Gas-bearing property prediction of Leikoupo Formation in the northwest Sichuan Basin based on the theory of two-phase media

ZHANG Hao; XIN Yong-Guang; TIAN Han

doi:10.11720/wtyht.2021.1340

2021 Vol. 45, No. 6

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Article navigation > Geophysical and Geochemical Exploration > 2021 > 45(6): 1386-1393

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ZHANG Hao, XIN Yong-Guang, TIAN Han. 2021. Gas-bearing property prediction of Leikoupo Formation in the northwest Sichuan Basin based on the theory of two-phase media. Geophysical and Geochemical Exploration, 45(6): 1386-1393. doi: 10.11720/wtyht.2021.1340

Citation:

ZHANG Hao, XIN Yong-Guang, TIAN Han. 2021. Gas-bearing property prediction of Leikoupo Formation in the northwest Sichuan Basin based on the theory of two-phase media. Geophysical and Geochemical Exploration, 45(6): 1386-1393. doi: 10.11720/wtyht.2021.1340

Gas-bearing property prediction of Leikoupo Formation in the northwest Sichuan Basin based on the theory of two-phase media

1. Petrochina Hangzhou Research Institute of Geology,Hangzhou 310023,China;
2. Research Institute of Sichuan Basin,PetroChina Research Institute of Petroleum Exploration & Development,Chengdu 610041,China

Received Date: 01 July 2020

Revised Date: 20 December 2021

Publish Date: 21 December 2021

Abstract

Abstract

The Leikoupo Formation in northwest Sichuan Basin has great potential in exploration,quite a few wells demonstrate active oil and gas showings during drilling,and good gas-bearing property and reservoir development are interpreted from well logging.Aiming at tackling the unclear distribution of favorable gas-bearing zones of Leikoupo Formation and based on the combination of seismic geological conditions and well logging data,the authors conducted Empirical Mode Decomposition processing to compensate high-frequency energy while preserving the low-frequency energy,which laid the data basis for subsequent bi-media hydrocarbon detection technique.Then amplitude spectrums at different well locations were compared and analyzed,the low-frequency energy enhancement and high-frequency energy attenuation were found where reservoir contained gas.With the optimized frequency range,hydrocarbon detection based on two-phase media theory was implemented on the seismic data of the study area.The results of hydrocarbon detection are well consistent with the data from drilling wells and the geological law,which confirms the validity of proposed techniques and provides the directions for expanding oil and gas exploration range and area of Leikoupo Formation in northwest Sichuan Basin.
- two-phase media /
- hydrocarbon detection /
- empirical mode decomposition /
- Sichan Basin /
- Leikoupo Formation /
- oilgas geological engineering

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References

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