Oil and gas exploration, and production life cycle
Cairn looks to create, add and realise value for
stakeholders, but not at the expense of the safety and well-being of
people and the environment. We manage the risks associated with our
business responsibly for all our activities and wherever we operate.
This means, we aim to behave professionally in our dealings with people
and within the environment from the very start of any project or
activity.
The oil and gas business is, by nature, long-term and our approach
covers every stage of the oil and gas life-cycle and is outlined below.
1. Due diligence
Before making an acquisition or investment, applying for an
exploration licence or farming-in to an existing project, Cairn carries
out an extensive risk-screening process which includes assessing whether
there are potential health and safety, social, human rights, political,
corruption, security or environmental impacts. This is used in
decision-making on whether or not to proceed and if investment goes
ahead it informs approaches to risk management going forward.
In 2014 we conducted due diligence on farm-in opportunities including
the Mesana blocks in Spain. We farmed-in to the PL420 block and
drilling project operated by Statoil in the Norwegian sector of the
North Sea. We also farmed out of UK sector blocks P2040 and P2086,
reducing our interests south of Catcher.
2. Prequalification
When we apply for an exploration licence, the necessary documents are
submitted to the relevant authorities. Typically this includes
information about our legal status, financial capability, technical
competence and plans to manage health, safety and environmental risks,
and contributions to local economic development.
In 2014 Cairn participated in the 23rd licensing round in the Barents Sea, Norway.
3. Exploration seismic
Once Cairn has been awarded the right to explore in a certain area,
we may carry out seismic surveys to develop a picture of geological
structures below the surface. This helps identify the likelihood of an
area containing hydrocarbons. Seismic surveys are usually preceded by an
assessment of environmental, social and human rights impacts, which are
managed through the Project Delivery Process (PDP).
During 2014 Cairn successfully completed seismic surveys offshore the
Republic of Ireland and Malta. As non-operator, we also participated in
seismic operations offshore Western Sahara. Application for seismic
surveys is pending offshore the Gulf of Valencia.
4. Site survey
Before commencing any drilling activity, site surveys are carried out
to gain more detailed information on the area where an exploration well
may be drilled, and to confirm that the selected drilling location is
safe and that any sensitive environments can be avoided.
The process normally involves taking geological samples from the
seabed and carrying out shallow seismic surveys. These activities have
low social and environmental impacts and therefore usually do not
require a separate Environmental Impact Assessment (EIA) or Social Impact Assessment (SIA).
Pre- and post-drilling surveys were completed for wells offshore Senegal and following drilling offshore Morocco.
5. Exploration drilling
Exploration wells are drilled to determine whether oil or gas is
present. This phase can be accompanied by a step-change in activity and
visibility to local people as offshore exploration can involve a
drilling rig, supply vessels and helicopters for transporting personnel.
Exploration drilling is preceded by an assessment to understand
potential health, safety, environmental, social, security and human
rights impacts. These assessments identify appropriate steps to reduce
impacts, manage risks and assist in operating responsibly. Limited
community development programmes may also be put into place at this time
depending on the nature of the programme.
In 2014 we continued our exploration drilling campaign offshore
Morocco, and initiated and completed an exploration drilling campaign
offshore Senegal. We were also involved, as non-operator, in exploration
drilling in the UK and Norwegian North Sea. Drilling in the Cap
Boujdour block, offshore Western Sahara, commenced in December 2014.
6. Appraisal drilling
If promising amounts of oil and gas are confirmed during the
exploration phase, field appraisal is used to establish the size and
characteristics of the discovery and to provide technical information to
determine the optimum method for recovery of the oil and gas. The
potential social and environmental impacts associated with appraisal
drilling are comparable to exploration drilling, and similar assessments
are carried out in advance.
Due to the delay in refurbishment of the Blackford Dolphin rig, the
proposed Spanish Point appraisal well, offshore Republic of Ireland,
could not be drilled in 2014 during the safe weather window and was
therefore postponed. Plans are well advanced to drill this well, subject
to the necessary approvals. Preparation for anticipated appraisal
drilling in Senegal is also underway.
7. Development
If appraisal wells show technically and commercially viable
quantities of oil and gas, a development plan is prepared and submitted
to the relevant authorities for approval. This includes a rigorous
assessment of all the potential risks and a long-term assessment of
environmental and social impacts covering a timeframe of between 10 and
30 years. The plan will also detail projected benefits to local
communities, for example employment and supplier opportunities, as well
as proposing how to manage potential impacts such as an influx of
workers from outside the local community. At this stage good design is
important to remove and mitigate risks to an acceptable level as well as
managing construction and installation in a manner to likewise minimise
impacts.
We are participating as non-operator in two development projects, the Kraken and Catcher fields, in the UK North Sea.
8. Production
A variety of options are available for the production of oil and gas.
During this phase, which can last many decades, regular reviews are
made of social and environmental performance to ensure that impacts
identified in the assessments are mitigated. Changes in the risks
associated with activities are assessed throughout the production
period. Safe operations remain an ongoing requirement at this stage,
which means personnel are competent and good HSE behaviours are in place
and equipment is properly maintained and operated.
We currently have no operated production, but historically had
significant production through our Indian business, Cairn India Limited
(CIL), which we subsequently exited. Our involvement in exploration, and
latterly production in India, brought social and economic development
to a number of regions.
We anticipate production from our non-operated Catcher and Kraken fields from 2016/2017.
9. Decommissioning
This phase occurs when hydrocarbons can no longer be extracted safely
or economically at the end of any field life-cycle. Decommissioning
consists of closing operations in a manner that protects people and the
environment and to avoid unacceptable legacy issues for local
stakeholders and the Company. We are not engaged in any decommissioning
activities at this time.