First MLTBS Level 5 Installation for Operator in Abu Dhabi

Elsayed, Mohamed; Abdulhalim, Abdallah; Al-Mutairi, Ali Mohamed; Saqib, Talha; Sabri, Abdul Moez; Karrani, Saud Mohamed; Ponton, Calvin B.; Rosas, Eulalio; ElSin, Rami Samir

doi:10.2118/182986-ms

Day 1 Mon, November 07, 2016 2016

DOI: 10.2118/182986-ms

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First MLTBS Level 5 Installation for Operator in Abu Dhabi

Mohamed Elsayed¹,

Abdallah Abdulhalim²,

Ali Mohamed Al-Mutairi³

et al.

Abstract: A major Abu Dhabi oil and gas producer targeted an increase in production from their major offshore oilfields. Better optimization of the reservoir through advanced well architecture was considered an option. One way to achieve this objective was through accessibility and hydraulic control of all horizontal drains. Multilateral technology is commonly used to increase the production per well and reduce drilling time while optimizing production facilities. The project targeted multiple reservoirs with two separa… Show more

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Cited by 4 publications

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Enhancing Reservoir Management by the Successful Drilling and Installation of a Dual Lateral Completion

Al-Shamsi

Hernandez

Zidan

et al. 2020

Day 1 Mon, November 09, 2020

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The challenges of high heterogeneous multi-layer reservoirs were a driver for ADNOC to establish new well completion requirements. Based on this, the well completion strategy was revised in order to improve the completion design for a Dual Oil Producer (DOP) initially well planned without accessibility into the upper drain. The solution was successfully implemented by drilling the well having a Multilateral Dual String Level 5 Completion System to have full reservoir isolation and mechanical accessibility to TD in both drains. A major approach was implemented giving the utmost importance to all operational risks concerning drilling and completion. The design relies on the Latch Coupling (LC) pre-installed with the production casing as the foundation for the successful drilling and cementing the upper drain liner and for different completion runs. Thus, a level 5 multi-lateral completion coupled with Inflow Control Devices and Pre-perforated Liner in the upper and lower lateral respectively was successfully deployed. The main advantages of this technology compared to the initial proposal are: Brings effectively two single wells from one slot of the wellhead tower as it provides independent access & control for enhanced reservoir management (well stimulation, production logging and water shut-off). Substantial cost savings due to the utilization of one slot only. Conventional single designs need two slots to deliver equivalent completion requirements. The completion technology meets the Well Integrity Policy & Completion Guidelines stated by ADNOC to have full accessibility to all drains. This is the first Level 5 configuration installed in UAE integrated with a lower completion. The design enhances the benefits of the multilateral construction by providing full mechanical & pressure isolation at the junction throughout the life of the well. Furthermore, accessibility to both laterals from surface without the use of a re-entry deflector or any constraints was deemed to be paramount for a successful well construction.

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Enhancing Reservoir Management by the Successful Drilling and Installation of a Dual Lateral Completion

Al-Shamsi

Hernandez

Zidan

et al. 2020

Day 1 Mon, November 09, 2020

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Multilateral Challenges and Solutions for Installations in the Middle East

Kelsey

Fanchin

Rondon

2020

Day 1 Mon, November 09, 2020

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Multilateral technology can provide a higher recovery factor by achieving a longer field life supported by the cumulative production of the multiple laterals, turning otherwise unviable reservoirs into economically sound targets, keeping construction costs down and minimizing risk. This paper will focus on TAML 5 systems that meet well integrity requirements by isolating the junction from reservoir pressure or stimulations and provide independent accessibility on both laterals during the life of the well. This capability eliminates the requirement to pull the completion should access be required to the lateral for cleaning, stimulation, zonal isolation, or data acquisition. Using this technology also leads to a reduction in the cost of well construction as well as intervention. This paper discusses challenges faced to provide accessibility to both laterals from surface without using a re-entry deflector as well as solutions including segregated and commingled flow installations. Discussion will also cover completion designs that tie new laterals into existing production casing. Case studies will include a discussion of workover operations, isolation methods, and lateral creation systems. In the Middle East, older TAML 4 wells have been converted to TAML 5 in order to prevent detected gas migrating into the mainbore at the junction. This conversion of a cemented junction well has enabled production to resume on the wells. This application has also been applied to the installation of new wells in the region. New and re-entry wells were completed with intelligent upper completions to enable flow control of each lateral. The paper focuses on the challenges, solutions, and successful case studies of multilateral wells constructed in the Middle East. The paper also provides insight as to methodology for continually improving reliability of multilateral installations to maximize efficiencies.

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Recent Case Histories of Multilateral Systems Enabling Thru Tubing Intervention in the Middle East

Butler

Kelsey

Racine

2021

Day 4 Thu, November 18, 2021

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Historically, the ability to perform intervention on multilateral wells has been limited. While multilateral (ML) well construction technologies have progressed to a high level of reliability, multilateral systems that enabled intervention during the life of well had a more limited track record. Intervention outcomes after prolonged periods of production were less consistent. This lack of technologies with sufficient intervention case histories meant that generally multilateral well architecture was not selected in applications where thru tubing intervention was a requirement. In recent years, multilateral well architecture has continued to increase in demand, with more ML wells drilled and completed in the last five years than any other five-year period in the technology's history. With this increased demand has come industry enthusiasm to further mature its intervention capabilities. This paper will review two recent case histories of separate multilateral well completion systems that enable intervention. This opens up new potential for the industry to take advantage of the cost reductions achieved with multilaterals in a much larger scope of well applications. Two separate completion systems will be covered in this paper, System A installed in a cemented multilateral junction and system B, a completion that creates a hydraulically isolated junction via either a dual string completion or a single string completion that splits into two strings. These case histories were exectuted in 2017 to 2019, and interventions were performed after one to two years of production. Detailed in each case study will be an overview of the equipment, the operational sequence, intervention outcome, and any lessons learned or improvements. The systems have demonstrated themselves as a reliable method to access laterals in non-ideal downhole environments where debris is present after the well has been on production. The tubing sizes for the case studies are 3-1/2" and 4-1/2". In each of these wells, the following operations have been successfully performed: drift testing, acid stimulation through coil tubing and breaking of a ceramic disc. Both slickline and coil tubing have been used for the interventions and in some cases with tractors. Junction inclinations range from 1 to 43 degrees. Plans for ongoing installations for the systems are being executed in the Middle East Region. Further, expansion of the system A capabilities by integrating it with other existing technologies is also planned. This will enable projects such as the installation of a trilateral well with flow control and intervention for each individual leg, and also the conversion of existing single bore wells to multilateral with intervention capability.

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First MLTBS Level 5 Installation for Operator in Abu Dhabi

Cited by 4 publications

References 1 publication

Enhancing Reservoir Management by the Successful Drilling and Installation of a Dual Lateral Completion

Enhancing Reservoir Management by the Successful Drilling and Installation of a Dual Lateral Completion

Multilateral Challenges and Solutions for Installations in the Middle East

Recent Case Histories of Multilateral Systems Enabling Thru Tubing Intervention in the Middle East

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