3D Geological Modeling Of Upper Submember Of Es3 In The Second Block Of Shanghe Oilfield

The Shanghe Oilfield is divided into four blocks from north to south of the first block,the second block,the third block and the fourth block.Among them,the oil-bearing layer of the second bolck is concentrated in the second and fourth sections of Shahejie Formation.Upper submember of Es3 locked enough attentin and systematic research in the development of more than forty years.Using the data such as core,logging and earthquake,this paper has carried out the study of reservoir subdivision and contrast,fine structural explanation,sedimentary microfacies study and reservoir characteristics.On this basis,the paper established a three-dimensional geological model.Firstly,on the basis of the logging data and seismic data,the paper applied"sedimentary cycles-lithologic thickness contrast method"and"equal height sedimentation unit comparison method"to dividing upper submember of Es3 into five sand layer groups and twenty two small layers and then established fine stratigraphic framework.Secondly,based on the seismic data,the paper apllied the method of joint interpretation of logging seismic to explaining the fine structure of the study area.The paper identified twelve faults which included six low-order faults?fourth or fifth level?and describe the spatial distribution of the main faults systematically.Thirdly,based on the description and analysis of the core observation and the measured datas,the paper studied the sedimentary microfacies.It is concluded that the study area is mainly developed delta front subfacies and turbidite sediments.Comprehensive microscopic observation,scanning electron microscopy and laboratory analysis data,the paper analyzed the reservoir characteristics of the study area.The results showed that the main stratums is mainly composed of feldspinsitic quartz sandstone and lithofacies sandstone and the porosity 20%to27%,the permeability distributed in the generally 25 to 400×10^-3?m²,belonged to the middle hole in the reservoir.Based on the above research results,the paper established the three-dimensional geological model of the study area using Peterl software,which provided reliable geological basis for the adjustment of the development programs of the study area.