A Model for Controlling Hydrocarbon Accumulation in the Beijiao Palaeouplift of Qiongdongnan Basin

In this paper, the tectonic evolution of the Beijiao palaeouplift has been reconstructed, and the comprehensive study of petroleum geology has been conducted. It has been made clear that the Beijiao palaeouplift has experienced three tectonic evolution phases, including, rift phase, depression phase, new tectonic activity phase. The mechanism of the HC accumulation controlled by the palaeouplift, has been discussed. In palaeouplift area, there are various kinds of traps and HC migration systems, which are favorable for hydrocarbon migration and accumulation. Two kinds of HC accumulation model have been established for the Beijiao palaeouplift, namely inner of buried hill HC accumulation model, outside of buried hill HC accumulation model. These play a guiding role effectively for oil and gas exploration of the Beijiao palaeouplift.