Research On Multifunctional Foam Flooding Technology After Multi Cycle Of Huff And Puff In Jin 45 Heavy Oil Block

Jin 45 is the biggest heavy oil block in Liaohe oil field, it is a typical multilayer reservoir with edge and bottom water, after multiple rounds of stimulation, existing the following problem: steam huff and puff round high, steam injection effect is poor,reservoir heterogeneity is strong, longitudinally imbalance, the viscosity of crude oil is increasing year by year, the effect of steam huff and puff variation. In view of the above problems,put forward the profile control technology, cleanup technology and viscosity reduction technology of combination of ideas, the first, screening of foaming agent, then, compound the selected foaming agents and many kinds of surface active agent and auxiliaries agent,made a "wash oil, profile control, viscosity reduction" three effect one foam flooding system, master the main influencing factors of foam stability and generation and transmission mechanism in porous media through the experiment, increasing yield effect is obvious after the field test, to meet the needs of efficient production of oil wells at the late stage of cyclic steam stimulation, the technological achievements have the broad application prospects.