Mature-Field Rejuvenation of a Tight Gas Carbonate Reservoir Utilizing Coiled-Tubing Underbalanced-Drilling Techniques

2008 ◽  
Author(s):  
Clayton G. Mykytiw ◽  
David Robert Killip ◽  
Robert Lee William Brewin ◽  
John Capps
Keyword(s):  
Carbonate Reservoir ◽  
Tight Gas ◽  
Coiled Tubing ◽  
Underbalanced Drilling ◽  
Mature Field

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.

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.

scholarly journals Development of machine learning predictive models for history matching tight gas carbonate reservoir production profiles

2018 ◽  
Vol 15 (5) ◽  
pp. 2235-2251 ◽  
Author(s):  
Eric Thompson Brantson ◽  
Binshan Ju ◽  
Busayo Oreoluwa Omisore ◽  
Dan Wu ◽  
Aphu Elvis Selase ◽  
...  
Keyword(s):  
Machine Learning ◽  
Predictive Models ◽  
History Matching ◽  
Carbonate Reservoir ◽  
Tight Gas

Extending Well Productive Life with Acid Re-fracturing in a High Pressure/High Temperature Tight Gas/Condensate Carbonate Reservoir

2011 ◽  
Author(s):  
Mir Md. Rezaul Kabir ◽  
Qasem M. Dashti ◽  
Jai Ram Singh ◽  
San Prasad Pradhan ◽  
Ikhsan Nugraha ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Carbonate Reservoir ◽  
Gas Condensate ◽  
Tight Gas ◽  
Productive Life ◽  
High Pressure High Temperature

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

Underbalanced Drilling and Completion of Sand Prone Tight Gas Reservoirs in Southern North Sea

2007 ◽  
Author(s):  
Cornelis A.M. Veeken ◽  
Hans van Velzen ◽  
Jilles van den Beukel ◽  
Hon Meng Lee ◽  
Richard Hakvoort ◽  
...  
Keyword(s):  
North Sea ◽  
Tight Gas ◽  
Gas Reservoirs ◽  
Tight Gas Reservoirs ◽  
Southern North Sea ◽  
Underbalanced Drilling
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