MIXTURE TO INCREASE OIL LAYER RECOVERY

摘要

The invention is intended for use in the petroleum industry as a gelatinous agent during refining of the oil fields by means of flooding. The proposed mixture provides for increased recovery of the oil layers for a wide range of layer temperatures including the highest, by redistributing the filtration flows and increasing the conformance of the flooded layer. The basic components of the mixture are cellulose and water esters, whereby the cellulose esters are esters with a low critical dissolution point, used in addition to carbamide or thiocarbamide, or ammonium thiocyanate, or a mixture of these elements according to the following proportions (in molecular weight): ester with a low critical solution point (.25 to 2.0); carbamide (2.0 to 20.0); thiocarbamide (.5 to 2.0); ammonium thiocyanate (.5 to 2.0); and water (the remainder). It is preferable to use methylcellulose or methyloxypropylcellulose as the cellulose esters with a low critical solution point.