Main Controlling Factors And Favorable Blocks Optimization Of Jurassic Reservoirs In YC Area

With the continuous improvement of the global oil and gas exploration level,the probability of the large integral structure oil and gas reservoirs is becoming smaller and smaller,and the exploration targets gradually change to the micro oil and gas reservoirs including the lithologic oil and gas reservoirs.The Ordos Basin is rich in oil and gas resources,and the YC area is located in the western margin thrust belt of the basin.The inner Jurassic reservoir in the basin has many oil-bearing strata,but the reservoir size is small,the sand body changes quickly,the structure changes greatly,and the exploration difficulty is increased.In view of this,this paper studies the main controlling factors of the accumulation of Jurassic reservoir in YC area,establishes a reservoir forming model,and selects the favorable area of productivity construction,which is of great theoretical significance to the scientific,effective and rapid development of the "small and fat" Jurassic reservoir.In view of the main controlling factors of reservoir formation in the Jurassic reservoir in YC area,the source rock,reservoir,cover layer and oil and gas migration and protection of the reservoir in this area are analyzed from the conditions of reservoir formation.The leading factors of reservoir formation in the study area are paleogomorphic features,sedimentary facies characteristics,construction characteristics and differential compaction diagenesis.Control factors.The stratigraphic division and contrast are carried out by the small layer contrast method,and the palaeoggeomorphology is restored by the "impression method",the sedimentary facies is analyzed on the basis of core and log data,the formation microstructures are described,the types of differential compaction are studied,and the main controlling factors of the reservoir formation in the YC area are deeply studied,thus the oil and gas migration patterns in the study area have been studied.Preliminary understanding,clear oil and gas migration direction,on this basis,combined with the paleogomorphic map and the characteristics of the discovered reservoir distribution,sum up the distribution law of the reservoir,and establish the reservoir forming model.On the basis of the above research results,the selection principle of favorable area is put forward,and three key blocks are selected: the source of the secondary channel,the two sides of the fault and the developing area of sand body.According to the data of the effective thickness of the sedimentary and sandstone,the logging display,the well logging interpretation,and based on the features of the paleogomorphology,the classification standard of the favorable area is made,from this In these areas,three types of favorable blocks for production and construction are found.The stratified location is used to evaluate and predict the favorable areas.Finally,the corresponding deployment proposals are put forward based on the classification results.