High-Temperature Overpressure Basin Reservoir and Pressure Prediction Model

Aiqun Liu, Jiaxiong Zhou, Dianyuan Chen, Bentian Ou, Caiwei Fan, Wentuo Li

Zhanjiang Branch of CNOOC Ltd., Zhanjiang, China.

DOI: 10.4236/ojms.2015.53021                

Abstract

Yinggehai Basin locates in the northern South China Sea. Since the Cainozoic Era, crust has several strong tension: the basin subsides quickly, the deposition is thick, and the crust is thin. In the central basin, formation pressure coefficient is up to 2.1; Yinggehai Basin is a fomous high-temperature overpressure basin.YinggehaiBasin’s in-depth, especially high-temperature overpressure stratum has numerous large-scale exploration goals. As a result of high-temperature overpressure basin’s perplexing geological conditions and geophysical analysis technical limitations, this field of gas exploration can’t be carried out effectively, which affects the process of gas exploration seriously. A pressure prediction model of the high-temperature overpressure basin in different structural positions is summed up by pressure forecast pattern research in recent years, which can be applied to target wells pre-drilling pressure prediction and post drilling pressure analysis of Yinggehai Basin. The model has small erroneous and high rate of accuracy. The Yinggehai Basin A well drilling is successful in 2010, and gas is discovered in high-temperature overpressure stratum, which proved that reservoir can be found in high-temperature overpressure stratum. It is a great theoretical breakthrough of reservoir knowledge.

Keywords

High-Temperature Overpressure, Yinggehai Basin, Pressure Prediction Model, Reservoir Theory

Conflicts of Interest

The authors declare no conflicts of interest.

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