Exploration Excellence from Frontier to Mature Basins
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Exploration Excellence from Frontier to Mature Basins

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Cairn India employs an entrepreneurial strategy of using appropriate leading edge technology to search for commercial hydrocarbons by drilling high risk but high reward wells on prospective structures ...

Cairn India employs an entrepreneurial strategy of using appropriate leading edge technology to search for commercial hydrocarbons by drilling high risk but high reward wells on prospective structures in and around India. Cairn is an established major long term exploration player in India with an enviable track record of successful oil and gas exploration including more than 40 discoveries in the last 10 years, building an acknowledged exploration success ratio that exceeds 50%. As a result, Cairn India boasts an extensive resource base across 10 blocks in India and is the operator of the first licensed acreage in Sri Lanka.

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Exploration Excellence from Frontier to Mature Basins Exploration Excellence from Frontier to Mature Basins Document Transcript

  • E x p l o r at i o n E x c E l l E n c E f r o m f r o n t i E r s t o m at u r E B a s i n s cairn india limited from Frontiers to Mature Basins Exploration Excellence Energy for India
  • 2 E x p l o r at i o n E x c E l l E n c E f r o m f r o n t i E r s t o m at u r E B a s i n s cairn india employs an entrepreneurial an enviable track record of successful strategy of using appropriate leading- oil and gas exploration including more edge technology to search for than 40 discoveries in the last 10 years, commercial hydrocarbons by drilling building an acknowledged exploration high risk but high reward wells on success ratio that exceeds 50%. as a prospective structures in and around result, cairn india boasts an extensive india. the key tools used by the resource base across 10 blocks in india company are seismic data, including and is the operator of the first licenced novel acquisition, processing and acreage in sri lanka. interpretation, integrated geological evaluation, basin modelling to predict underlying this exploration success is hydrocarbon generation, migration and the belief in “drill bit exploration”; the charge distribution, and petrophysical company has drilled 181 exploratory evaluation of well data. the company and appraisal wells versus 56 obligation invests extensively in developing wells in 10 years resulting in more than high quality in house technical 25 discoveries made so far in rajasthan, capabilities, buidling expert knowledge providing oil in place of 3.6bn barrels and implementing new technology. of oil equivalent (boe). indeed, 3 of the additionally, cairn has a sharp 7 landmark discoveries made in india focus on the best Health, safety and since 2000 have been made by cairn. Environmental (HsE) practice, ensuring the safety of employees, the integrity of the business, and the environment in which we work. cairn is an established major long term exploration player in india withcairn india limited purpose-built, mobile, low cost drilling rig HsE in action, safely shooting land seismic exploring in the desert of rajasthan with the acquisition-explosives team and flag man
  • 3 E x p l o r at i o n E x c E l l E n c E f r o m f r o n t i E r s t o m at u r E B a s i n s cairn india limited cairn india Exploration portfolio and producing assets(mB-DWn-2009/1 and KG-osn-2009/3 provisionaly awarded under nElp Viii)
  • 4 E x p l o r at i o n E x c E l l E n c E f r o m f r o n t i E r s t o m at u r E B a s i n s in January 2004, cairn discovered the largest onshore oil field in india since 1985 – the mangala field in rajasthan followed by the Bhagyam and aishwariya oil fields. these three fields have a combined oil in place of more that 2 billion boe. Exploration is inherently associated with risk and uncertainty. Determining the probability of success of an exploration well is based on a comprehensive understanding of the petroleum system in the basin and the associated geological risk. in the first instance, access to regional proprietry databases and high resolution seismic has been a significant factor in cairn india exploration acreage in rajasthan cairns success story. over the years cairn overlain on high resolution gravity anomaly has invested in georeferenced regional data. regional faults shown in white gravity, magnetic and seismic data sets, and has used these to create regional models of basin distribution and evolution through time. these databases are calibrated to local data acquired by cairn india and used as a front-end exploration screening tool and linked to plate tectonic reconstructions of basin evolution. the company’s knowledge of depth to basement across all the key petroleum basins in india and of basin fill evolution is unrivalled in india. similarly, our investment at the basin scale in seismic imaging and optimised seismic acquisition and processing parameterisation has provided world an image from a regional exploration tool class subsurface imaging. High resolution unique to cairn india-showing integrated gravity-magnetic-modelled depth to basement seismic, combined with appropriate imaging of basin distribution. Basin in blue coring and reservoir description provides colour, basement in red and yellowcairn india limited our subsurface teams with the ability
  • 5 E x p l o r at i o n E x c E l l E n c E f r o m f r o n t i E r s t o m at u r E B a s i n sto generate high resolution, calibrated deltaic deposits. Emerging plays in themodels of depositional facies, source rock Barmer Basin include stratigraphic trapsdistribution and seal properties. cairn in post-rift sequences and deep waterindia has a current portfolio that includes a depositional systems in the KG basin anddiversity of basins, plays and depositional sri lanka. the overall exploration strategyenvironments.Exploration activity across is to maximise resource additions fromthe spread of frontier to proven, mature key assets with a focus on high impactbasins provides a balanced risk in the exploration.portfolio with significant upside butmanifold opportunities in basins that are With 10 existing blocks, a growingunderstood well. this is particularly the portfolio including 2 new nElp Viiicase in the Barmer Basin of rajasthan provisional awards (subject to thewhere advanced basin analysis ministry of petroleum and natural Gastechniques have revealed several new approval), cairn india explores acrossunexplored plays in an extensional a range of operating environmentsrift basin with more than 25 existing (onshore to deep water) and hasdiscoveries. our historical exploration established a remarkable track recordefforts have developed considerable of success. our current major activitiesexpertise in rift basins with lacustrine include 1450 km2 of deep water 3Dsources and syn-rift reservoirs and passive seismic acquisition in sri lanka leadingextensional margins with marine and to drilling of 3 exploratory wells in 2011, w3D interpretation of an exploration prospect with integrated a treflection seismic and coherence volume cairn india limited e r
  • 6 E x p l o r at i o n E x c E l l E n c E f r o m f r o n t i E r s t o m at u r E B a s i n s Seal Breached Reservoir Migration Pathway ‘the prize’-high quality sandstone reservoir (top, thin section, middle, scanning electron micrograph) showing intergramular porosity. Bottom: cairn india is a trend setter in the novel use of fluid inclusions to identify petroleum systems and (left ) fluid inclusions stratigraphy to interpret migration pathways and breached palaeo structures in dry wellscairn india limited
  • 7 E x p l o r at i o n E x c E l l E n c E f r o m f r o n t i E r s t o m at u r E B a s i n sintegration: from seismic to core sample to 3D immersivevisualisation, integration of critical data is characteristic of cairnindia’s exploration philosophy800 km2 of 3D seismic acquisition and drilling of 3exploratory wells in the palar block, a 5 well onshoreexploration programme in the KG basin, and a rollingprogramme of onshore seismic acquisition and welldrilling in rajasthan.to explore for hydrocarbons effectively, cairnindia embeds regional high resolution predictionof hydrocarbon phase and volume distribution inprospects from basin models, incorporating geologicalrisks in the play, as a routine integrated part of itsexploration activity. these models are based on anunderstanding of basin evolution and heat flow,stratigraphy and facies distributions. the models arecalibrated with temperature data from wells, includingpalaeo-geothermometers, and a unique hydrocarbonshows database which includes present day andpalaeo-hydrocarbon distributions from fluid inclusionstratigraphy.in many areas, particularly frontier basins, the datarequired to construct and calibrate models are scarce,and may have large inherent uncertainties. thus,it is essential that basin modeling allows simulation cairn india limited
  • 8 E x p l o r at i o n E x c E l l E n c E f r o m f r o n t i E r s t o m at u r E B a s i n s early stage of its exploration project life cycle that capture the critical aspects of the geological system, runs multiple simulations, and incorporates results as probabilities into prospect evaluation. as an exploration area matures, more complex and ‘deterministic’ models can be constructed and calibrated to thermal, stratigraphical, geochemical and rock property data, as exemplified by our exploration success in the Barmer Basin of rajasthan. in all cases, basin models are incomplete representations of the sub-surface, dependent upon the limited availableGis-based depositional environment map inputs (minute in terms of basinshowing facies distribution used as an input for volume), inadequacies of the numericalbasin modelling simulator used and the time available forof multiple ‘scenarios’ to ask ‘What model building. confidence in modelif?’ questions, for investigating the predictions arises from the stability ofsensitivity of petroleum systems to critical results in sensitivity studies. statisticalparameters or key unknowns – such as calculations performed on the outputthermal history, source rock thickness, models test the sensitivity of the modelmigration efficiency or trap leakage for to input variables. the probabilityexamples. to do this effectively, cairn distribution of oil and gas accumulationsindia constructs basin models at an for hundreds of input parameter variations can then be calculated for each prospect to determine the best probability of success. cairn india limited.3D basin model (shown on a depth surface) predicting hydrocarbon migrationpathways (green lines) and oil (green) and gas (red) accumulations
  • CAIRN INDIA LIMITEDcairn india is one of the largest independent oil and gas exploration and productioncompanies in india. it is headquartered in Gurgaon near Delhi and has materialexploration and production positions in nine blocks in india and one in sri lanka.cairn produces oil and gas from three blocks in india: ravva in andhra pradesh,cB-os/2 in the cambay Basin in Gujarat and rJ-on-90/1 in rajasthan where itworks in partnership with onGc. in 2007, cairn india was listed on the nationaland Bombay stock Exchanges.cairn has been operating in india for more than 15 years and has played anactive role in developing the oil and gas resources in the country. the mangalafield, discovered in January 2004 near Barmer, rajasthan and dedicated to thenation in august 2009 by the prime minister, the Hon’ble Dr. manmohan singh,is the largest onshore oil discovery in india in more than 20 years. the mangala,Bhagyam and aishwariya fields have recoverable oil reserves and resources ofapproximately 1 billion barrels.in total there have been more than 25 discoveries on the rajasthan block and thecompany is focused on exploiting the full potential.cairn india will account for more than 20 percent of india’s domestic crudeoil production when the rajasthan fields reach the current approved plateauproduction rate of 175,000 barrels of oil per day in 2011.Health, safety and the environment are integral to cairn india’s businessmanagement and the company is committed to working with all stakeholders todeliver material growth.
  • www.cairnindia.com