High-temperature overpressure basin reservoir and pressure prediction model

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, 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. Yinggehai Basin'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 reservoir can be found in high-temperature overpressure stratum. It is a great theoretical breakthrough of reservoir knowledge.