Development Geological Characteristics And Polymer Flooding Dynamic Adjustment Method Of Middle Block Oil Reservoir In Nan 1 Area Of Daqing Oilfield

Saertu structure is a short axis anticline in the northern part of Changyuan,Daqing.The development area of Shah is located in the central part of the Saertu structure.The south one is located in the south part of the SA Zhong development area,and the south one block is located in the central part of the south part.The Southern District in Portugal a group of major reservoirs in the block size of channel sand in the south area in the middle,a higher proportion of connectivity between wells,in the early development of the development effect of polymer injection did not reach the expected effect,to early rule of block polymer injection was studied.Through the analysis of the factors of effective wells and wells has no effect and summarizes the reasonable block tracking and method to adjust the direction,to evaluate the different stages of development measures of effect,based on indoor experimental measures,reasonable methods,to ensure the rapid and efficient development of gas field.Polymer flooding technology is a more feasible technology to improve the recovery rate in chemical flooding.At first,based on the relationship between the number of capillary and the efficiency of oil displacement,it is believed that polymer flooding can not improve the oil displacement efficiency and reduce the residual oil saturation.The results of laboratory research and field application in Daqing show that polymer flooding is an effective method to improve oil recovery.The Southern District in the block due to blank water flooding after polymer flooding time,dynamic response characteristics and the existing block is different,showing the water drop slowly,the decline of small features,in order to improve the block development effect,make adjustments to adapt the methods in different water cut stages,signed by to a block of polymer flooding reservoir development experience,based on fine geologic research block,logging curve,injection,production profile data,different prosodic features,a kind of poly phase reservoir heterogeneity,different injection condition,water level,flow pressure,effective rules well under the conditions of accumulation;according to the injection end the adjustment and oil well effect,research on the reasonable wells adjustment method;carry out a kind of reservoir in different stage of water cut oil wells measures(fracturing,stratification,water plugging and profile)effect evaluation Price,combined with numerical simulation method of tracking measure effect;carry out polymer flooding experiment on different prosodic features of permeability under the condition of poly phase profile control and flooding injection cycle of different polymer(reasonable time period,Slug,the size and the reasonable injection parameters of the oil displacement effect).While ensuring the rational development of the block,it provides reference for the development of other similar blocks.