Study On Secondary Logging Interpretation Of Chang 2 Reservoir In T Oilfield

Logging data and its interpretation is one of the most important basic data for understanding of reservoir and developing oil field.Specification for harmonized well logging interpretation plays a decisive role in fine reservoir characterization and reservoir development.There are some problems in Chang 2 reservoirs in T oilfied in Ordos basin,such as year span of these logging and uniform logging interpretation model.In this paper,according to core analysis,logging data,testing and production test information,combined with characteristics of low porosity and low permeability reservoir to conduct a system study of logging interpretation method for the study area.In this paper,applying log interpretation and core analysis technology,using a variety of information such as reservoir geology,logging data,testing and production test information.By analysing the reservoir four-properties characteristics and relationship to studying on the method of establishing model of reservoir interpretation such as lithology and shale content,fluid properties and saturation,porosity and permeability.Determining the lower limit standard of effective reservoir and studyind on the characteristics of porosity and permeability distribution.By analysing of the core data,study on the reservoir of minerals and rocks and porosity and permeability characteristics.Analysis the reservoir feature of lithology,electrical properties,physical properties and oil-bearing properties.Establishing the relation of lithology and electrical,lithology and physical property,physical properties and electrical and oil-bearing and electrical.The study can be obtained the good correlation between natural gamma ray and clay content,porosity and acoustic time.Optimization of crossplot approach,it can identify boundaries standards of different lithologic.Establishing the interpretation of shale content by optimizing the gamma method from three ways.Optimization of crossplot approach to establish the relationship between oil and water layer plate of resistivity and acoustic time,natural gamma.Ultimately concluded the interpretation standards of reservoir fluid nature and optimizing Archie formula method to establish the saturation model from three ways.By the core analysis porosity and acoustic time to establish porosity interpretation model.Optimizing the relationship between permeability and porosity to obtain permeability interpretation model from four ways.Determining the lower limit standard of effective reservoir.Applying the optimization model to make the secondary interpretation and finging the missing oil and gas layer in the firstly interpretation.And research on the characteristics of physical properties distribution.On the basis of the basic characteristics of the study area,the interpretation methods for the study area were optimized.Optimizating a set of logging interpretation models suitable for the study area of geological and fluid characteristics.Determining the lower limit standard of effective reservoir.Applying the optimization model to make the secondary interpretation and finging the missing oil and gas layer in the firstly interpretation.And analyzing the characteristics of physical properties distribution of reservoir.Logging interpretation results indicated that the interpretation models were optimizated with high precision.And it can be used better in well logging interpretation in the study area.Improving the logging interpretation accuracy and reliability.It will provide an important basis for the evaluation of reserves and preparation of development programme.