Research On The Method Of Determining The Oil Saturation Of Special Reservoir

The subject of integrated core properties,mercury injection and relative permeability and well logging data of volcanic rock reservoir with low porosity and low permeability reservoir,low resistivity reservoirs,low saturation reservoir oil saturation determination method to conduct the thorough research,and summarizes the oil for the local area,different kinds of reservoir saturation determination method in order to improve the accuracy of oil saturation calculation lays a foundation.Through the research,obtains the following main results:(1)according to the different oil saturation of reservoir influence factor research thinks: effect of low porosity and low permeability reservoir is mainly affected by the oil saturation of reservoir physical properties and cement composition;oil saturation of low resistivity reservoirs are mainly controlled by the high shale content,pyrite,such as conducting density difference between oil and water reservoir properties and logging,logging series environmental and other non reservoir properties influence;low saturated oil saturation of reservoirs is mainly affected by the oil column height and poor reservoir property,effect of volcano rock oil saturation in reservoir is mainly controlled by the pore structure,oil column height and fracture;(2)according to the mercury and physical property,and thin core analysis data,combined with geological,reservoir and logging data,the low porosity and low permeability reservoir,low resistivity oil layers,low saturation reservoir and volcanic reservoir of reservoir types,and to determine the reservoir classification standard;(3)the use of mercury and reliable data on the relative permeability,low porosity and low permeability reservoir,low resistivity oil layers,low saturation reservoir and volcano rock reservoir oil saturation is studied,and draw the corresponding saturation model;(4)based on the reservoir classification,of low porosity and low permeability reservoir,low resistivity oil layers,low saturation reservoir and volcanic reservoir rock electro parameters were studied,and draw the electrical parameters of rocks of different types of reservoirs,provides a reliable basis for reasonably determining the oil saturation of reservoir;(5)through the practical application,has achieved good effect,the results of oil saturation interpretation achieved precision of reserves requirements.