Quantitative Evaluation of Hydrocarbon Lateral Passage in the Southen Part of Bodong Low Uplift

doi:10.11885/j.issn.1674-5086.2016.03.20.01

Abstract

Abstract: Uncertainty about the lateral passage and migration capability of hydrocarbon in the southern part of the Bodong Low Uplift influences the establishment of a reservoir-forming model, as well as Neogene exploration. Based on the well drilling and logging data, together with the extraction of seismic attributes and the observation of the rock core, hydrocarbon migration was analyzed in the study area. This study concludes that the lateral passage of a sand body in the Guantao Group was subject to the degree of development of a long-lived fault embedded in the hydrocarbon source rock, and its sand-carrying capacity. The passage layer and cover layer at the surface of the unconformity at the top of a buried hill of volcanic rock have a good configuration relationship. The semi-weathered rock has developed primary and secondary pores and fractures, and the buried hill extends to a deep depressional area at the end of the ramp, which is the main lateral passage for hydrocarbon. Based on the establishment of a reservoir-forming model, the lateral migration capability is affected by the contact length between the migration ridge of the carrier ridge of the buried hill and the source rock, the dip angle of the ridge, and the trap area on the ridge. A migration index of semi-weathered rock was established to reflect quantitatively the lateral accumulation capacity, which facilitates practical Neogene exploration.

Key words: southern part of Bodong Low Uplift, Neogene exploration, hydrocarbon lateral migration, buried hill of volcanic rock, semi-weathered rock in unconformity, quantitative evaluation

CLC Number:

TE122

ZHANG Hongguo, GUAN Dayong, LIU Pengbo, MA Xugang, SU Kai. Quantitative Evaluation of Hydrocarbon Lateral Passage in the Southen Part of Bodong Low Uplift[J]. 西南石油大学学报(自然科学版), 2017, 39(3): 57-65.

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