The Research Of Reservoir Fine Description And Remaining Oil Distribution Technology For South Changvuan Oilfield In Daqing

The research object of this thesis is located in Putaohua and Aobaota third order structure of south Changyuan second order structural zone in central depression of Songliao Basin. With the ever expansion of development area in South Changyuan Oilfield, sand bodies were found much more narrow and thinner according to the well data analysis after drilling operation. And they were beyond of control via existing developing well pattern. Oil water transitional zone varied tremendously and the distribution of remaining oil was scattered, which led to the increment on development difficulty. Though a lot of research work has been down on oilfield structure and reservoir, the understanding on the whole still needed to be intensified, and it was short of summary on the ways of research. To fix the problems mentioned above, based on sublayers classification and comparison, this research was done by using oilfield3D seism data as well as the research achievements on geologic fine description.To the reservoir structure characteristics, the acknowledge was depend and the types of structures were classified based on the drilling-seismic method. The quantitative evaluation of closure property of fracture was conducted.The reservoir fine description was also presented. The six-grade classification scheme of reservoir structure was established for Putaohua block properly. According to the scheme, the aeolotropism of thin layer in Pul layer group was explained, and the relationship between remaining oil and reservoir structure was analyzed.Based on the research result mentioned above, the formation pattern and the distribution of remaining oil were figured out, and the correspondent oil tapping methods were developed by using the combination of macro and micro formation mechanisms.