Logging Evaluation Of Mesozoic Complex Litholog Reservoir Parameters In Fulin Sag

Fulin subsag area is about 360km2,the oil and gas exploration began in 1967,has a total of 40 wells,that including the Dongying group and Shahe Street Group reservoir.Fulin sag is located in Bohai Bay Basin in Jiyang depression.The Jiyang depression is one of the Bohai structures,adjacent to the sea area of the Jiyang depression.After the tectonic movement in Fulin sag formed by the long-term tectonic pattern of the.Fulin subsag Mesozoic strata by Cretaceous and Jurassic.As a whole in Fulin subsag swamp fluvial deposition.It is divided into five lithologic sections: Fangzi formation,three formation,Mengyin formation,west depression formation and Wang group.Fulin subsag Mesozoic reservoir lithology complex reservoir evaluation is difficult.On the basis of coring,core test and drilling logging data in Fulin subsag Mesozoic complex lithologic reservoir were four relationship analysis,lithology identification and shale content,porosity,permeability and water saturation calculation of reservoir parameters,the logging of Fulin sag Mesozoic complex lithologic reservoir evaluation.Four the relationship of Fulin sag Mesozoic complex lithologic reservoir are analyzed.The porosity and permeability of cores are measured by using rock physics experiments.The correlation between rock properties and rock properties is analyzed.It is found that there is a certain correlation between rock properties and physical properties.There is a positive correlation between oil-bearing properties and physical properties of complex lithologic reservoirs in the study area.In the reservoir,the resistivity logging value increases obviously,which proves the positive correlation between oil content and electrical property.Fulin sag Mesozoic complex lithologic reservoir lithology is mainly composed of tuff,andesite and glutenite,micritic dolomite and limestone and calcareous mudstone lithology etc..Different igneous rocks have different logging response characteristics.On the basis of igneous rock logging response characteristics formulated lithology identification method,lithology recognition of the Mesozoic Fulin sag compensation neutron identification and compensation density identification chart chart,get the profiles of lithology identification.Fulin sag Mesozoic complex lithologic reservoir evaluation parameters such as reservoir shale content,porosity,permeability and water saturation etc..The calculation of shale using natural potential method,the calculation of reservoir porosity and permeability calculation and calculation of reservoir water saturation correction of mud content after using Simandoux formula by using acoustic electric combined method using neutron density method.The reservoir in the study area and evaluation of F23,F24,F29,F115,F117 and other 5 joint oil drilling.The average value of porosity is 16.7%,the average value of permeability is 23.5mD,and the average value of water saturation is 92.1%.