Characteristics of fluid potential and division of hydrocarbon migration and accumulation units in the Shijiazhuang Sag

Abstract

In this paper, the Hubbert fluid potential model is used to restore the fluid potential of the key reservoir forming period at the end of Paleogene in Shijiazhuang Sag. At the end of Paleogene, the high potential area of Shijiazhuang Sag is mainly located in the Western trough belt of the sag, which is the main flow supply area. The low potential area of the sag is mainly distributed in the Gao cheng tectonic belt in the middle, which is the main discharge area. The overall performance is the distribution law of the trough to the central buried hill belt, and the potential energy gradually decreases. The sag is further divided into three major oil and gas migration and accumulation units, namely, the southern oil and gas migration and accumulation unit (III), the central oil and gas migration and accumulation unit (I), and the northern oil and gas migration and accumulation unit (II). Among them, the central oil and gas migration and accumulation unit (I) is the best oil and gas migration and accumulation unit, which receives multi-source hydrocarbon supply and has favorable reservoir forming conditions.