Research Oil Reservoir Description On Shu 1-27-454 Block Xing Long Tai Layer

The Shu 1-27-454 block began to develop steam huff and puff since 1998.The whole block is mainly produced by direct well production,which has gone through the development of steam huff and puff for more than ten years.It has already entered the low efficiency production stage of the high wheel.There are severe steam channeling,low well mobility,low well condition,low opening rate,low formation pressure,poor fluid supply capacity and continued huff and puff.The potential is limited,we need to explore the next step replacement mode,carry out fine reservoir description research,update oil reservoir understanding,and provide theoretical basis for follow-up work.Based on the information of high resolution sequence stratigraphy,using the information of the change of lake water in this area,the comparative standard layer of the whole area is identified,and the small layers are compared with the comprehensive logging curve of 1:200,and 18 small layers are divided on the basis of sedimentary cycle.The single phase analysis of sedimentary facies and sedimentary microfacies is used to use the core well,and the latest seismic data interpretation area is applied.The block structure features form the overall understanding of the block,and then the logging data are combined to analyze the sedimentary characteristics,sandstone distribution characteristics,reservoir development characteristics,the distribution characteristics of intercalated intercalation,and the characteristics of the oil layer,and the calculation of reserves is determined by the analysis of core description and material data,and the volume method is adopted and the block is used in the plane.According to the two units of Xing VI group and Xing I~ IV group,we calculate the reserves and oil area of blocks.In the course of the study,there are several points of understanding: the difference in the development degree of sandstone in the small layers is large,which is controlled by sedimentary microfacies;the reservoir is medium thick and thick,mainly due to the period of basin expansion,and the distribution range of the basin is continuously enlarged at this time,while the basin is stretched,the basin subsidence is obvious.The growth degree of each layer has an effect on the development mode,and the complex parts near the denudation area and the oil water relationship are suitable for the single well huff and puff way,and the high degree of filling of the oil layer is suitable for multi mode and multi well mining.