Experimental study on chemical profile control technology for shallow heavy oil huff and puff well in Karamay

The METKA system of thermal reversible gel is tested preferentially against well district with serious steam breakthrough by analyzing homogeneity characteristics of shallow heavy oil reservoir in Karamay.The system,recovers liquid when temperature decreases while forms gel when temperature increases again.It allows gap open and closing and regulates seepage discharge to achieve temporary plugging function on basis of temperature vibration.So it is suitable for well field with serious steam breakthrough between wells.In allusion to vertical producing deviation well,authigenic foam profile control technology,which may regulate bad permeability of reservoir efficiently by foam superposition effect,is tested.Reservoir inspiration strength of measure wells increases to17.22 t/(d·m) from 9.95 t/(d·m)(before measurements) on average.So it is suitable for well district with serious contradiction between lays but without obvious steam breakthrough between wells.By field experiment and indoor research and analysis,it shows that,chemical profile control technology for huff and puff well of shallow heavy oil,which may improve inspiration profile of huff and puff well and enlarge sweep range of steam,has good application effect and is able to meet field production requirements.