Geological Characteristics And Well Pattern Optimization Of Xinglongtai Oil Reservior In Huan127 Block

In the oil industry development era,heavy oil resources in possession of the current geological reserves in an increasingly large proportion,so how to improve heavy oil recovery,the implementation of efficient development has become a priority among priorities in the world petroleum people continue to study.Huan 127 block located in East San Yi Cun Jin county of Jinzhou City,located in the upper part of the western slope of the Western Sag of Liaohe fault depression,At the end of 2012,in order to further improve the recovery rate of Xinglongtai reservoir in Huan 127 block,and ensure the development effect,the gravity drainage auxiliary steam flooding test was carried out in Xinglongtai reservoir of Huan 127 Xi block,During the test,because of the block by sedimentary facies,geological structure,physical properties of crude oil and other factors,testing well group injection is relatively low,drainage and reduce pressure and poor phenomenon,the test result of steam drive is not obvious.Therefore,we have a new understanding of the geological characteristics of the development of the block,and on the basis of understanding,we have carried out the optimal design of the steam drive drainage,depressurization and well pattern.In this paper,we use the existing logging data,at the same time with the fine interpretation of seismic technology on the basis of previous studies to re implement the block structure,carry out geologic strata contrast,further implement reservoir thickness,reservoir development,permeability,porosity,layer angle,interlayer distribution and sedimentary facies factors on the influence of test well group steam flooding.At the same time,remaining oil research method is used to summarize the remaining oil and its distribution,and to evaluate the effect of development,The expansion state and influencing factors of steam cavity in production stage of steam flooding are analyzed.Combined with the actual situation of the block structure and sand body distribution,calculation of reservoir single well liquid production capacity by using reservoir engineering method and seepage mechanics method,calculation of horizontal well injection production well spacing and reservoir vertical depth,research of horizontal-horizontal well,horizontal well-vertical well and vertical well-vertical well,etc the influence of different well spacing for steam cavity formation,compare and select the three-dimensional distribution optimization design of injection well and production parameter optimization for Huan 127 block of steam flooding well pattern and related note.Finally,the annular wells preferred to increase the proportion of injection wells,can further improve the production injection ratio,and water drainage,good results have been achieved in the field test,it plays a positive guiding role in the same type of reservoir.