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A study using a dynamic multiphase-flow software simulated a rapid-unloading event and determined the gas fraction in the riser annulus and the effect on riser fluid levels. The Troll field is one of the largest gas producers discovered off Norway, but ensuring its long-term future required finding ways to drill wells in an increasingly fragile formation to develop its rich oil reserves. The list of wells drilled using dual gradient includes one drilled in the “eastern Gulf of Mexico,” which could be more precisely described as offshore Cuba. A previous attempt to drill an exploration well in ultradeep water in the Gulf of Mexico (GOM) did not reach its objective.
This paper presents a case study that is an example of how reassessing a flow-assurance risk-management strategy for operating assets can identify opportunities for optimization. Banyu Urip crude contains 26% wax, which can lead to flow-assurance challenges in a crude pipeline exposed to lower temperatures. Injection of pour-point-depressant (PPD) chemicals has been considered an effective method to ensure flow of moderate waxy crude. Current logistics and pipeline-infrastructure limitations make transportation and production of waxy crude oil challenging, necessitating a step change in the chemistry required to mitigate crude-oil-composition issues. In this study, the effects of the hydrodynamic parameters are decoupled with specially designed flow-loop experiments.
A case study in the deepwater Gulf of Mexico in which pressure transient analysis, fractional flow, and production logging tools were integrated to identify correctly the cause of, and execute an effective remedy for, a well’s productivity deterioration. As part of an effort to evaluate existing riser systems, an operator launched an inspection and testing program to investigate risers retrieved following well abandonment after a service life of nearly 10 years in the Gulf of Mexico. The largest lease sale in the history of the area attracts $139 million in total bids, a $2 million increase over the previous lease sale held last August. Integrated surveillance is critical for understanding reservoir dynamics and improving field management. A key component of the surveillance is areal monitoring of subsurface changes by use of time-lapse geophysical surveys such as 4D seismic.
This paper describes a material designed to interact specifically with highly corroded and weathered pipe to enable in-place application and refurbishment. As part of an effort to evaluate existing riser systems, an operator launched an inspection and testing program to investigate risers retrieved following well abandonment after a service life of nearly 10 years in the Gulf of Mexico. This paper describes a novel method of chemical dosage based on time-resolved fluorescence (TRF) that allows a simple, accurate, and efficient quantification of chemicals below parts-per-million ranges, even for double (scale/scale, scale/corrosion) quantification.
US Court decisions put two major pipelines on hold and led to the cancellation of another pipeline project within days of each other. The Búzios-5 production system is planned to include the interconnection of 15 wells to a floating production, storage, and offloading vessel in two phases. CB&I Storage Solutions joins a list of contractors working on the Trans Mountain Expansion Project. The deal follows BP’s divestment of its global petrochemicals business in late June. Designed to be a “living” map, it focuses on the largest fixed infrastructure for crude oil and refined products such as trunk pipelines, refineries, and storage facilities.
Approved in October, the Flow Measurement Technical Section will help engage the greater SPE technical community in flow-measurement-related issues and technologies. It will cover the full spectrum of flow measurement, including single-phase and multiphase flow. At a water treatment plant for an onshore oil field in northern Germany, formaldehyde injection was started in 2015 as a biocide. The goal of this study was to understand the chemical parameters and microbial distribution in the water system and whether formaldehyde injection was effective. To facilitate testing and comparison of products that attenuate microbially influenced corrosion under field conditions, a method using microorganisms from a low-tide, anoxic North Sea sample was developed that allows corrosion measurements to be made for corroding biofilms grown on steel surfaces.
Penspen will also carry out engineering services on the Zirku Island plant. Wood is Shell’s exclusive partner for Shell’s Smart Choke technology, which suppresses riser-induced slugging. A small core team with the ability to make decisions was responsible for getting a subsea tie-back project up to sanction within a short-time frame. SPE’s technical sections offer communities rich with industry expertise. And your engagement adds to the wealth of knowledge to be shared.
The inspection projects to assess water ingress will be done via remotely operated vehicle. If we must reduce emissions to make our industry “greener,” what are some of the options that we can apply? Designed to be a “living” map, it focuses on the largest fixed infrastructure for crude oil and refined products such as trunk pipelines, refineries, and storage facilities. The contract continues the two companies’ 8-year working relationship; in 2012, they performed the world’s-first underdeck inspection. Five key steps for shaping renewable energy projects are discussed. A recent test proved the feasibility of using LiDAR on remote-controlled drones to create 3D maps of the inside of tanks, increasing the safety and efficiency of inspections.
Two intelligence groups share similar views on how the fallout from the COVID-19 pandemic has impacted OFS companies’ valuations and operations. What are the impacts of the energy crunch on OCTG demand? Ardyne’s North Sea long-term contracts were for 175 wells with possibly more to follow, while Allseas contract is for removal and disposal for the Valhall complex. The data-driven maintenance program incorporates riser condition, usage, and fatigue analysis with a risk-based inspection process. InterMoor will support Neodrill with project execution, installation services, and business development of its conductor anchor node technology.
McDermott’s completion comes 19 months after it was first awarded. SapuraOMV achieved first production from the Larak gas field in January. Material selection is a first line of defense against corrosion. This article reviews how to recognize pitting and crevice corrosion, as well as how to optimize tubing material selections for marine oil and gas applications based on the material’s PREN value. The methodology is the industry’s first to address CUI.