Operator Accesses Previously Unreachable Targets and Improves Average Field ROP by 20%

Published: 11/09/2017

Concrete blue texture
 
Photo: Operator Accesses Previously Unreachable Targets and Improves Average Field ROP by 20% - CTDirect system improves drilling efficiency in tight, abrasive sandstone
The CTDirect coiled tubing directional drilling system successfully drilled more than 3,990 ft in a deep tight-gas sandstone reservoir with high temperatures. The operator reached all previously unachievable geological targets for significantly increased gas recovery. Using the CTDirect system, the operator exceeded the average field ROP by 20%.
Location
Middle East, Asia, Onshore
Details

Application
Underbalanced thru-tubing reentry drilling
 
Geology
Sandstone
 
Hole size
3 5/8 in
 
Length drilled
3,990 ft [1,216 m]
 
Dogleg severity
25°–40°/100 ft
 
Unconfined compressive strength
35,000 psi [241.3 MPa]

Background

In the sandstone layer of an interbedded formation, an operator encountered wellbore stability and BHA sticking issues when drilling openhole laterals with nitrogen-enriched fluid.