Coiled-Tubing Underbalanced Drilling Applications in the Lisburne Field, Alaska

2007 ◽  
Author(s):  
Mark Olaf Johnson ◽  
Patrick Richard Brand ◽  
Samuel French ◽  
Jon Greggory Sarber ◽  
David L. Hildreth ◽  
...  
Keyword(s):  
Coiled Tubing ◽  
Underbalanced Drilling

Feasibility Study of Underbalanced Drilling Using Coiled Tubing (CT-UBD): A Case Study of Field A, Indonesia

2013 ◽  
Author(s):  
Lamdamatra Arliyando ◽  
Samuel Sinaga ◽  
Gde Valdy Arimbawa ◽  
Bonar Tua Halomoan Marbun
Keyword(s):  
Feasibility Study ◽  
Coiled Tubing ◽  
Underbalanced Drilling

Improving the Efficiency of Gas-Storage-Well Completions Using Underbalanced Drilling With Coiled Tubing

2005 ◽  
Author(s):  
James Weber ◽  
David William Stilson ◽  
Donald W. McClatchie ◽  
Stewart L. Denton ◽  
Lee Russell King
Keyword(s):  
Gas Storage ◽  
Coiled Tubing ◽  
Underbalanced Drilling ◽  
Well Completions

Unlocking Oman's Tight Gas Potential using State-of-the-Art Underbalanced Coiled Tubing Drilling Technologies

2021 ◽  
Author(s):  
Stephen Lynn ◽  
Sumith Manoharan ◽  
Souhaibe Barkat ◽  
Saleh Al-Ruzeiqi ◽  
Yan Terras ◽  
...  
Keyword(s):  
State Of The Art ◽  
Integrated Management ◽  
Tight Gas ◽  
Rotary Drilling ◽  
Fully Integrated ◽  
Coiled Tubing ◽  
Underbalanced Drilling ◽  
Drilling Tools ◽  
Energy Service ◽  
Gas Potential

Abstract With the large amount of tight gas reserves remaining in Oman, new innovative techniques and methods to unlock these reserves have become imperative for the future economic success and stability of the country. Among the various technologies considered, the concept of underbalanced coiled tubing drilling (UBCTD) was introduced. In order to address the harsh downhole challenges such as high temperatures, deep burial depths, under pressured reservoirs, abrasive and hard sands and logistical constraints; a fully integrated well delivery solution was developed jointly by the operator and energy service company. In accordance with this strategy, best in class downhole drilling tools, a state-of-the-art fully automated coiled tubing drilling unit together with technical and project management experts were deployed. Application specific solutions to the challenging subsurface conditions included utilization of underbalanced drilling (UBD) techniques, deployment of high temperature drilling assemblies, fit-for-purpose bit drive mechanism and a robust integrated management system. All of the above was achieved whilst ensuring the safety of all personnel during the project and reducing carbon emissions through a flare minimization strategy and diesel consumption reduction initiatives. Over the course of the pilot campaign, reservoir exposure per well was doubled, average penetration rate compared to conventional rotary drilling was more than tripled and incremental production improvements of up to 230% were observed. This paper discusses the challenges faced and the solutions implemented during this three well pilot campaign.

An experimental system for coiled tubing partial underbalanced drilling (CT-PUBD) technique

2018 ◽  
Vol 89 (5) ◽  
pp. 055108 ◽  
Author(s):  
H. Z. Shi ◽  
Z. S. Ji ◽  
H. Q. Zhao ◽  
Z. L. Chen ◽  
H. Z. Zhang
Keyword(s):  
Experimental System ◽  
Coiled Tubing ◽  
Underbalanced Drilling

Case Study of Underbalance Coiled Tubing Drilling to Increase Well Productivity and Ultimate Recovery in Tight Gas Reservoir Onshore Field, Abu Dhabi

2021 ◽  
Author(s):  
Abdelhak Ladmia ◽  
Martin Culen ◽  
Abdulla Bakheet Al Katheeri ◽  
Fahad Mustfa Al Hosani ◽  
Graham F. Edmonstone ◽  
...  
Keyword(s):  
United Arab Emirates ◽  
Drilling Fluid ◽  
Abu Dhabi ◽  
Christmas Tree ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Reservoir Performance ◽  
Coiled Tubing ◽  
Underbalanced Drilling ◽  
Tight Gas Reservoir

Abstract Coiled Tubing Drilling (CTD) has been growing and developed rapidly through the last two decades. There have been numerous highly successful applications of CTD technology in Alaska, Canada, Oman and the United Arab Emirates (Sharjah Sajaa and Dubai Murgham fields), among other places. Currently, Saudi Arabia has undertaken a campaign for the last seven years that has shown successful results in gas reservoirs. ADNOC initiated a trial Coiled Tubing Underbalanced Drilling (CTUBD) project in the onshore tight gas reservoirs in Abu Dhabi, United Arab Emirates beginning operations 1-December-2019. The initial trial will consist of three (3) wells. The purpose of the trial is to assess the suitability of CTUBD for drilling the reservoir sections of wells in these fields, and further application in others. The reason for choosing coiled tubing for drilling the reservoir sections is based upon the high H2S content of the reservoir fluids and the premise that HSE can be enhanced by using a closed drilling system rather than an open conventional system. The three wells will be newly drilled, cased and cemented down to top reservoir by a conventional rig. The rig will run the completion and Christmas tree before moving off and allowing the coiled tubing rig to move onto the well. The coiled tubing BOPs will be rigged up on top of the Christmas tree and a drilling BHA will be deployed through the completion to drill the reservoir lateral. The wells will be drilled underbalanced to aid reservoir performance and to allow hole cleaning with returns being taken up the coiled tubing / tubing annulus. The returns will be routed to a closed separation system with produced gas and condensate being primarily exported to the field plant via the production line, solids sparge to a closed tank or pit and the drilling fluid re-circulated. The primary drilling fluid will be treated water; however, nitrogen may be required for drilling future wells in the field and will be required regardless for purging gas from the surface equipment during operations. A flare will also be required for emergency use and for start-up of drilling. If the trial proves a success, a continuous drilling plan will be put in place.

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