Research And Application On Jingan Low Permeability Oilfield Water Injection Well Deep Profile Control Technology

Deep Profile Control Technology,which was put forward in last ten years20th century, has became a heated theory used by many petroleum institutions and oil company and a great number of achievements have been applied into practical working.Colloidal Dispersion Gel Deep Profile Control Technology is a newly developed method which will improve oil displacement efficiency in polymer flooding. The concept of Colloidal Dispersion Gel was invented by Mack and Smith. who identified low density of crosslink system of polyacrylamide and aluminium citrate as In-depth Colloidal Dispersion Gel.Colloidal Dispersion Gel Deep Profile Control Technology’s main function is changing fluid’sflowing direction and enlarging affecting parameters.After low density of polyacrylamide and aluminium is Injected into anistrope reservoir, polymer and crosslinking agent is changed into the molecule inner crosslinked Colloidal Dispersion Gel.If liquid of Colloidal Dispersion Gel is densitied,then this fluid has the function of oil displacement like polymer and finally enhance the recovery of low permeability reservoir.In CaiSan,the oil production of Water-injected reservoir stands98.8%of the total production. However, the newly developed oil section such as JingAn Chang6、 Yuan48Chang4+5、Wu93Chang6appears Flooding phenomenon,especially in JingAnWuliwan oil section which has injected water for nearly10years.In early water-injected oil section,the water flooding is apparent,therefore,it’s essential to apply the profile control technology into practice for high recovery efficiency of reservoir.