Study on quantitative grain fluorescence analysis technique applied to shallow reservoirs in Hashan area, Junggar Basin

YANG Yunze; LIU Qingxin; ZHANG Faqiang; YANG Jing; ZHANG Lixue; CHI Jingbai

doi:10.3969/j.issn.1672-9803.2023.03.004

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Mud Logging Engineering ›› 2023, Vol. 34 ›› Issue (3) : 22-31. DOI: 10.3969/j.issn.1672-9803.2023.03.004

TECHNOLOGY

Study on quantitative grain fluorescence analysis technique applied to shallow reservoirs in Hashan area, Junggar Basin

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Abstract

Quantitative grain fluorescence analysis technique was introduced to conduct QGF and QGF-E analyses of Jurassic-Cretaceous paleo-reservoirs and residual reservoirs in Hashan area of Junggar Basin. Application of the technique in shallow reservoir study shows that the QGF Index and QGF-E values of Jurassic-Cretaceous in Hashan area of Junggar Basin gradually decrease from west to east, and their intensities are positively correlated. The closer the sampling wells to oil sources, the more obvious the fluorescence phenomenon and the better the oil abundance. The study horizon has strong dredging performance, shallow recoil faults and fault-spreading folds lead to the loss of light hydrocarbon components of oil and gas, vertical oil and gas have a trend of migration from deep to shallow, the hydrocarbon components of shallow reservoirs are heavier and the oil abundance is higher. The lateral fluid potential decreases gradually from west to east and the thrust fault changes from steep to flat from west to east. The fluorescence intensity, density and viscosity of hydrocarbon fluids also decrease gradually. Through this application study, it can be seen that quantitative grain fluorescence analysis technique is an effective means to test oil-bearing intervals, and it is of great significance to reveal the migration path of oil and gas in the study area and study the characteristics of oil and gas accumulation.

Key words

quantitative grain fluorescence analysis / Jurassic / Cretaceous / Junggar Basin / shallow reservoir / oil and gas migration / paleo-reservoir

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YANG Yunze, LIU Qingxin, ZHANG Faqiang, et al. Study on quantitative grain fluorescence analysis technique applied to shallow reservoirs in Hashan area, Junggar Basin[J]. Mud Logging Engineering, 2023, 34(3): 22-31 https://doi.org/10.3969/j.issn.1672-9803.2023.03.004

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