| The Waikuo block is located in eastern songliao basin,also in northeast sartu oilfield.Due to the characteristics of small reservoir sand body size,rapid change and obvious fault sealing,the oil-water relationship between the reservoir structure and the study area is relatively complex.In order to further evaluate the reservoir and realizethe new proved reserves,it is necessary to study the reservoir structure,the spatial configuration of three-phase fluid of oil-gas-water and its controlling factors.This program used the data of three-dimensional earthquake,logging and drilling with the regional geologic background,combined with previous research results to make the study.The trap and faults in the research area are recognized through fine structural analysis.With establishing precise stratigraphic high resolution frame,the characteristics of reservoir in the research area are studied in detail,through the seismic inversion technique.The reservoir characteristics are visually displayed by 8diagrams of sedimentary microfacies,for clearing the structural characteristics of reservoir.Based on the results of the logging interpretation and oil test interpretation,MDT fluid analysis and other data,the research area can be recognized an anticline reservoir as a whole,which is divided into three types: fault block reservoir,fault lithologic reservoir and lithologic reservoir.The structural characteristics control the distribution of oil-gas-water,which generally conforms to the distribution law of high oil content and low water content.However,the oil-water interface in the research area is characterized by non-uniformity both laterally and vertically.The oil-water interface drops northward horizontality and does not meet the gravitational differentiation.Based on the theory of oil-water distribution,this program analyzes the reasons for the complexity of the oil-water interface in the research area from the aspects of structure,faults,the anisotropy of reservoir and hydrocarbon accumulation model.The program also summarizes the main controlling factors affecting the oil-gas-water distribution.This study clarified the structure characteristics of the oil-bearing layer in the study area,deepened the understanding of oil and water in the outspread area of Daqing Placanticline,analyzed the main controlling factors affecting the distribution of oil-gas-water in the study area,and provided the main basis for the efficient development of oil field. |
