Fault Trap Evaluation and Exploration Potential in Jiangling Sag

doi:10.3969/j.issn.1006-6535.2022.03.005

Abstract

Abstract: The complex fracture system in Jiangling Sag makes fault trapping evaluation extremely difficult, and the fault trapping performance and its combination characteristics and influencing factors bring challenges to the later exploration deployment in Jiangling Sag. According to the existing data and previous research results of Jiangling Sag and the principles of geology, the tectonic characteristics of Jiangling Sag and the evolution history of the faults were systematically analyzed, and the main fault systems were classified, the fault trapping mechanism was analyzed on the basis of studies on lateral fault trap, Jiangling Sag, and a fault trap mode of Jiangling Sag was established. The results showed that, the faults in the low-permeability zone could be trapped due to the different permeability between the fault zone and the surrounding rock, and the factors affecting fault trap included lithology joint, mudstone coating rate, rock properties, and permeability near the fault. Based on the comprehensive analysis of the fault trap in Jiangling Sag, a prospecting well was selected to the south of Well Ling 72, Jiangling Sag to making a new start for exploration in Jiangling Sag. The study results provide a theoretical basis for the role of faults in hydrocarbon accumulation and their trap characteristics, and can be used as a reference for the exploration and deployment of similar oilfields.

Key words: fault trapping, mudstone, fault system, accumulation conditions, Jiangling Sag

CLC Number:

TE121.1

Liu Jiandang, Lan Zhengkai, Jia Chao. Fault Trap Evaluation and Exploration Potential in Jiangling Sag[J]. Special Oil & Gas Reservoirs, 2022, 29(3): 36-42.

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