Surface close proximity wells

Abstract

An offshore oil production system, comprising a structure in a body of water, having a portion extending above a surface of the body of water; a first surface wellhead located at a top of the body of water; a second surface wellhead located at a top of the body of water; a first wellhead located at a bottom of the body of water; a second wellhead located at a bottom of the body of water; a first riser extending from the first wellhead to the first surface wellhead; and a second riser extending from the second wellhead to the second surface wellhead; wherein the first surface wellhead is a distance of less than about 12 feet from the second surface wellhead.

1 . An offshore oil production system, comprising:
 a structure in a body of water, having a portion extending above a surface of the body of water;   a first surface wellhead located at a top of the body of water;   a second surface wellhead located at a top of the body of water;   a first wellhead located at a bottom of the body of water;   a second wellhead located at a bottom of the body of water;   a first riser extending from the first wellhead to the first surface wellhead; and   a second riser extending from the second wellhead to the second surface wellhead;   wherein the first surface wellhead is a distance of less than about 12 feet from the second surface wellhead.   
     
     
         2 . The system of  claim 1 , further comprising a first wellbore extending further into a subsea formation beneath the body of water and beneath the first wellhead, and further comprising a second wellbore extending further into the subsea formation beneath the body of water and beneath the second wellhead. 
     
     
         3 . The system of  claim 2 , further comprising a production tubing within each of the first wellbore and the second wellbore. 
     
     
         4 . The system of  claim 3 , wherein each production tubing extends from the first wellbore to the first surface wellhead and from the second wellbore to the second surface wellhead. 
     
     
         5 . The system of  claim 1 , further comprising a tensioner connected to the structure in the body of water, and connected to both the first riser and the second riser. 
     
     
         6 . The system of  claim 1 , wherein the first riser and the second riser are located in a single wellbay slot on the structure. 
     
     
         7 . The system of  claim 2 , wherein the first wellbore further comprises a casing string. 
     
     
         8 . The system of  claim 1 , wherein the first surface wellhead comprises a first surface tree, and wherein the second surface wellhead comprises a second surface tree. 
     
     
         9 . The system of  claim 1 , wherein the structure comprises a tension leg platform. 
     
     
         10 . The system of  claim 1 , wherein the structure comprises a spar platform. 
     
     
         11 . The system of  claim 1 , wherein a center of the first surface wellhead is a distance of from about 2 to about 10 feet from a center of the second surface wellhead.