Offline Cementing Technique
- Javier Urdaneta (Halliburton Services Ltd.) | I Made Adi Wiriawan (Chevron Indonesia Co.) | Gabriel Barragan (Cabinda Gulf Oil Co. Ltd) | James Curtis (Curtis Energy Consulting LLC) | Carlos Casado (Halliburton Services Ltd.) | Preston Schaefer (Halliburton Services Ltd.)
- Document ID
- Society of Petroleum Engineers
- SPE/IADC International Drilling Conference and Exhibition, 5-7 March, The Hague, The Netherlands
- Publication Date
- Document Type
- Conference Paper
- 2019. SPE/IADC Drilling Conference and Exhibition
- 3 Production and Well Operations, 1.6 Drilling Operations, 7 Management and Information, 3 Production and Well Operations, 2.2 Installation and Completion Operations, 7.2.1 Risk, Uncertainty and Risk Assessment, 7.2 Risk Management and Decision-Making, 2.1.3 Completion Equipment, 2 Well completion
- offshore operations, Zonal Isolation, Wellbore optimization, method to help reduce the cycle time, Offline Cementing
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The expansion phase of the offshore Mafumeira major capital project in Angola commenced in 2015. Because ofthe global low-oil-price environment, the team was challenged to revise the basis of design and operational procedures to help reduce well construction time by more than 50% and accelerate the date of first oil production.A major focus of this effort was to conduct as many offline activities as possible during the well construction.
Offline activities were performed before or after the jackup rig movedonto the slot, reducing the overall project cycle time. The feasibility of conducting offline cementing was evaluated and risk-assessed for several of the planned casing strings. The concept was conceived and implemented, initially for the 20-in. surface casings, for the second batch of wells in the expansion project. The ability to cement the surface casing offline allowed the rig to move to another slot and drill the next well in the batch campaign while simultaneously cementing, cutting the casing, and installing the wellhead on the previous well.
Nine tophole sections have been cemented in Angola using the offline cementing technique, providing USD 4 million intotal cost savings and reducing rig time approximately 18 hours per well, which helped achieve the overall target of reducing well construction time by 50%.The cementing objectives were successfully achieved in all cases, including adequate top of cement (TOC) and formation integrity tests (FITs) upon drilling out the shoes.
As part of continuous performance improvement, the opportunity to perform cementing offline in deeper hole sections of the well is being assessed.
|File Size||1 MB||Number of Pages||10|
Brandl, A., Valentino, V., Fauchille, G. 2014. Successful History of Cementing and Zonal Isolation in Thailand’s High Temperature Offshore Wells. Presented at the Abu Dhabi International Petroleum Exhibition and Conference, Abu Dhabi, UAE, 10-13 November. SPE-172125-MS. https://doi.org/10.2118/172125-MS.
Upchurch, E.R. and Graves, K.S. 2010. Under-Rig-Floor Openhole Logging in the Gulf of Thailand--Engineering Design of the Oil Industry’s First Simultaneous Openhole Wireline Logging and Drilling Operation. SPE Drill & Comp 25 (01): 102–112. SPE-116335-PA. https://doi.org/10.2118/116335-PA.