The Study Of Fractures Distribution Law Of Dongshengpu Buried Hill

This paper takes Dongshengpu buried hill reservoir as the research object, based on core, logging, production test and seismic data, the paper will nalysis and research the fracture characteristics of Dongshengpu buried hill in-depth. Dongshengpu burial hill reservoir with its complex lithology, fracture distribution heterogeneity, has been a difficult field geological research area. Through core description, the degree of fracture developing is controlled by tensional stress. There are mainly three groups of fractures, fractures in NE to NNE are high angle fractures, partial filling, the crack width is 0.01?0.5mm and the average crack density is 61.5/m. At the same time, with the results of previous studies and the use of conventional logging data, reservoir logging interpretation chart which is used to identify the single well fracture is established.Based on the core description and logging identification, the Dongshengpu buried hill fracture can be predicted and the distribution of crack can be summarized by using seismic attributes. The degree of fracture development is influenced by faults, and is closely related to tectonic position, the top of the buried hill is bended to a larger scale, fractures develop well, oppositely the edge is in low dip area, fractures develop poor. The fractures in the North East is of good continuity and longitudinal fracture can be segmented. Below the top surface of buried hill, fractures are not well developed in 0?50m,and the most develop part is 50?300m,fractures are not developed below 300m. According to the results of fracture prediction, the reservoir distribution characteristics can be analyzed. Reservoir thickness is big in high structural parts on the plane, and become smaller to the edge gradually. The reservoir distribution and fracture distribution is consistent on the vertical, heterogeneity of reservoir is strong.