Dec 01, 2007 toxic chemicals linked to development of the kashagan oil field in kazakhstan are polluting the caspian sea environment and damaging the health and livelihoods of local communities. At its largest point the reservoir contains a gas column 1,450 metres 4,760 ft deep with a 200 metres. Pdf the kashagan field is a huge carbonate formation located 4. Forty years later, a survey of the worlds five largest offshore fields by estimated recoverable reserves is a stark.
Without much international fanfare, the worlds largest offshore oil field and the largest discovered in the last 40 years, kazakhstans kashagan field, is on the verge of finally moving. Lead reservoir engineering specialist kmg kashagan b. The reservoir is saturated by overpressured light oil, and the development is based on. Oil from the kashagan field will supply the kazakhstanchina oil pipeline. For the oil companies seeking to develop them, they entail tremendous. Caspian shelf and its crown jewel the giant kashagan oilfield known since. New insights on hydrocarbon plays in the caspian sea.
The zohr discovery was a gamechanger for the region proof of a new play the eastern mediterranean has a complex, longlived tectonic history the eastern mediterranean has a favourable petroleum systems framework about 12 km of sediments in levantine with multiple source rocks, so with stacked petroleum systems and a first class messinian evaporitic seal. Kashagan field is one of the largest oil fields discovered in the last 30 years. The field is located on the northeast shore of the caspian sea and has estimated oil and gas recoverable reserves of more than 6 billion barrels and 12tcf respectively. Royal dutch shell has pulled out of the khazar offshore project next to the giant kashagan field in kazakhstan and a multinational consortium including shell is also dropping plans for the. Kazakhstan has the largest oil field outside the middle.
May, 20 kashagan oil field analysis of geology, geophysics and petroleum system 1. Kashagan field is an offshore oil field discovered in the kazakhstan sector of the caspian sea in 2000. Karachaganak field is a gas condensate field in kazakhstan. The chief drawback is that the association of carbonate reservoirs with anhydrite in the seal has led to the. The kashagan field is a huge carbonate formation located 4. Of these, the kashagan, the tengiz and the karachaganak fields can. The kashagan story is about geopolitical gambling with big oil in the caspian sea and inflating the oil bubble in global markets. Introduction the kashagan oil field is located in the northern caspian sea, western kazakhstan fig. Akhil prabhakar subrat sundarayabhinav singh sunita. The seven largest fields are galkynysh gas field in the amadarya basin with an original 2p reserve of 67. The field is located under the presentday north caspian sea, offshore kazakhstan, and has been penetrated by two exploration wells.
Production sharing agreement psa, covering a total of 5,600 km. The kashagan field was discovered in 2000 by a consortium of oil companies. The discovery of the supergiant kashagan field in 2000 by the offshore. Oil field production geology geoscienceworld books. The operator of the field, agip kco, estimates that kashagan contains up to 38 billion barrels of oil, of which billion are potentially recoverable.
Kashagan is the most important field in the 11 blocks falling under the north caspian sea. The recently announced super giant kashagan discovery in the kazakhstan sector of the north caspian sea is the worlds largest discovery in three decades. Kashagan and tengiz castor and pollux daniel johnston and david johnston adapted from petromin magazine 15 december, 2001. The kashagan field, located in the shallow waters about 58 metres of the kazakh north caspian sea, is the worlds largest current development project. Article details kashagan field geological description.
Kashagan field geological description researchgate. The north caspian basin is a petroleumrich but lightly explored basin located in kazakhstan and russia. The reservoir is saturated by overpressured light oil, and the development is based. Petroleum geology and resources of the north caspian basin.
Ulmishek foreword this report was prepared as part of the world energy project of the u. Field country discovery year ultimate recoverable reserves gb kashagan kazakhstan 2000 79 azadegan iran 1999 69 roncador brazil 1996 2. Field activities are carried out according to the north caspian sharing agreement by major national and international oil companies. The discovery of zohr gas field in egypt august 2015 what do we know about the zohr field. Kashagan oil field, believed to be the fifth largest ever discovered in the world and the largest discovered in the past 30 years has estimated total reserves of as high as 50 billion barrels of oil with up to 1520 million which are estimated to be recoverable and 25 tcf of natural gas, babali, 2009. The petroleum geology of kazakhstan search and discovery. Kashagan is the largest of the fields discovered worldwide in the last 40 years. The giant kazakhstani oilfield, kashagan, is one of the worlds biggest oil finds and the biggest oil discovery of recent times 1. Pdf reservoir rock types application kashagan researchgate. This latter well was the first well in bu hasa onshore giant oil field. Development strategies for mature oil field in south kazakhstan software skills developed. Kashagan is the largest field in kazakhstan and its development is one of the worlds most challenging and capitalintensive projects. Kashagan field is an oil field located in kazakhstan. The shallow water offshore development consists of 35 drilling centers, five processing trains, two offshore processing hubs, three offshore gas plants, an onshore terminal comprising multiple oil trains and gas sweetening plants for fuel gas, 1,000.
Evaluation of saltsection and interpretation of wells in. Kashagan has a stoiip of perhaps 38 billion barrels estimated up to billion barrels recoverable. The second section examines the specifics of the existing production sharing agreements and the key domestic legislative. The field, discovered in 2000, is located in the northern part of the caspian sea close to atyrau and is considered the worlds largest discovery in the last 30 years, combined with the tengiz field it is estimated that the kashagan field has recoverable reserves of about billion barrels 2. Research paper the petroleum geology of the cretaceous.
The reservoir geology is modeled by means of detailed geological grids. The provinces have been ranked according to the discovered. Exploration efforts were focussed on the onshore areas of both basins and led to significant discoveries. Shell, consortium exit two kazakh offshore projects reuters. It is located offshore in north caspian sea, republic of kazakhstan. A recent new oil discovery on the kashagan structure offshore in the caspian sea is probably also of the supergiant status. Kashagan core characterization exhibits dissolution related to exposure meteoric karst and the migration of burial fluids burial karst. Kashagan oil field analysis of geology, geophysics and. Petroleum geology, resourcesnorth caspian basin usgs.
One of the larger discoveries of this decade, it is estimated that the kashagan field has commercial reserves from 9 billion. Kashagan oil field analysis of geology, geophysics and petroleum system 1. Three new wells were drilled in east kashagan ke4, ke6, ke. May, 2020 the kashagan contract area contains the supergiant kashagan field and its satellites, located offshore in the north caspian sea. Kashagan oil field seen by total producing 2017 at latest. Northcaspian regionshowing kashaganand adjoining oilfields 3. Kashagan field, kashagan east 1 and west 1 geology.
Kashagan oil field and the consortium that has been developing it since 1997. The kashagan field is one the largest discoveries made in the last several decades. The oil is hosted within a late paleozoic isolated carbonate platform that is approximately 75 km in length and 35 km in width. The kashagan field in kazakhstan covers 1,034 square miles and is located at a depth of four to six meters. Exploration in those provinces in which oil and gas has already been extracted had, by 2010, led to the discovery of more than 200 oil, gas, oil andgas and condensate hydrocarbon accumulations.
The field was once a massive permian and carboniferous reef complex covering an area 30 by 15 square kilometres 11. Pdf kashagan is a worldclass supergiant oil field located in. Completed road after 2 very cold winters case study project. Kashagan oil field development friends of the earth europe.
Kashagan offshore oil field project for the worlds largest oil field discovery in the past forty years, only proven coating protection would do. Petroleum geology and resources of the north caspian basin, kazakhstan and russia by gregory f. Akhil prabhakar subrat sundarayabhinav singh sunita mohapatraankit khaitan tanmay biswas 2. Kashagan is a carbonate platform of the late devonian to middle carboniferous age. The field, discovered in 2000, is located in the northern part of the caspian sea close to atyrau and is considered the worlds largest discovery in the last 30 years, combined with the tengiz field. Giant fields retain dominance in reserves growth oil. Integrated karst characterization from seismic to geologic. Supply from the field is expected to regain planned levels in the next two days, kazakhstans energy ministry said by email. Oil and natural gas production is growing in caspian sea.
Pdf kashagan is a worldclass supergiant oil field located in kazakhstan, in the offshore of caspian sea. The governments share in oil and gas payable as a royalty in. Kashagan field is an offshore oil field in kazakhstans zone of the caspian sea. The worlds largest offshore oil field is back in action. Evaluation of saltsection and interpretation of wells in the kashagan. With the start of the project being delayed for years now the start date has been moved to 2016 due to several environment, legal, and investmentassociated complications, it is also the worlds most expensive standalone project 2. Giant kashagan oilfield resumes output after power disruption. Pdf critical evaluation of infill well placement and. Kashaganoil fielddevelopment kazakhstan introduction 3 1 executivesummary 4 2 politicalandeconomiccontext 5 3 kashaganoilfield 6 fielddescription 6. Based on the core study and integrated with well results, including available dynamic data, stratigraphic position, karst analogs and knowledge of karst processes, each geobody is interpreted as either. A recent new oil discovery on the kashagan structure.
The maximum oil column is 300 ft and the area of surface closure is 155 mi 2. Included in a march 30 press release from the caspian pipeline consortium cpc was a note indicating that the. According to ncoc, the kashagan field also holds about 52 tcf of associated gas. Much of the reserves are concentrated in the supergiant tengiz, karachaganak, and astrakhan fields. It has now performed its function perfectly as anticipated for two summers and two winters thus demonstrating its unique ability to deal with these challenging problems in this harsh environment. Credited with 11 billion bbl of oil in place, it is a waterdrive field that could, and probably will, recover nearly 50 percent of its total oil. It occupies the shallow northern portion of the caspian sea and a large plain to the north of the sea between the volga and ural rivers and farther east to the mugodzhary highland, which is the southern continuation of the ural foldbelt. The field is operated by a consortium including exxon, shell, eni, total, cnpc, and japans inpex, along with kazakh state oil company kazmunaygaz. The kashagan contract area contains the supergiant kashagan field and its satellites, located offshore in the north caspian sea. Kashagan kazakhstan a giant field that will begin reinjecting highpressure h2s in 2012. Pdf advanced upscaling for kashagan reservoir modeling.
The north ustyurt basin contains an estimated discovered oil and gas reserve of about 2. Conditions at the kashagan gas and oil field the largest oil field discovered in several decadesare far from ideal. Pages in category oil fields of kazakhstan the following 20 pages are in this category, out of 20 total. It is currently estimated that the field holds about 35. The bunker huntbritish petroleum sarir oil field of libya appears to be one of the 10 to 12 supergiants of the world. In the project, the world was divided into 8 regions and 937 geologic provinces. When discovered, it was the second largest oil field. It also gives practical guidelines as to how a production geologist can analyze the reservoir geology and fluid flow characteristics of an oil field with the aim of improving hydrocarbon recovery. It is a large, isolated carbonate bank, one of the biggest buildups in an archipelago that characterized the precaspian basin from the devonian to the carboniferous and that now hosts large hydrocarbon reserves. Its knowledge in this area is already longstanding, drawing notably on the groups presence in abu dhabi since 1939, its development and production of the huge sour gas field at lacq france beginning in the 1950s, and the operation of the abu al bukhoosh abu dhabi field for more than. Petroleum geology of the western ustyurt basin, republic. Recently, however, the discovery of the giant kashagan, kalamkassea and. The field, which is set to produce 370,000 barrels of oil a day, is to start output by september, eight years later than initially planned and with costs nearing usd 48 billion, double the. Kazakhstan says the massive kashagan oil field will begin production again this fall.
Kashagan is an isolated, presalt carbonate platform. It is located about 150 kilometres 93 mi east of oral uralsk in the northwest of kazakhstan. Sep 07, 20 in 1973, the arab oil crisis made americans care about energy security. The current north caspian psa companies are affiliates of.
Figure 6a shows a seismic section across the super giant tengiz field illustrating a massive, 1. It is also worth mentioning that kashagan is not the only mega oil field in kazakhstan, with the country holding up to 30 billion barrels in oil reserves. The area has significant oil and natural gas reserves from both offshore deposits in the caspian sea itself and. The caspian sea region, which includes russia, azerbaijan, kazakhstan, turkmenistan, uzbekistan, and iran, is one of the oldest oil producing areas in the world and is an increasingly important source of global energy production. Pdf case study of the kashagan oil field project vlad. Kashagan field consists of carbonate reservoir in the form of limestone and dolomites. Toxic chemicals linked to development of the kashagan oil field in kazakhstan are polluting the caspian sea environment and damaging the health and livelihoods of local communities.
Kashagan offshore oil field offshore technology oil and. Knrl beirser is an enplontion geobgist in tlre international explorarion dcpanmcnt of kcrrmcgee oil and ga. The reef is about 75km long and 35km across, with a narrow neck joining two broader platforms kashagan east and kashagan west. India loses kashagan oil field to china pakistan defence. Kashagan is probably the largest oil field outside the middle east and the fifth largest in terms of reserves, and may account for onethird of kazakhstans current oil reserves.
Kashagan oil field analysis of geology, geophysics and petroleum system. The presence of high quality reef reservoir was a surprise to the industry because. Large accumulation 30 tcf of gas in a miocene carbonate reef reservoir. Kashagan is crucial for the future oil and gas output of kazakhstan, but represents one of the most complicated oil field developments to date. Vuggy porosity related to leaching is better developed in reef reservoirs, especially in reefcore carbonates. Reservoir properties of carbonate rocks strongly depend on diagenetic changes, primarily on leaching. In the recent past, little was known about the geology of both the north caspian. Kashagan, described by one geologist as mad, bad and dangerous to know. Sovereign kazakhstan has become hostage to its oil sector and can face serious economic loss and an environmental disaster in the region by developing an oilfield as challenging as kashagan. It explains the background to production geology in the context of oil field subsurface operations.