The Identification And Evaluation Of Excellent Source Rockin Tanan Sag And Nanbeier Sag

The stratigraphic-lithologic reservoirs has become the most realistic, potential and widespread fields of hydrocarbon exploration in China. The stratigraphic-lithologic reservoirs develop with a low exploration extent in Hainan-Yuedong gently slope belt of the beach area of Liaohe basin, which is the most important backup fields of hydrocarbon exploration in Liaohe oil field. Therefore, the study on the exploration techniques and accumulation rule of the stratigraphic-lithologic reservoirs is very important to early make progress in petroleum exploration practice of the beach area.In view of the lack of the well in the gently slope belt, the well data of the main structure are all considered in the process of research. With the seismic response characters, the isochronous stratigraphic framework is built. Through the analysis of the sedimentary facies and seismic facies, this paper studied the structure and deposition evolution characteristics in an isochronous stratigraphic framework. Based on comprehensive study of the sequence, structure and deposition, by using impedance inversion and the seismic attribute identification, the reservoir and its distribution is predicted and the identification and evaluation of the stratigraphic-lithologic reservoirs in the gently slope belt whit a few exploration wells are formed. The reservoir-formning condition and accumulation rule are summarized. The model of hydroarbonate accumulation of the stratigraphic-lithologic reservoirs in the gently slope belt is built. The favorable stratum and area of the stratigraphic-lithologic reservoirs is pointed out.On the generalization of this paper,9 stratigraphic-lithologic traps and oil-bearing area of 31.4km2 are discovered.3774 million tons of oil geologic reserves is predicted and Haiyue lwell is arranged。It gives a powerful support to enhance the exploration effective in the beach area.