Abstract:

The study of petroleum migration and accumulation is a fundamental scientific issue in petroleum geological researches. To investigate complex petroleum migration and accumulation is a hot and difficult topic in the research. In this paper, we have proposed a new method for investigating the complex petroleum migration and accumulation, i.e., the petroleum migration and accumulation type, based on a case study in the Luxi Area of the central Junggar Basin. The applications of the method are twofold. First, after the discovery of hydrocarbon shows in exploration, the analysis of the petroleum migration and accumulation type could provide basic information for assessing petroleum accumulation potential and oil well testing. Second, the difference of petroleum migration and accumulation type/process between successful and failure wells should be studied after the oil well testing, which could provide basic information for shaping the strategy of  petroleum exploration and assessment. The above method had a successful application in the case study of the Luxi Area and showed promising prospects. Thus, this method can be popularized and applied in other areas, though the distinguishing criteria suggested on the basis of the Luxi Area may not be used arbitrarily in the other areas.

Key words:  petroleum migration and accumulation, petroleum reservoir formation, hydrocarbon show, organicinorganic geochemistry, Junggar Basin, Luxi Area