Study On Evaluation Method Of Potential Potential Of Residual Oil In North Third East Block Of M Development Zone

At present,most of the oil fields in China are developed by water injection development,and most oil fields have entered the late stage of high water cut development,and some oil fields have entered the stage of diminishing production;but at this time,there are still a large number of weakly used oil layers in the reservoir There is still a large amount of remaining oil enriched underground in the unused oil layer,so the current research on remaining oil has become an important task of most oil fields.In oilfield mining operations,it is of great significance to clarify the formation and distribution rules and positions of remaining oil and evaluate its potential tapping potential for guiding the oilfield to carry out potential remaining oil potential tapping operations.In this paper,taking the west block in the east of the northern third area of the M development zone as an example,the research results of the remaining oil in this area are not sufficient and the remaining oil distribution is complex.It is clear that the main controlling factors affecting the distribution of remaining oil in this area are permeability,effective thickness,porosity,formation coefficient and sedimentary microfacies,and the importance of each influencing factor is analyzed and sorted by gray correlation analysis method.The feasibility of the fuzzy evaluation method for the well productivity of the measures was found to be 81.25% reasonable,and the method was used to evaluate the remaining oil potential of each well in the single layer of the study area.At the same time,a fuzzy design was designed for the block Evaluate the software to evaluate the potential of remaining oil potential in the area;combine the well position coordinates of each well under each layer and use petrel to randomly interpolate to form a planar distribution map of remaining oil potential under 18 single layers in the area,as a guide for the area Provide a basis for remaining oil tapping operations.