Research On Depositional Faces And Spreading Of Sandbody Of Fuyang Oil Layers In Chaochang Area

Based on relevant research results of the previous reseachers, by means of the principle and method of the high-resolution sequence stratigraphy, according to detailed analysis on core and well curves and by the study of division and correlation of substrata in Chaochang Area, it can be disport 39 sand layers.In this paper, according to sandbodies distribution characteristics, the quantitative analysis of heavy minerals and formation dip, and combined with the regional tectonic and geololical background closely, a research was did about the provenance of Chaochang Area. From the research we have the conclusion that there’re two soure directions that one is southeast, and the other is southwest. Depositional environments and sedimentary facies are congenital geological factors, which control the development and distribution of the sandstone reservoir. In this paper, the sedimentary facies and distribution are finely analysed based on the informations of drilling, core, logging and analysis, it is identified that the study area is mainly composed of meandering river and braided delta. There are eight kinds of sedimentary microfacies in this area, such as distributary channel, point bar and frontal sheet sand and etc. The mode of core-well is established. Research on spreading of sandbody of main force oil reservoirs was made clear.