Abstract:

The analysis on the exploration and research achievements shows that there are mainly two aspects of problems for the effectiveness of marine petroleum exploration in the Jianghan plain. Firstly, the understanding on the key role about reservoir hold condition as well as the relationship between petroleum-system elements and the styles of exploratory wells are inadequate.As a result, the exploratory effect is unsatisfied. Secondly, lots of exploration and research date indicate that the basic petroleum condition is excellent and it is favorable to form an oil and gas pool of the large to middle type. This basic petroleum condition includes several aspects as follow: (1) six sets of source rocks；(2) six sets of reservoirs；(3) two sets of regional covers；(4) two petroleum systems that one is excellent and another is good. Combining the research achievements on the basin evolution with the ponder on the above two-aspects problems, two exploration fields have been put forward, i.e. the intra-marine deposit body traps and the bottom wall traps in thrust belt. These two exploration fields are actually valuable for the future oil-gas exploration.Therefore, the Lower Paleozoic is the key and the Upper Paleozoic could be dual purpose for the future oil-gas exploration in the Jianghan plain. In order to form a solid exploration state, evaluation work about the orogenic front edge and the Cretaceous deposit should been expedited.On the basis of all above study, the breakthrough for the oil-gas exploration will be acquired in the future.

Key words: marine deposit, basin evolutionary analysis, petroleum exploration, the Jianghan plain