Page 19 - OGA-Sept-2015
P. 19
THIS MONTH
OIL & GAS AUSTRALIA
Production starts at Yolla 6
PRODUCTION has started from the Yolla Operations underway at the Yolla platform. Image courtesy AWE.
6 development well in the Origin Energy-
operated BassGas project, a partner in the nearby resources and discoveries. million barrels.
project has announced. The news came after Origin Energy AWE holds a 35 per cent stake in the T
Production from the well had been downgraded potential reserves at the project, L1 permit, while Origin Energy holds 42.5%
successfully tied-in to export facilities on the with AWE writing down its stake by 5.5 and Toyotu Tsusho Gas and Prize Petroleum
Yolla platform, bringing the early, unstabilised million barrels, to bring it to a total of 13 International each hold 11.25%. l
production rate from the facilities up to about
57 terajoules per day.
Origin is monitoring well performance to
achieve optimal co-mingling with production
from the existing Yolla 4 well, AWE said.
AWE managing director Bruce Clement,
said that the development drilling phase of the
BassGas Mid Life Enhancement (MLE) project
was nearing completion.
“The next phase of the project will see the
hook up of the gas compression and condensate
pumping modules over the coming 18 months,”
he said.
The BassGas project consists of the Yolla
offshore well head platform connected by
pipeline to the gas processing facility at Lang
Lang, Victoria.
The MLE, which commenced in 2011, is
expected to support increased longer term
production from the Yolla field and provide
the opportunity for the future development of
Rig weight monitor developed in selecting Yolla rig
BY RICHARD PALMER, DNV GL damage during installation was high. This As such, the operations planning team were
REGIONAL MANAGER AUSTRALIA. could have led to operational restrictions and able to successfully assess the safe operational
downtime during drilling operations and limits at any stage and in preparation of any
SPECIALISTS from DNV GL’s Noble Denton potentially add significant costs to the project. weather occurrence.
marine assurance and advisory service
have created a new rig-weight monitoring DNV GL experts from Perth, Brisbane, The new tool not only helped in the
tool while working to support further Singapore and London were asked to further understanding of the project’s operational
development of Origin Energy’s Yolla field. support the operator and the JV partners in limits, but was also instrumental in obtaining
providing extensive and detailed analysis to wider stakeholder buy-in to the project.
The company aimed to meet and overcome determine the criticality of all the operational
the technical and environmental challenges in weight limitations and to determine the range This enabled the operator to make an
the selection of a jack-up rig for the Yolla gas of allowable loading conditions during storm informed decision to select the three-leg
field off the south coast of Victoria. events of varying severity. SeaDrill jack-up rig “West Telesto” for
installation alongside the Yolla A platform.
The company’s team of jack-up and This allowed the operator to optimise the
geotechnical specialists have been working intended drilling program while staying within The findings also helped reassure all parties
with Origin Energy, operator of the BassGas the safety requirements of the project. of the parameters for installation.
Joint Venture (JV), since 2011 to identify the
optimal jack-up rig to install alongside the It also enabled the project team to assess The comprehensive review of operational
already-operational Yolla A platform in the what critical path activities and times scales capability and allowable loading conditions
Bass Strait. would be needed to recover the rig to a safe contributed to the safety case that the operator
operational weight, and hence, create a decision submitted to the Australian offshore safety
To do this, DNV GL’s team of specialists had flow chart that would guide operations. authority, NOPSEMA.
to consider many site-specific challenges.
This would minimise the risk of downtime Facing the onset of a deteriorating season,
These included evaluating the area’s complex due to adverse weather conditions, keeping the and after a short spell waiting on more
soil conditions, which were at risk of significant project on schedule and within budget. favourable weather conditions, the West
degradation during pre- and environmental Telesto was successfully installed alongside the
loading, as well as the implications of the site’s To resolve these issues, a graphical tool was Yolla A Platform in January 2015.
location in the Bass Strait – an area of frequent developed that represented the limits of the rig
and often severe storms. in operating and extreme environments. DNV GL’s Singapore office provided marine
warranty approval for the project, and a
The site’s environmental conditions were This novel graphical representation allows geotechnical specialist from the London office
such that the risk of platform contact and direct comparison with the information was on board to assist with decision-making
contained onboard with the rig-weight and verification of the analysis by monitoring
monitoring system. the real-time installation response. l
CELEBRATING 34 YEARS OF PUBLISHING IN AUSTRALIA ENERGY PUBLICATIONS 17
OIL & GAS AUSTRALIA
Production starts at Yolla 6
PRODUCTION has started from the Yolla Operations underway at the Yolla platform. Image courtesy AWE.
6 development well in the Origin Energy-
operated BassGas project, a partner in the nearby resources and discoveries. million barrels.
project has announced. The news came after Origin Energy AWE holds a 35 per cent stake in the T
Production from the well had been downgraded potential reserves at the project, L1 permit, while Origin Energy holds 42.5%
successfully tied-in to export facilities on the with AWE writing down its stake by 5.5 and Toyotu Tsusho Gas and Prize Petroleum
Yolla platform, bringing the early, unstabilised million barrels, to bring it to a total of 13 International each hold 11.25%. l
production rate from the facilities up to about
57 terajoules per day.
Origin is monitoring well performance to
achieve optimal co-mingling with production
from the existing Yolla 4 well, AWE said.
AWE managing director Bruce Clement,
said that the development drilling phase of the
BassGas Mid Life Enhancement (MLE) project
was nearing completion.
“The next phase of the project will see the
hook up of the gas compression and condensate
pumping modules over the coming 18 months,”
he said.
The BassGas project consists of the Yolla
offshore well head platform connected by
pipeline to the gas processing facility at Lang
Lang, Victoria.
The MLE, which commenced in 2011, is
expected to support increased longer term
production from the Yolla field and provide
the opportunity for the future development of
Rig weight monitor developed in selecting Yolla rig
BY RICHARD PALMER, DNV GL damage during installation was high. This As such, the operations planning team were
REGIONAL MANAGER AUSTRALIA. could have led to operational restrictions and able to successfully assess the safe operational
downtime during drilling operations and limits at any stage and in preparation of any
SPECIALISTS from DNV GL’s Noble Denton potentially add significant costs to the project. weather occurrence.
marine assurance and advisory service
have created a new rig-weight monitoring DNV GL experts from Perth, Brisbane, The new tool not only helped in the
tool while working to support further Singapore and London were asked to further understanding of the project’s operational
development of Origin Energy’s Yolla field. support the operator and the JV partners in limits, but was also instrumental in obtaining
providing extensive and detailed analysis to wider stakeholder buy-in to the project.
The company aimed to meet and overcome determine the criticality of all the operational
the technical and environmental challenges in weight limitations and to determine the range This enabled the operator to make an
the selection of a jack-up rig for the Yolla gas of allowable loading conditions during storm informed decision to select the three-leg
field off the south coast of Victoria. events of varying severity. SeaDrill jack-up rig “West Telesto” for
installation alongside the Yolla A platform.
The company’s team of jack-up and This allowed the operator to optimise the
geotechnical specialists have been working intended drilling program while staying within The findings also helped reassure all parties
with Origin Energy, operator of the BassGas the safety requirements of the project. of the parameters for installation.
Joint Venture (JV), since 2011 to identify the
optimal jack-up rig to install alongside the It also enabled the project team to assess The comprehensive review of operational
already-operational Yolla A platform in the what critical path activities and times scales capability and allowable loading conditions
Bass Strait. would be needed to recover the rig to a safe contributed to the safety case that the operator
operational weight, and hence, create a decision submitted to the Australian offshore safety
To do this, DNV GL’s team of specialists had flow chart that would guide operations. authority, NOPSEMA.
to consider many site-specific challenges.
This would minimise the risk of downtime Facing the onset of a deteriorating season,
These included evaluating the area’s complex due to adverse weather conditions, keeping the and after a short spell waiting on more
soil conditions, which were at risk of significant project on schedule and within budget. favourable weather conditions, the West
degradation during pre- and environmental Telesto was successfully installed alongside the
loading, as well as the implications of the site’s To resolve these issues, a graphical tool was Yolla A Platform in January 2015.
location in the Bass Strait – an area of frequent developed that represented the limits of the rig
and often severe storms. in operating and extreme environments. DNV GL’s Singapore office provided marine
warranty approval for the project, and a
The site’s environmental conditions were This novel graphical representation allows geotechnical specialist from the London office
such that the risk of platform contact and direct comparison with the information was on board to assist with decision-making
contained onboard with the rig-weight and verification of the analysis by monitoring
monitoring system. the real-time installation response. l
CELEBRATING 34 YEARS OF PUBLISHING IN AUSTRALIA ENERGY PUBLICATIONS 17
