13686/j.cnki.dzyzy.2023.02.013

2023 Vol. 32, No. 2

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Article navigation > Geology and Resources > 2023 > 32(2): 225-232

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SONG Si-yu, CHEN Shi-yue, YAN Ji-hua, PU Xiu-gang. FAVORABLE LITHOFACIES AND SWEET SPOT OPTIMIZATION OF THE Ek21 SHALE OIL IN CANGDONG SAG, BOHAI BAY BASIN[J]. Geology and Resources, 2023, 32(2): 225-232. doi: 10.13686/j.cnki.dzyzy.2023.02.013

Citation:

SONG Si-yu, CHEN Shi-yue, YAN Ji-hua, PU Xiu-gang. FAVORABLE LITHOFACIES AND SWEET SPOT OPTIMIZATION OF THE Ek21 SHALE OIL IN CANGDONG SAG, BOHAI BAY BASIN[J]. Geology and Resources, 2023, 32(2): 225-232. doi: 10.13686/j.cnki.dzyzy.2023.02.013

FAVORABLE LITHOFACIES AND SWEET SPOT OPTIMIZATION OF THE Ek21 SHALE OIL IN CANGDONG SAG, BOHAI BAY BASIN

1.
School of Geosciences and Technology, China University of Petroleum, Qingdao 266580, Shandong Province, China
2.
Exploration and Development Research Institute of Dagang Oilfield Plant, CNPC, Tianjin 300280, China

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Corresponding author: CHEN Shi-yue, chenshiyue@vip.sina.com

Received Date: 14 October 2021

Revised Date: 04 January 2022

Publish Date: 25 April 2023

Abstract

Abstract

To optimize the favorable lithofacies of shale and predict the sweet spots of shale oil distribution in the first sub-member of the second member of Kongdian Formation (Ek₂¹), the principal component analysis (PCA) is used to analyze three main geological components of shale oil, including resources (retained hydrocarbon), physical properties (porosity and permeability) and engineering properties (brittleness index and rock mechanics parameter). The results show that the lamellar felsic shale facies and lamellar mixed shale facies have high retained hydrocarbon content, with good porosity and permeability, and high brittleness index. Areas such as Wangguantun, south of Qilidian and southeast of Shenjiapu are all sweet spots of shale oil distribution with good oil-gas show.
- principal component analysis /
- retained hydrocarbon /
- porosity /
- permeability /
- shale oil sweet spot /
- Bohai Bay Basin

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References

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