METHOD FOR PRESERVING COLLECTING PROPERTIES OF PRODUCTIVE BED WELL-ADJACENT AREA Russian patent published in 2005 - IPC

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes placing alkali waste from kaprolaktam or its solutions production into well as working liquid, in volume not less than volume of pores and/or cracks of productive bed in radius of mudding area from well shaft. Working liquid is pressed into productive bed in saturation mode for this bed along whole thickness thereof. For this saturation of productive bed is performed at pressure of opening of its natural cracks and in cyclic mode of pressure increase, its exposure and pressure drop. This is realized for pressure gradient during loading of productive bed to be 1.1-1.8 times less than pressure gradient during unloading of productive bed.

EFFECT: higher efficiency.

6 cl