Ursa Ursa
PRODUCTION FACILITY
Facility Name Ursa TLP Duty Oil/Gas
Operator Shell Current Status Producing since 1999
Host Type TLP Water Depth 1,222 m / 4,033 ft
Dev.Cost $1,450,000,000 Region US
 
Location Mississippi Canyon 810
 
OIL & GAS FIELD
Field Name Crosby Discovery Date Dec 1999
Block Mississippi Canyon 898 Reserve Type Oil/Gas
Current
Status
Producing Production Start Dec 2001
Water Depth 1,234 m / 4,072 ft



Field Name Ursa Discovery Date Jan 1991
Block Mississippi Canyon 808, 809, 810, 852, 853, 854 Reserve Type Oil/Gas
Current
Status
Producing Production Start Apr 1999
Water Depth 1,218 m / 4,019 ft



Field Name Princess Discovery Date May 2000
Block Mississippi Canyon 765, 766 Reserve Type Oil/Gas
Current
Status
Producing Production Start Nov 2002
Water Depth 1,113 m / 3,673 ft
 
 
Description
 
The Greater Ursa Area consists of three fields, Ursa, Crosby and Princess, tied-back to a major production hub, the Ursa TLP. Situated in the Gulf of Mexico, the first field to commence production from the Ursa TLP was the Ursa field.

Ursa

The Ursa field, located 130 miles southeast of New Orleans on Mississippi Canyon Blocks 808, 809, 810, 852, 853 and 844, is in 4,000 feet (1,219 meters) of water. Shell, the operator, holds a 45% interest in Ursa; BP has a 23% interest, and Conoco and Exxon each hold 16% in the project.

The well was drilled in 1991 by Discoverer Seven Seas drillship.

Extending the life of the well, the field was injected with water in July 2008 and is planned to continue producing for the next 30 years. With a listed volume enhancement capacity of 30-thousand barrels of oil equivalent per day, the water flood is expected to extend the life of the field for 30 years. The Ursa water flood is one of the largest construction projects in the Gulf of Mexico. Technip was awarded this project, and it consists of four subsea water injection wells tying back to the Ursa platform.

Crosby

Situated on Mississippi Canyon Block 898 and 899 in the Gulf of Mexico about 160 miles (257 kilometers) southeast of New Orleans is the Crosby field.

BP used the Ocean America drilling rig to produce from the discovery well, located in 4,400 feet (1,341 meters) of water, in 1997. An appraisal well was drilled in 2000. The target reserves are primarily oil, at depths of 17,000 to 18,000 feet (5,182 to 5,486 meters) below sea level, in three separate reservoirs.

Using a dual flow line system, Crosby's production is carried from a six-slot manifold to Shell's Ursa tension leg platform.

Production from Crosby's first well began in December 2001. Currently, all three wells are online and producing 20,000 barrels of oil per day. Peak production is expected to be 60,000 bpd and 90 MMcf/d.

Shell operates and has a 50% interest in the project; BP has the remaining 50%.

Princess

The Princess field is located in Mississippi Canyon Blocks 765 and 766 in the Gulf of Mexico, about 140 miles (225 kilometers) southeast of New Orleans in 3,650 feet (1,113 meters) of water. The Noble Jim Thompson drilled the well in May 2000.

The first producing well at Princess was spudded in 2002 the Noble Jim Thompson rig. It was drilled to a depth of 27,122 feet. Shell spudded Princess' first subsea development well, the Eastern Appraisal well, January 2002. The well was drilled to a depth of 33,200 feet, which set a new record for measured depth.

The initial phase of development included drilling two additional subsea wells - Northern and Central wells. The wells were completed in 2003 by Noble Paul Romano rig.

In May 2009, Technip received a contract from Shell to engineer, fabricate and install a flowline and pre-and-post lay surveys. The gas lift flowline is part of the Princess development which ties-back to the Ursa TLP.

The field started producing in 2003.

Ursa TLP

In 1996, Shell developed Ursa utilizing a large tension leg platform. It was installed on Mississippi Canyon Block 809 in approximately 3,800 feet (1,158 meters) of water.

Ursa fabrication began in July 1996. The TLP weighs 97,500 tons and the total steel weight is 63,300 tons. Ursa is 4,285 feet (1306 meters) high from seafloor to the crown block of the drilling rig.

The hull is compromised of four circular steel columns that are 85 feet in diameter, 177 feet high and a ring pontoon that is 38 feet wide and 29 feet high. The hull weighs 28,600 tons. Belleli Offshore built the hull.

The deck consists of six modules: wellbay, quarters, power, drilling and two processes. The deck modules are an open truss frame design, 300 feet by 300 feet by 50 feet high (91 meters by 91 meters by 15 meters high) with a total steel weight of 12,500 tons. Total topside weight is 22,400 tons. J. Ray McDermott built the modules.

Production capacities for the TLP are 150,000 bpd and 400 Mmcf/d of gas from 14 wells; the TLP was installed in 1997. At the time of production start-up, Shell claimed a world water-depth record for a permanent drilling and production platform.

An 18-inch diameter oil pipeline and a 20-inch diameter natural gas pipeline transports production to the West Delta 143 platform. Both pipelines were installed as part of the Ursa development.
 
Activities
 
Noble Jim Thompson to Drill Development Well at Princess Field
Date: Aug. 2009
Type: Status Update
The Noble Jim Thompson semisub is slated to drill a development well at the Princess field. The Princess field began production in 2002 via the Ursa TLP on Mississippi Canyon block 810. Shell operates this prospect with a 45% interest. Other partners include BP (23%), ExxonMobil (16%), Conoco (16%).
Technip Wins Subsea Flowline Gig at Princess Field in GOM
Date: May. 2009
Type: Contract Award
Technip was awarded a contract by Shell for the Princess field, located on Mississippi Canyon Blocks 765 and 766 in the Gulf of Mexico. The contract covers the project management, engineering, fabrication and installation of a flowline and pre-and-post lay surveys. The gas lift flowline is part of the Princess development which ties-back to the Ursa TLP. The TLP is located on Block MC 809 in a water depth of 1,160 meters (3,800 feet). The Princess field commenced production in 2003.
Noble Jim Thompson Spuds Well at Ursa
Date: Jan. 2009
Type: Status Update
The Noble Jim Thompson spudded a well at Ursa located on Mississippi Canyon 809 well #P007 (BH - MC808). Drilling operations are expected to last 90-days.
New Ultra High Pressure Pumps Help Increase Shell's Ursa/Princess Oil Field Capacity
Date: Dec. 2008
Type: Development Activity
Flowserve Corporation announced the successful start up of what is believed to be the highest pressure deep water injection centrifugal pumps in operation worldwide. At Shell's Ursa/Princess Waterflood project, the pumps will inject high pressure water into the sea bottom field to force out otherwise unrecoverable oil. The project is expected to extend the life of the applicable Gulf of Mexico field by 10 years.
Shell Expects Ursa Back Online by End of Next Week
Date: Sep. 2008
Type: Status Update
Shell says that the company has accelerated scheduled maintenance on the Ursa facility and expect it to be back online by the end of next week. The Ursa TLP is located on Mississippi Canyon 809 in water depths of over 1200 meters and serves as host facility to the Ursa, Crosby & Princess fields.
Shell, Grenland Implement Minox Deoxygenation System in GOM
Date: Jul. 2008
Type: Status Update
An improved Minox system from Grenland Group is now effectively removing oxygen from the injection water of Shell’s Ursa platform in the Gulf of Mexico. The oxygen is removed in order to reduce corrosion in equipment and pipe systems, and to prevent growth of unwanted bacteria in the oil reservoirs. The technology from Grenland Group is drawing attention worldwide.
Shell Injecting New Life into Ursa & Princess Fields
Date: Jul. 2008
Type: Status Update
Shell announced today that it has achieved yet another milestone in the Ursa/Princess Waterflood project. First injection of water occurred on July 3, 2008, and is planned to continue for the next 30 years. With a listed volume enhancement capacity of 30-thousand barrels of oil equivalent per day, the waterflood is expected to extend the life of the field by 10 years.
Shell Brings Two Gulf of Mexico Fields Onstream
Date: Jan. 2002
Type: Production Start
The first subsea tieback to Ursa, the 3-well Crosby development, is located in Mississippi Canyon Blocks 898 and 899 in the Gulf of Mexico. Production from Crosby's first well began on Dec. 17, 2001. Currently, all three wells are online and producing 20,000 barrels of oil per day. Peak production for Crosby is expected to be approximately 60,000 barrels of oil per day and 90 million cubic feet of gas per day by the end of the first quarter of 2002.
 
Status History
 
Princess

Producing - 2002 to -
Under Development - Jan 2002 to Oct 2002
Discovery (Appraised) - Oct 2000 to Dec 2001
Appraisal Drilling - Jun 2000 to Oct 2000
Three sidetrack were drilled immediately after the discovery well.
Exploratory Drilling - Apr 2000 to May 2000
Discovery made on MC 765 using Noble's Jim Thompson.
Crosby

Producing - Dec 2001 to -
Production began in December 2001.
Appraisal Drilling - 2000 to 2001
An appraisal well was drilled in 2000.
Exploratory Drilling - 1997 to 1999
The discovery well, MC 899 no.5, was drilled in 1997 by BP using the Ocean America drilling rig. A sidetrack was immediately drilled from the discovery well to delineate the discovered reservoirs.
Ursa TLP

Producing - Apr 1999 to -
Under Construction - Jul 1996 to Apr 1999
Shell announced in July 1996 the partners' plans to develop Ursa utilizing a large tension leg platform to be installed on Block 809 in approximately 3,800 feet of water.
Ursa

Producing - Apr 1999 to -
Under Development - Jul 1996 to Apr 1999
Discovery (Drilled) - 1991 to 1996
 
Project Map N. America - US GOM
Line Separator
Project Image
Ursa TLP
 
Ursa TLP Ready for Towout
 
Ursa TLP Hull
 
Ursa and Princess Fields
 
Ursa Field
 
Ursa
 
Ursa TLP