Research And Application Of Deep Formation Sand Control Technology In A Wellblock Of Liao He Oilfield

A wellblock belongs to a side small liaohe depression oilfield production of heavy oil block The block reservoir shale content as high as 25.1%,the average median size 0.22 mm,loose cementation and viscosity of crude oil up to 35000 c P influencing development effect is the main contradiction of wellblock as well a lot of fine sand,secondary development,the total of 22 sand production Wells,single well sand return on average volume of 9.1 m3,production cycle average sand washing pump inspection is 7.1 times,the average pump inspection cycle is 37 days depression A wellblock steam stimulation method put into production in 1993,reaching annual peak in 1995,high steam injection pressure,oil well sand production after oil well production,Until 2009,parts of oil Wells of block was restored by sand control technology upgrade,but most blocks in reserves has not been used in order to solve the block sand production,production will be able to use the problem,we summarize the original sand control technology in the analysis on the basis of the formation of deep sand control technologyDeep formation sand control technology is the artificial borehole wall and end sand-out mutual confluence of a kind of technology,it adopts a kind of high temperature resistant resin coated sand as support material,and choose a particular screen at the end of the sand filling tube forming secondary sand barrier,achieve the block combined with sand control purpose,research and its purpose is to improve the artificial borehole wall resistance to high temperature erosion and corrosion resistant ability,shorten the operation cycle,decrease the cost of measures In addition,the technology also is added in the preflush solution composition,to achieve the goal of integration of sand fracturing broken down This research from fracturing end sand-out and artificial borehole wall sand control mechanism,this paper comprehensive analysis the pools A the reservoir characteristics of reservoir and sand producing reason,research and construction technology of sand control material system,eventually forming the characteristics of sand is suitable for hollow A wellblock of sand control technology Through the application of this technology in the field,the technology can effectively alleviate the problems,formation sand production,ensure the daily production of oil Wells,for hollow A wellblock secondary development laid a solid foundation,sand control in similar block,have certain reference significance.