Deep Water

Tech Paper: Modeling Flow Profiles Using Production Log Temperature Data in Single and Multiphase Wells

Real-time multiphase flow monitoring proves valuable This paper presents the application of a method to determine a generalized wellbore-flow profile using predominantly fluid temperature data obtained through a platinum-resistance thermometer (PRT) tool. The method is advantageous, enabling the calculation of multiphase rates independently of spinner data, and it is based almost solely on temperature measurements, which are reliable and available with every production-logging string. The method...

Tech Paper: The Radial Approach to Safety Factors for Tubular Design

New radial safety factor can help assist well engineers with safer and more straightforward tubular design. Traditionally, collapse safety factor (SF) is the ratio of tubular collapse resistance to collapse load. The collapse resistance is usually calculated using formulas suggested in API 5C3 or ISO 10400. If the collapse load is very small while the tension stress and/or internal pressure are high, the collapse SF could...

Tech Paper: Fast Track Well Planning Borneo

Malaysian operator uses collaborative well planning method in their first fast track drilling operation in deepwater This paper highlights the phenomenal achievement of a Malaysian operator’s first fast track drilling operation in a deepwater well offshore Borneo. The collaborative well planning (CWP) method fundamental to the drilling success is discussed. The discussed drilling environment is an overpressured deepwater area that has not only forced the earlier...

Case Study: GeoBalance® Service Helps Operator Save Big in Challenging Deepwater Environment

Automated managed pressure drilling system successfully drills ‘undrillable’ wells in 2,000 meters of water CHALLENGE – The operator elected to use managed pressure drilling to overcome these challenges. This project would also be the world’s first implementation of a MPD surface control system onto a MPD ready drill ship. The safe and successful implementation of Halliburton’s GeoBalance® MPD technology required an engineered approach working closely with...

Tech Paper: Field Application of an Innovative, Minimally Damaging Low-ECD Invert Emulsion Fluid for Drilling and Completion of HP/HT Wells: Update on Fluid Performance

Invert emulsion fluid helps operator save time and money while drilling on an HP/HT field Previous publication SPE-174176-MS discussed the development of a novel high-pressure/high-temperature (HP/HT) organophilic clay-free (OCF) invert emulsion fluid (IEF) for first use as a combined reservoir drilling fluid (RDF) and screen running fluid (SRF) for stand-alone screen (SAS) completions. The current paper details the continued application of this innovative fluid in a...

Case Study: Use of Remotely Operated Technology Saves 45 Hours Rig Time

Remotely operated barrier valve and bridge plug increase operational efficiency while eliminating a number of intervention runs CHALLENGE – Chevron wanted to hydraulically set a production packer and provide dual well barriers with minimal intervention methods. The completion design had a limitation where only low pressure could be applied against the fluid loss device, hence the requirement for a separate packer-setting solution. The typical completion method...

Tech Paper: Size Degradation Studies of Lost Circulation Materials in a Flow Loop

When drilling problem zones in mature fields, it is important to use resilient lost circulation materials Recently, there has been significant interest in understanding the material properties of lost circulation materials (LCM), including size degradation studies from mechanical compression tests and from shear flow. These types of tests are currently of particular importance because of increased drilling activity in mature fields, which often require LCMs as a...

Tech Paper: Remotely Operated Barrier Valve Provides Interventionless Solution for Offshore Vietnam Completion Campaign

Operator adopts completion installation practice that helps reduce risk and save rig time Considering the scope of work necessary to batch-complete six wells within a tight deadline, the initial outline for an offshore Vietnam completion program required multiple slickline well interventions, not only while on the rig critical path but also during simultaneous operations (SIMOPS). This high frequency of well intervention added considerable time, cost, and potential...

Tech Paper: Design Procedure for Cementing Intercalated Salt Zones

Tailoring the right cement design to maintain well integrity across salt zones Wells often require being drilled through and cemented across salt formations. In many parts of the world, salt sections consist of multiple salt types. These include Halite, Carnallite and Tachyhydrite. The last two salt types could move one hundred times faster than Halite and are chemically reactive. Typically, Carnallite and Tachyhydrite occur as streaks...

Tech Paper – Behind Pipe Log Evaluation Study: Deepwater Subsea Abandonments in the Gulf of Mexico

Pipe evaluation techniques can help reduce the cost of removing casing strings during plug and abandonment activities New techniques for well abandonment log evaluations have been under study since 2012 in the Gulf of Mexico (GOM). Legacy practices typically used acoustic methods consisting of cement bond log and ultrasonic scanner devices. The new methods described in this paper consist of adding nuclear sensors to supplement the...

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