Characteristics and Influence Factors of Es3 Reservoirs in Gubei Sag

Abstract

There are many provenance systems in Gubei sag of Es3. Es3 is one of the main oil-bearing horizon of oil and gas exploration in gubei sag. Because of the great depth, the reservoir property is relatively poor. Influenced by factors such as sedimentary type and diagenesis, the reservoir characteristics of different provenance systems are different. The sedimentary type not only restricts the original physical properties, but also influences the late diagenesis. In the same diagenetic stage, there are differences in the physical properties of different sedimentary types, in the same sedimentary type there are also have many differences between different sedimentary microfiches. The fan delta is the best, and the second is the underwater fan; the best part of the fan delta is the river channel and estuary sand bar in the front of the fan delta. The influence of different provenance system by depth, rock characteristics, the moving distance of different factors, in the stage of diagenesis, diagenetic types and other aspects are different, these factors continue to transform the reservoir. Ultimately these factors lead to the Kendong and Gudao provenance systems have the best reservoirs, Changdi second, Chengdong worst.