Method for determining the depth of a Hydraulic Fracture Zone in the Earth

摘要

The present Invention relates to the method for determining the depth of a Hydraulic Fracture Zone next to a Pit Hole in the application of Hydraulic pressure inside theA Well Hole to cause The Fracturing of the Geological Environment around the hole.Which includes or is the application of Hydraulic pressure within a previously hydraulically fractured well.While the Orifice of the pot still is pressurized.A Motion detector positioned in Spaced Depths between the hole for a time following the Cessation of the application of Hydraulic pressureThese Depths extending vertically over at least a Vertical Limit of the area of the vertical extension of the early Fracture; B.Receive and record the Movement of the Seismic Wave for a period of time at each depth.Taking the motion of the Wave pressurization combined with a background level induced by pressure with two horizontal Component and a vertical component and that Component;Is Movement of sources that are not attributable to The Fracturing, C.Analyze the Records of Movement at each depth, including: (1) to eliminate the Motion Components are not attributable to The Fracturing.(2) to determine the level of average Fund Movement for the two components combined horizontal and the vertical component of Motion measured by the motion detector; and (3).Rar the level of average Fund Movement for the horizontal components of Motion combined with the vertical component of movementSo the ratio of horizontal to vertical component provides an indication of the presence or absence of fracturing in such depth.