Combined well system and method for enhanced production

Abstract

A combined well system which may comprise two or more wells. The wells may be connected in the subterranean earth. Fracking operations may be initiated from the wellhead of one well towards the toe section of a second well. The combined well system may allow for enhanced production by altering pressure drawdown in the toe sections of long lateral wells.

What is claimed is: 
     
         1 . A combined well system, the system comprising:
 a first well, the first well comprising:
 a first casing segment, wherein the first casing segment has a first toe end; 
   a second well, the second well comprising:
 a second casing segment, wherein the second casing segment has a second toe end; and 
 a connector, wherein the connector connects the first toe end and the second toe end thereby connecting the first casing segment to the second casing segment. 
   
     
     
         2 . The combined well system of  claim 1 , wherein the connected first casing segment and second casing segments provides a hydraulic and mechanical communication from a second surface of the second well to a first surface of the first well. 
     
     
         3 . The combined well system of  claim 1 , further comprising an isolation plug. 
     
     
         4 . The combined well system of  claim 3 , wherein the isolation plug partitions the combined well system into two regions. 
     
     
         5 . The combined well system of  claim 4 , wherein a first region of the two regions is designated for a first well operations and a second region of the two regions is designated for a second well operations. 
     
     
         6 . The combined well system of  claim 4 , wherein a fracking operation and a production operation occur on both sides of the isolation plug. 
     
     
         7 . The combined well system of  claim 4 , wherein the isolation plug isolates a production operation from an injection operation. 
     
     
         8 . The combined well system of  claim 4 , wherein a first region of the separate regions has a first drawdown pressure and a second region of the separate regions has a second drawdown pressure. 
     
     
         9 . The combined well system of  claim 8 , wherein the first drawdown pressure creates a first flow regime to the first well and the second drawdown pressure creates a second flow regime to the second well. 
     
     
         10 . The combined well system of  claim 3 , wherein the isolation plug allows no operational interference between the first well and the second well. 
     
     
         11 . The combined well system of  claim 1 , wherein a first well drawdown pressure and a second well drawdown pressure may be applied to the combined well system. 
     
     
         12 . A method of forming a combined well system, the method comprising the steps of:
 drilling a first well to a pinpoint target coordinates, via a first bottom hole assembly;   drilling a second well to the pinpoint target coordinates, via a second bottom hole assembly; and   connecting the first well to the second well.   
     
     
         13 . The method of forming a combined well system of  claim 12  further comprising:
 placing a first casing segment in the first well and a second casing segment in the second well, wherein a first toe end of the first well is positioned at the pinpoint target coordinates; and 
 connecting the first casing segment to the second casing segment, via a connector. 
 
     
     
         14 . The method of forming a combined well system of  claim 12  further comprising:
 setting an isolation plug along the first casing segment or the second casing segment. 
 
     
     
         15 . The method of forming combined well system of  claim 12 , the method further comprising:
 drilling a rat hole at a first toe end of the first casing segment;   deploying a spotted tracer pill into the rat hole;   detecting the spotted tracer pill, via a ranging sensor on the second bottom hole assembly;   calculating, via a control unit, a ranging and distance coordinates between the spotted tracer pill and a second bottom hole assembly coordinates; and   adjusting the second bottom hole assembly towards the rat hole based on the ranging and distance coordinates.   
     
     
         16 . The method of forming the combined well system of  claim 12  wherein the first bottom hole assembly drills to the pinpoint target coordinates at a high angle, low angle, or horizontal approach. 
     
     
         17 . The method of forming a combined well system of  claim 12  further comprising:
 performing a plug, perforate, and frack sequence, wherein the plug, perforate, and frack sequence comprises:
 plugging at least one target area; 
 perforating the at least one target area; and 
 fracking the at least one target area.