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Offshore Oil & Ocean Engineering


July 2015 Issue

Wellhead Monitoring Complete in Gulf of Mexico
Fugro has successfully completed a year-long wellhead monitoring project for BP Americas Inc., measuring BOP stack motions and calculating wellhead fatigue during a deployment in the Gulf of Mexico.

The drilling campaign was conducted throughout 2014 at 6,000-feet water depth and utilized the Fugro Wellhead and Riser Instrumentation Service (WARIS). This installation included transmission of motion spectra from the BOP stack and riser using standard hydroacoustic modems and the automatic processing of this data with topside environmental data to show levels of motion and fatigue and their correlation with sea states and ocean currents. This provided BP with access to real-time subsea data to aid their decision making throughout the deployment. Communications from the lower marine riser package (LMRP) and riser remained successful, even with surface wave heights greater than 3 meters at times.

The DeepData subsea motion monitoring pods, the main component in the system, were deployed to positions on the BOP stack and riser by ROV. The pods were integrated with hydroacoustic modems and had battery capacity to last for one year of deployment. A topside system was supplied that included vessel motion monitoring and links to existing environmental monitoring systems.

To ensure that the data could be accessed and utilized by BP engineers anywhere in the world, Fugro’s onshore data delivery system was used to plot and display all the processed data from the WARIS system. Summary plots were also distributed by email to a designated list of client recipients.

The success of the project indicated the technology could be deployed on other wells where fatigue capacity and potential loading is of interest.

BM-T700 Supports Bridge For Shell Malampaya Platform
Using its BM-T700 motion compensation platform, Barge Master successfully supported the installation of the permanent connection bridge for the Shell Malampaya production platform in the Philippines. A permanent bridge was set up between a newly installed depletion compression platform and an existing gas-producing, shallow-water platform in the Malampaya field.

The motion compensation platform significantly increased the reliability and predictability of this critical operation by eliminating roll, pitch and heave motions of the vessel on its load.

The BM-T700 has a payload capacity of 700 metric tons. It can accommodate a crane with an average capacity of 160 metric tons at a 12-meter radius. The platform compensates waves up to significant wave height of 2.5 meters. It consists of containerized units, which can easily be transported and assembled within 10 working days.

Barge Master was contracted by Boskalis to perform this delicate task.

Big Foot TLP Subsea Tendons Damaged
Chevron Corp. advised that the Big Foot tension-leg platform (TLP) will be moved to sheltered waters from its location in the deepwater U.S. Gulf of Mexico following damage to subsea installation tendons.

The tendons were preinstalled in preparation for connection to the Big Foot TLP, but several tendons lost buoyancy. The Big Foot TLP was not connected to any subsea wells or tendons at the time of the incident and was not damaged. There are no producing wells at Big Foot at this time. There were no injuries and there has been no release of any fluids to the environment.

Damage to the tendons, which are not connected to subsea wells and are used to attach the TLP to the seafloor, is being assessed. First production will not commence in late 2015 as originally planned.

Costain Participates in U.K. Carbon Capture Project
U.K. engineering solutions provider Costain is involved in an initiative as part of a project commissioned by the Energy Technologies Institute (ETI). The 12-month project commenced in May and is funded by the Department of Energy and Climate Change (DECC). Costain will work alongside Pale Blue Dot Energy and Axis Wells Technology to deliver a screened and appraised portfolio of offshore deep geological carbon dioxide storage sites for potential deployment in future carbon capture and storage (CCS) projects beyond the current DECC CCS commercialization program.

As part of the project, Costain will be responsible for appraising the offshore infrastructure requirements and costs, which will drive the progression of five significant offshore storage sites in order to meet their 2030 carbon dioxide injection targets. The results will inform the U.K.’s ability to permanently store decades of emissions from many of its major power stations and industrial emitters, while removing the risk surrounding the deployment of CCS technology in the future.

Kongsberg to Integrate Extensive Solutions Into Jack-Up Vessels
Kongsberg has been selected to deliver a complete electro, instrument and telecom, propulsion, safety, automation and dynamic positioning package for two new Gusto NG-2500X DP II design, offshore construction jack-up vessels. The vessels are owned by Vahana Offshore Pte. Ltd. in Singapore.

The contracts were awarded by the builder, Eversendai Offshore RMC FZE (Shipyard), in RAK Maritime City, Ras Al Khaimah, United Arab Emirates.

The Kongsberg scope of supply includes extensive engineering and integration services.

Mooring, Hull Inspection For BW Offshore FPSO
Tidewater Subsea, in affiliation with its local Nigerian joint venture company, T1 Marine, has successfully completed a mooring and hull inspections program for BW Offshore’s Sendje Berge FPSO.

The inspection included mooring chain measurements, hull cleaning and complete inspection reporting services utilizing the survey/light IMR vessel Goldblatt Tide.

Outfitted with a 3,000-meter-rated FMC Schilling Robotics WROV and 50-ton stern A-frame, the Goldblatt Tide is suitable for cost-effective deep and shallow water pre-lay and post-lay surveys, as well as a large variety of inspection, maintenance and repair scopes along the West African coast.

Oil Potential Found Offshore Guyana
Exxon Mobil Corp. announced a significant oil discovery on the Stabroek Block, located approximately 120 miles offshore Guyana.

The well was drilled by ExxonMobil affiliate Esso Exploration and Production Guyana Ltd. and encountered more than 295 feet of high-quality, oil-bearing sandstone reservoirs. It was safely drilled to 17,825 feet in 5,719 feet of water.

Stabroek Block is 6.6 million acres.

The results of this first well are encouraging, according to Stephen M. Greenlee, president of Exxon Mobil Exploration Co. “Over the coming months we will work to determine the commercial viability of the discovered resource, as well as evaluate other resource potential on the block,” he said.

CARBO Proppant Tech Solution for Gulf Operator
CARBO Ceramics Inc. has successfully applied two of its innovative proppant technologies, KRYPTOSPHERE HD and SCALEGUARD, for a major E&P operator in the Gulf of Mexico’s Lower Tertiary trend, marking the largest and deepest job for these technologies to date.

KRYPTOSPHERE HD, an ultrahigh-conductivity proppant technology for deep wells, is engineered to withstand high closure stresses and extreme cyclic loading conditions, for the life of the well. This technology provides higher production and estimated ultimate recovery (EUR), maximizing the operator’s return on investment.

SCALEGUARD is the first production enhancement technology in which scale-inhibiting chemicals are infused into a ceramic proppant. This technology provides a controlled release of the scale inhibitor, resulting in long-term protection against the formation of common oilfield scales. SCALEGUARD is designed to safeguard the entire production network—from the fracture through the wellbore to the subsea/surface processing equipment—without compromising fracture conductivity, thereby protecting the operator’s entire asset.

In this well, KRYPTOSPHERE HD was the base proppant for SCALEGUARD.

Combining KRYPTOSPHERE HD and SCALEGUARD enables the operator to maximize both conductivity and the treatment of scale.

Risk Consulting for Johan Sverdrup Project
A framework agreement awarded to Lloyd’s Register Consulting will provide risk management support to companies involved in developing the Johan Sverdrup project.

The consultancy will provide a range of services in total risk assessment and safety studies.

This latest project awarded to Lloyd’s Register Consulting represents an extension of the company’s collaboration with Aker Solutions from their initial FEED phase project.

In the detailed engineering phase, the total risk assessment study will cover dedicated HAZID workshops to identify and analyze major hazards.

It will include in-depth risk analysis relating to the field center, processing platform, living quarter platform, the drilling platform, and riser platform. The work will also oversee key areas including installation, hook-up, and commissioning among other stages of this engineering phase.


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