Research On The Distribution Law Of Oil And Water In The Marginal Oil Layer Of Hong 003 Well Area

Hongshan Oilfield Hong 003 well area is located in the northwestern margin of the Junggar Basin.Thesis focused on the problem that the oil-water relationship is not clear and the oil-water layer is difficult to be identified in the production process of Hong 003 well area,researched the distribution law of oil-water in the edge oil layer of Hong 003 zone.Based on the characteristics of oil and water logging,analyzed the longitudinal distribution of reservoir and water layer by well,determine the oil-water profile of single well.Combine fracture,tectonic,lithologic characteristics and production performance to study distribution characteristics and controlling factors of oil-water distribution in edge oil layer.Previous studies thought that the oil and water interface in this area was unified,and the side water is mainly water layer.distributed in the low structure parts of the southeastern part.However,with the deeper development,the eastern part of the region also appeared containing-water wells,oil-water distribution characteristics have big change.In order to further determine the law of oil-water distribution in this area,this paper uses the drilling test data,combined with the structure,fluid characteristics,plane distribution characteristics and accumulation mechanism,to study the regularities of distribution,control factors and development potential of oil and water level.According to the testing for oil results,combined logging technology to identify oil and water layer,built the oil and water logging interpretation chart.The study shows that the macroscopic general characteristics of this area belong to the tectonic-lithologic reservoir,but the reservoir heterogeneity makes the oil-water interface more complex.Through this research recognized follows:There is no uniform oil and water interface and the location of the interface have big difference.The oil and water interface's overall trend is low in the south and high in the north,water distribution is widespread,and gradually increased from north to south.There are many factors influencing the distribution of oil and water.The heterogeneity of reservoir physical properties and the distribution of sandwich is the main controlling factors.Reservoir formation conditions,the nature of crude oil,reservoir modification and other factors also affect the distribution of oil and water in varying degrees.Based on the study of reservoir geologic characteristics,oil-water characteristics and oil-water interface in Hong 003 well area,Select 11 favorable area at last,to the further development and expansion of the expansion has important guiding significance.Obtain the following main achievements and knowledge:1.According to the new data,modified the oil and water logging interpretation chart.The distribution of the oil layer is determined:the porosity distribution range is 19%?34%,the resistivity distribution interval is 20?·m?70?·m,the oil saturation distribution interval is 50%?81%.2.The understanding of the water has undergone three different stages.In the first phase,the study showed that the macroscopic general characteristics of this area belong to the tectonic-lithologic reservoir and distributed in the low structure parts of the southeastern part.After the calculation of the reserves,the side water is not only located in the southeastern part,but also in the eastern part of the region.The third stage is after the study,water distribution is widespread,and gradually increased from north to south.3.The reservoir is a banded distribution,the east and west have changed greatly and the north and south have changed little.There is no uniform oil and water interface and the location of the interface have big difference.The oil and water interface's overall trend is low in the south and high in the north.4.There are many factors influencing the distribution of oil and water.The heterogeneity of reservoir physical properties and the distribution of sandwich is the main controlling factors.Reservoir formation conditions,the nature of crude oil,reservoir modification and other factors also affect the distribution of oil and water in varying degrees.5.The paper studies the effective thickness,porosity,viscosity and water characteristics of oil,and establishes 11 favorable regions of the boundary.