Method for Hydrodynamic Stimulation of the Bottom of a Seam

摘要

The method can be used in the oil-producing industry for intensifying the production of oil and for increasing the intake capacity during the working of the bottom region of a seam and completion of wells. For producing pressure draw-down and repressuring cycles at the well bottom there is periodically changed the direction of flow of working liquid using controlled movement of jet pump. The value of maximal pressure draw-down is regulated, and periods of pressure draw-down and repressuring action are implemented with equal values of volumes of the inflow and the liquid pumpable into the seam in one cycle. These volumes in each subsequent cycle are increased. The cycles are continued until the increase in the values of the liquid volumes ceases. Chemical reagents are then pumped into the seam. If necessary, the cycles are repeated. The stimulation of the bottom region of the seam is completed with a pressure draw-down.;14 variants of formula.

主权项

1. Method of hydrodynamic stimulation of a bottom region of a seam comprising the steps of lowering to the well of body with jet pump, isolation of hole annulus from internal volume of flow column above the roof of pay zone, periodical change of direction of the flow of working liquid in the well for producing pressure draw-down and repressuring cycles, defining volumes of pumped out liquid at pressure draw-down and introducing fluid pulse to pay zone at repressuring, in this method direction of flow of working liquid in the well is changed at controlled movement of jet pump in the body, maximum pressure draw-down value is adjusted, by amount of volume of pumped into the seam liquid there is defined the period of repressuring action, and periods of pressure draw-down and repressuring action are implemented with equal values of volumes of the inflow and the liquid pumpable into the seam in one cycle, at that stated volumes in each subsequent cycle are increased, the cycles are continued until the increase in the values of the liquid volumes ceases, chemical reagents are then pumped into the seam, if needed these cycles are repeated and the stimulation of the bottom region of the seam is completed with a pressure draw-down.