Study On The Relationship Between Single Sand Body Characterization And Injection-mining In Bai Ma Area

Bai Ma middle area of Xi Feng oil field is a low permeability lithological reservoir with low reserves abundance and strong heterogeneity.It is developed by water injection at present,and some of the wells are highly watered ratio and injection-production unbalanced because of the strong heterogeneity.Therefore,it is of great importance to research the single sand body and the inner relationship between injection and production.Based on previous research,we carried out the following research in this paper.Firstly,by using the fine dividing and contrast method of the small layer,the reservoir in Bai Ma middle area is further divided,and a clearer stratigraphic framework wa s established.At the same time,based on the logging data,the method of sandwich identification for Bai Ma middle area was established,which greatly improved the efficiency and precision of sandwich identification.The morphology of sand body is characterized by comprehensive stratigraphic structure,and the distribution of various sand bodies is revealed.In addition,the calculation formula of the microscopic throat radius is derived,and the difference evaluation is made on the single sand body in the middle area.In the end,based on the results of sand body characterization,the dynamic analysis of production is carried out,and the Suggestions for the adjustment of the injection-production structure are put forward,and the research on the development and control technology policy is carried out by means of numerical simulation.Based on the above research,this paper argues that,on the one hand,the matching of various types of sand body is complicated,the essential reason for difference water flooding effect is the variable propertied of sand body,the worse they correspond to the properties of the sand body,the production effect is poorer,and it is proposed that a single sand body in the same unit as the basic development;On the other hand,from the perspective of the results of numerical simulation,It is suggested combined with proper holes etc.to adjust the injection-production structure.