TOPICS OF INTEREST
Design and Surveillance Tools Help Lower Integrity Risks for High-Temperature Wells
Risk Assessment of Fluid Migration Into Freshwater Aquifers in Colorado Basins
Wellbore-construction methods, especially casing-and-cementing practices for the protection of freshwater aquifers, have been reviewed in the Piceance, Raton, and San Juan Basins in Colorado.
System Adds Reliability, Efficiency to Attaching Well Construction and Completion Tools
A new attachment system overcomes the limitations of traditional methods for securing tools and accessories to drilling and completion strings.
Improving Casing Integrity by Induction Brazing of Casing Connections
Brazing technology allows metallurgical joining of dissimilar materials by use of a filler material.
Investigating the Benefits of Rotating-Liner Cementing and Impact Factors
This paper discusses an expandable-liner-hanger (ELH) system that provides liner rotation during the liner deployment and the cementing operation while providing a hydraulically energized liner-top seal upon setting.
Real-Time Monitoring of Piezoresistive Smart Cement To Verify Operations
A field well was designed, built, and used to demonstrate the concept of real-time monitoring of the flow of drilling mud and smart cement and the hardening of the cement in place.
Despite cement’s remarkable properties, the search continues for enhancements in the areas of cost and isolation performance. Efficiencies and enhancements have been explored even to the point of replacing cement with other materials.
Deepwater Tieback-Cementing-Design Challenges and Engineering Approach
This paper focuses on cementing-design challenges and discusses the engineering techniques used to approach them.
Drilling Improvements Work Toward the Perfect Well in the Eagle Ford
In the Eagle Ford, an integrated approach to engineering and operations was key to optimize performance and improve understanding of the area.
Solving the Casing-Wear Puzzle Using Stiff-String Model
Precise casing-wear prediction is important for improving well integrity and longevity, while simultaneously making casing designs more cost-effective. There are no industry guidelines for casing-wear prediction. This article presents a validated predictive model.
Cementing is central to the discussion of zonal isolation and well integrity.
New Approach Tests Cement-Sheath Integrity During Thermal Cycling
Operators in the North Sea have been concerned about the ability of the cement sheath to maintain sealing integrity because of the increasing number of reported failures in mature wells. This paper presents results from a new laboratory setup to visualize the source of issues.
An Integrated Approach to Solving Sustained Casing Pressure in the Cana-Woodford Shale
Many wells in the Cana-Woodford shale suffer from chronic sustained casing pressure (SCP) because of poor cement-sheath bonding.
Design Procedure for Cementing Intercalated Salt Zones
This work demonstrates cement design that includes evaluating cement-sheath mechanical integrity in intercalated salts.
The Wide Divide Between Fracturing Plans and Reality
What is observed when an unconventional well is fractured is often at odds with what was expected by those who planned the job.
Tandem Downhole-Isolation-Valve System Eliminates Snubbing
The operator of an offshore jackup rig in the North Sea required safe and efficient deployment of the completion string without killing the well during tripping.
Managed-Pressure-Drilling Technology Delivers Challenging HP/HT Drilling Campaign
The Shearwater field is a deep, high-pressure/high-temperature (HP/HT) reservoir located in the UK Central Graben of the North Sea.
Increasing Cement-Sheath Integrity To Reduce Gas Migration in the Marcellus Shale Play
This study examines the effects of drilling, completion, and production operations and their associated cyclic stresses on a cement sheath.
Deepwater Gas-Zone Shutoffs With Wireline in Openhole-Gravel-Pack Completions
An operator successfully executed two wireline through-tubing gas-shutoff (GSO) workovers in high-angle openhole-gravel-pack (OHGP) completions to isolate high-gas/oil-ratio (HGOR) zones, resulting in significantly increased oil production.
Use of Biodegradable Materials During Refracturing of a Horizontal Well
One approach to refracturing involves the use of mechanical diverters such as perforation balls and rock salts, which may be useful for one stage; however, cessation of pumping operations results in these diverters falling out of the perforations or dissolving.
Offshore Industry Gets a Fresh Look at Foamed Cement
An ongoing research project started nearly 3 years ago by the US Department of Energy’s National Energy Technology Laboratory (NETL) is shedding new light on what really happens to foamed cement as it is pumped deep down offshore wells during completions.
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16 April 2018