Research On Gas Reservoir Evaluation Of RPM Logging In Yaha Oil And Gas Field

With the continuous deepening of oilfield exploration and development work and the deepening of understanding of oil and gas fields,the research goal of oil and gas has gradually shifted from a relatively single high-amplitude structural oil and gas reservoir to low porosity and low permeability,low resistivity,complex lithology and complexity.Transformation of complex oil and gas reservoirs such as storage space.After the oil field is developed,the production of oil and gas wells will decrease as the water saturation of the formation rises,especially after water injection,the water content will increase a lot.At this time,the structure of the reservoir will undergo complex changes and require Re-monitoring the oil saturation of the reservoir,through dynamic monitoring to understand the water flooding of the formation,is of great significance to guide the rational and efficient development of the oil field in the later period and increase the rate of oil production.Due to the characteristics of casing,the logging method of open hole wells cannot be used for formation evaluation of casing wells.At present,the saturation logging method based on the principle of pulse neutron logging is basically used in casing wells.In order to solve the problem of remaining oil evaluation in the Yaha oil and gas field area,it is necessary to use the new remaining oil saturation logging interpretation evaluation technology that is more suitable for geological conditions to find potential layers and provide a strong basis for adjustment and judgment of potential layers in the middle and late stages of oilfield development.The RPM(Reservior Performance Monitor)logging technology is currently the main means to effectively identify the distribution law of oil and water,understand the water injection and liquid production profiles,adjust the injection and production plan,and improve the recovery factor.In order to study the applicability of the RPM interpretation method in the Yaha oil and gas field,this paper uses Monte Carlo numerical simulation and actual logging data to study the RPM interpretation method.First,a statistical analysis of the salinity,porosity,and shale content of the formation water of the Yaha oil and gas field was carried out to obtain the relevant formation parameters of the Yaha oil and gas field,and to establish the Monte Carlo based on the RPM logging instrument parameters under the condition of 5.5in inch casing.The Carlo model simulates the Yaha block.According to the simulation results,the influencing factors of the RPM logging tool are analyzed.The results show that the salinity of formation water has a relatively large influence on the Sigma value of the macroscopic capture cross-section of the formation.When analyzing formation water with high salinity,it needs to be corrected.In the remaining oil saturation evaluation part,this paper compares and analyzes the existing fluid qualitative identification and quantitative calculation of water saturation at home and abroad,proposes a variable parameter correction model method suitable for the Yaha oil and gas field,and conducts the RPM interpretation method for the Yaha oil and gas field.application.