초록

Methods and apparatus for creating as shear ("S") wave for use in oil and gas exploration, where such S-wave is created by detonating an explosive packaging in a shot hole in a manner that produces directionally controlled S-wave force vectors at each source station across a 3-D survey grid.

대표청구항 ▼

[ I claim:] [12.] An apparatus for imaging the subterranean below the surface in the vicinity of a shot point, the apparatus comprising:(a) a first shot hole penetrating the subterranean, and positioned along a source line on the surface;(b) a first explosive package oriented to create upon detonati

[ I claim:] [12.] An apparatus for imaging the subterranean below the surface in the vicinity of a shot point, the apparatus comprising:(a) a first shot hole penetrating the subterranean, and positioned along a source line on the surface;(b) a first explosive package oriented to create upon detonation a horizontal force vector oriented within an angle .DELTA..THETA. relative to the first shot hole and along a first inline direction parallel to the source line;(c) a second shot hole penetrating the subterranean, and positioned along the source line;(d) a second explosive package oriented to create upon detonation a horizontal force vector oriented within an angle .DELTA..THETA. relative to the second shot hole and along a second inline direction parallel to the source line and opposite the first inline direction;(e) a third shot hole penetrating the subterranean, and positioned along the source line;(f) a third explosive package oriented to create upon detonation a horizontal force vector oriented within an angle .DELTA..THETA. relative to the third shot hole and along a first crossline direction perpendicular to the source line;(g) a fourth shot hole penetrating the subterranean, and positioned along the source line;(h) a fourth explosive package oriented to create upon detonation a horizontal force vector oriented within an angle .DELTA..THETA. relative to the fourth shot hole and along a second crossline direction perpendicular to the source line and opposite the first crossline direction;(i) a fifth shot hole penetrating the subterranean and positioned along the source line; and(j) a fifth explosive package oriented to create upon detonation, a vertical force vector.