Reserrch On The Application Of Repeated F Racturing For Old Wells Technology In Jilin Oilfield

In recent years,the proportion of reserves from low permeability and ultra-low permeability reservoir has been more than 60%of new crude oil reserves,Jilin Oilfield is a typical three low oil field,In order to obtain industrial oil and gas flow,Every year a large number of oil and gas well have to hydraulic fractur,Because of the influence of various factors,after fracturing,production of wells will decreases gradually,so repeated fracturing has become an important means to increase production of oil and gas.Repeated fracturing is also one of the important measures for old wells tapping the potential.This technology can restore or increase the yield of oil and gas wells,to improve recovery ratio.Many oil experts pay close attention abou the repeated fracturing technology application prospects.many years ago,the experts had already started the repeated fracturing indoor and field trials abroad.Technical personnel have also done a lot of research work in this area domestic.And achieved some important results.In this paper,starting from repeated fracturing mechanism,Introduced the new progress of the re-fracturing technology at home and abroad,elaborating repeated fracturing diagnosis technology theory.This article Introduce general principles how to choose well and layer based on Cause of failure analysis of fractured wells,research principle of Artificial fractures change direction and Introduce repeated fracturing design method.The preferred method of construction materials as well as the economic evaluation.This article analyzed and summarized by a detailed discussion of fracturing optimization and on-site construction effects,In order to provide a scientific fracturing technology for Jilin Oilfield complex heterogeneous reservoir fracturing.