The Grapes In Xujiaweizi Area Of Putaohua Reservoir Study On Oil And Water Layer Identification And Evaluation Method

The Xujiaweizi area is is the key block of oilfield development.The grape flower oil layer and Fuyang oil layer are developed in the area.The main object of this study is the grape flower oil layer.In order to solve the problems of small size of sand body,thin reservoir thickness,high inhomogeneous geological condition,poor porosity and permeability conditions,complicated oil and water relations,this subject is based on the structure and sedimentary characteristics of the study area,using logging,logging,oil test and other data to make full use of light hydrocarbon,nuclear magnetic,gas chromatography,pyrolysis and fluorescence microscopic images.The oil and water relations of the grape flower beds in Xujiaweizi area are identified and evaluated from two aspects,such as the single analysis and comprehensive analysis,and the oil and water interpretation evaluation standard and the productivity evaluation standard are set up in this area,so as to achieve the precise evaluation of the oil reservoir and achieve the purpose of fine interpretation.According to the research on the characteristics of the fluid properties of high mud and high calcium bearing reservoirs and the fluid properties of the thin layer sandstone reservoir,the following achievements have been obtained: according to the ratio parameters of the light hydrocarbon,the distinguishing boundary between the oil layer,the oil water same layer and the water layer is delimited,and the test of the wettability of rock and the relative permeability of oil and water is used to sum up the Xu.The analysis and interpretation standard for the analysis of the phase infiltration under different physical conditions in the family enclosure;the identification of the oil and water layers in the study area by using the oil saturation of the nuclear magnetic analysis parameters;using the multiple analysis parameters of the gas chromatography data(such as the peak shape,the carbon number,the number of the main peaks,the baseline form,the Pr/n C17,the Ph/n C18,the sigma C21-/ Sigma C22+ and so on),through the xujiawei.In recent years,the gas chromatogram of all wells with test oil data in the sub area have been collected and studied.The interpretation standard of oil and water layer in the analysis of domestic and imported gas chromatography in Xujiaweizi area is established,and the interpretation chart of the oil and water layer in Xujiaweizi area is set up by the method of relative area integral of gas chromatography.The fluorescence microscopic image characteristics of Putaohua oil layer in sub block were analyzed.The PS index and oil abundance ST were applied to establish reservoir identification and evaluate reservoir standard.On this basis,the interpretation charts for oiland water layers of high mud and high calcium reservoirs were established respectively,and the logging interpretation criteria for each reservoir were summarized.