Method of increasing productivity and recovery of wells in oil and gas fields
OwnerLeon Marmorshteyn, James Franklininventors
Life of this patent
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Abstract
A method of increasing productivity and recovery of wells in oil and gas fields includes determining a direction of maximal horizontal stresses, producing at least two wells so that they are spaced from one another in a direction corresponding to the direction of the maximum horizontal stresses, forming in at least one of the wells at least one vertical slot oriented substantially from the at least one well to the other of the wells, and introducing a hydrofracturing fluid at least into the at least one well to produce a hydraulic fracture in direction from the at least one well to the other well.
Claims12
A method of increasing productivity and recovery of wells in oil and gas fields, comprising the steps of determining a direction of maximal horizontal stresses;
- producing at least two wells so that they are spaced from one another in a direction corresponding to the direction of the maximum horizontal stresses;
- forming in at least one of the wells at least one vertical slot oriented substantially from said at least one well to the other of the wells;
- introducing a hydrofracturing fluid at least into said at least one well to produce a hydraulic fracture in a direction from said at least one well to said other well;
- and further comprising analyzing a plurality of layers;
- and performing the production of the wells and formation of the slot in a layer-which has a greatest saturation with oil or gas, and a greatest capacity of oil or gas.
A method of increasing productivity and recovery of wells in oil and gas fields, comprising the steps of determining a direction of maximal horizontal stresses;
- producing at least two wells so that they are spaced from one another in a direction corresponding to the direction of the maximum horizontal stresses;
- forming in at least one of the wells at least one vertical slot oriented substantially from said at least one well to the other of the wells;
- introducing a hydrofracturing fluid at least into said at least one well to produce a hydraulic fracture in a direction from said at least one well to said other well;
- and further comprising forming at least one additional slot which is oriented substantially perpendicular to said first mentioned slot and has a length substantially corresponding to 20–50% of a length of said first mentioned slot.
A method of increasing productivity and recovery of wells in oil and gas fields, comprising the steps of determining a direction of maximal horizontal stresses;
- producing at least two wells so that they are spaced from one another in a direction corresponding to the direction of the maximum horizontal stresses;
- forming in at least one of the wells at least one vertical slot oriented substantially from said at least one well to the other of the wells;
- introducing a hydrofracturing fluid at least into said at least one well to produce a hydraulic fracture in a direction from said at least one well to said other well, wherein said forming of the slot includes forming the slot with a slot forming medium;
- and supplying the slot-forming medium with a maximum pressure producible by an equipment located on a ground.
Dependencies are inferred from the claim text.