Drilling and opening reservoir using an oriented fissure to enhance hydrocarbon flow and method of making
A system and method for increasing hydrocarbon production from a subsurface reservoir by utilizing an intersection of two well bores and a flexible linear cutting device, such as a segmented diamond wire saw, to form a fissure beginning at the intersection of the well bores and extending along a specified the length of the well bores. The ends of the cutting device can be actuated above ground. The shape of the fissure can be a substantially ruled surface defined between the two bores between which the fissure is formed. Configurations for the well bores include both bores extending from the surface and, alternatively, a first bore extending from the surface and a second bore extending from a whipstock in the first bore. The fissure may be located and oriented to maximize the extent of the fissure formed within the hydrocarbon bearing horizon and to intersect with a maximum number of natural and/or previously formed fractures.
1. A well system for a hydrocarbon zone, comprising:
a first bore having proximal and distal ends, the proximal end forming a wellhead;
a second bore having proximal and distal ends;
a first intersection defined by the first bore and the second bore at their respective distal ends; and
a fissure defined between and spanning at least a portion of the length of the first bore and the second bore, the fissure having a distal end at the first intersection of the first and second bores.
2. The hydrocarbon well system of claim 1 , wherein the fissure defines a substantially ruled surface.
3. The hydrocarbon well system of claim 2 , wherein the ruled surface is oriented substantially horizontal.
4. The hydrocarbon well system of claim 2 , wherein at least one of the first bore and the second bore has at least a portion oriented substantially horizontal within the hydrocarbon zone.
5. The hydrocarbon well system of claim 4 , wherein the ruled surface is oriented substantially vertically.
6. The hydrocarbon well system of claim 1 , wherein:
a proximal end of the second bore forms a wellhead; and
an interior angle formed by the first intersection of the first and second bores is an acute angle.
7. The hydrocarbon well system of claim 1 , wherein the proximal end of the second bore forms a second intersection with the first bore at a point between the first intersection and the proximal end of the first bore.