Dunlin group sequence stratigraphy in the northern north sea. The field is related to block 3410 which is approximately 175 km. Structural geology of the gullfaks field, northern north sea. Seismic attribute analysis in structural interpretation of. This is a quick reference to concepts, tools, formulas, and techniques on everything from economics and land leasing to wellsite and engineering methods. The development plan is to ultimately drill over horizontal laterals to produce the 810 api gravity oil. Phase 1 was approved in conjunction with the statpipe system and involved two platforms a large concrete drilling and processing platform and a smaller concrete. High degrees of modeled oil degradation, resulting rock matrix alteration and nahcolite formation lead to co 2 and ch 4 partial pressures similar to those observed in the areas of the gullfaks field with strong degradation.
The gullfaks a platform began production on 22 december 1986, with gullfaks b following on 29 february 1988 and the c platform on 4 november 1989. The crude oil is stored in the concrete base of the platforms and loaded into tankers via two separate mooring buoys. The first survey was acquired in 1985, prior to the production start in 1986, a second survey was acquired in 1995, followed by a third in 1996. The field is located mostly in block 3410 in the norwegian sector of the north sea fig. Known oil field size and grown oil field size versus field discovery year for central arch horstblock anticlinal oil and gas assessment unit 41. In addition to providing excellent structural images, the dense sampling of 2d and 3d survey can sometimes make it possible to map reservoir quality and the distribution of hydrocarbon with wellmarked limitations. The deepest well on the gullfaks field 34\10 was drilled to ca 3350 m depth and penetrated 40 m of triassic sands and shales of the hegre group. Gullfaks represents the shallowest structural element of the tampen spur. Nov 21, 2016 2d and 3d seismic data have emerged as a key tool in the oil and gas industry to visualize and understand subsurface morphology and boundaries. Tilted fault blocks is the major trapping mechanism in the gullfaks field. The gullfaks field giant oil and gas fields of the.
Acoustic and elastic impedance models of gullfaks field by. The gullfaks giant oil field in the norwegian sector of the north sea was discovered in 1978. The gullfaks field contains oil reserves on the order o. The present study is mainly concerned with data from the jurassic layers in the gullfaks field, and thus with the late jurassic rift phase. Gullfaks oilfield in the north sea, where more than 170 wells have been drilled and extensive well data of various. Ekofisk is an oil field in block 24 of the norwegian sector of the north sea about 320 km 200 mi southwest of stavanger. The use of dipmeter data to constrain the structural geology. The gullfaks 4d seismic study petroleum geoscience. The gullfaks ab and gullfaks c streams were commingled as of may 1, 2005. In addition to providing excellent structural images, the dense sampling of 2d and 3d survey can sometimes make it possible to map reservoir quality and the distribution of hydrocarbon with wellmarked. Pdf structural geology of the gullfaks field, northern. The ekofisk field is a northsouth trending anticline, with a central graben, forming a structure that is 49 km 2 19 sq mi in area, with 244 m 801 ft of vertical closure and a hydrocarbon column 305 m 1,001 ft long, formed by permian zechstein salt movement in the form of salt pillows.
It was discovered in 1978, in block 3410, at a water depth of 230 meters. Ranked as a giant by world standards, gullfaks is one of the largest discoveries on the northwest european continental shelf. It represents the shallowest structural element of the tampen spur, and was formed during the upper jurassic to lower cretaceous as a sloping high, with a westerly structural dip gradually decreasing towards the east. Reservoir management of the gullfaks main field onepetro. The gullfaks oil field is located in the norwegian sector of the north sea, in block 3410, approximately 175 km northwest of bergen, see figure 1. To read pdf files, you will need the acrobat pdf reader, available free from adobe. The gullfaks field is situated southeast of the statfjord field and south of the snorre field in the northern north sea, west of viking graben as shown in figure 1. Estimating fault seal and capillary sealing properties in. The production and exploration geologists best data base for saving time. Known gasfield size versus field discovery year and grown gasfield size versus cumulative number of newfield wildcat wells for central arch horstblock anticlinal oil and gas assessment unit 42. This book is a usefulprimer for geophysicists, geologists, and petroleum engineers in the oil industry who wish to expand their knowledge beyond their specialized area.
Statoil gullfaks this oil field lies in 220 metres of water in the northern north sea. Statfjord is a field in the tampen area in the northern part of the north sea, on the border between the norwegian and uk sectors. It can be concluded that, the presence of high quality source and reservoir with thick seal and efficient trapping mechanism has constructed an effective petroleum system in the gullfaks field containing high quantity of hydrocarbon reserves. Dip, relief, azimuth and amplitude maps are most useful. Covering an area of 75 km 2, the field is developed by three. Discovered in 1969 by phillips petroleum company, it remains one of the most important oil fields in the north sea. Statfjord, the largest field in western europe in terms of recoverable oil, is located in the northern part of the province on the boundary between the. This was the first discovery of oil after the drilling of over 200 exploration wells in the north sea triggered by the groningen gas field discovery. A time lapse analysis was performed on two 3d seismic datasets 4d seismic acquired over the northern part of the gullfaks oilfield in the north sea.
Two structurally distinct subareas have been revealed a major domino system and an. If you are in the petroleum geology business this is a musthave volume. The gullfaks field contains oil reserves on the order of 230 million standard m 3. Geologic overview and petroleum systems of the greater. Spe 1260 reservoir management of the gullfaks main field. It was formed during the upper jurassic to lower cretaceous as a sloping high, with a westward structural dip gradually decreasing toward the east. It represents the shallowest structural element of. The geology is complex and has required extensive map. This was then used to identify miscible gas injection target areas where 2d reference or truth models of characteristic. Areas of higher shale gouge ratios 20% were more likely to seal on the basis of pressure history and chemical tracer movement between wells. The book provides a wideranging coverage of brent group ge. Indication of transpressional tectonics in the gullfaks.
Kimmeridgian shales total petroleum system of the north sea. The gullfaks oil field is located in the norwegian sector of the northern north sea. Gullfaks produces oil from middle jurassic sandstone in the brent group, and from lower jurassic and upper triassic sandstone in the statfjord group and cook. Gullfaks main represents the main reservoir containing 78% of the total inplace oil volumes and 88% of the recoverable reserves. Reservoir architecture of the cook formation on the gullfaks field based on sequence stratigraphic concepts. Jakobsen, plagioclase dissolution related to biodegradation of oil in brent group sandstones middle jurassic of gullfaks field, northern north sea, sedimentology, 48, 4, 703721, 2001. The gullfaks area with field, discoveries and prospects are shown in fig. For example, a total of 110 horizontal wells had been drilled prior to 2002 in the hamaca field in venezuelas orinoco heavy oil belt. Production began at tordis in jan 94, at vigdis in 1997 and at borg in jul 99. Gullfaks satellites consist of gullfaks sor, rimfaks, gullveig, skinfaks and gulltopp. The gullfaks area consists of a number of oil and gas fields located to the east of statfjord. The field has been developed with three integrated processing, drilling and accommodation facilities with concrete bases gullfaks a, b and c.
The main gullfaks oil field was granted development approval on a staged basis. This third edition of elements of petroleum geology is completely updated and revised to reflect the vast changes in the field since publication of the second edition. A study of the middle jurassic rannoch formation in the gullfaks field shows that there is no relationship between the content and distribution of kaolinite and location relative to the late cimmerian unconformity. Kimmeridgian shales total petroleum system of the north. Gullfaks is a field in the tampen area in the northern part of the north sea. These fields have been developed as subsea satellites tied into the gullfaks facilities in the northern north sea. The gullfaks field giant oil and gas fields of the decade. Gullfaks b has a simplified processing plant with first stage separation. Known gas field size versus field discovery year and grown gas field size versus cumulative number of new field wildcat wells for central arch horstblock anticlinal oil and gas assessment unit 42. Optimal use of such maps requires careful filtering and appropriate use of colours and light sources. The large amount of structural data available from the gullfaks field have been used to unravel the structural characteristics of the area.
Basis water ior water basis oil ior oil start prognosis gullfaks fieldstructural setting and reservoir performance, gullfaks field complex fault system main fault system trending northsouth. Structural geology of the gullfaks field, northern north sea article pdf available in geological society london special publications 127. The gullfaks oil and gas field final year project module title. This oil field lies in 220 metres of water in the northern north. Here a refined layer full field streamline front tracking model was developed from the primary history matched black oil waterflood finite difference model. This oil field reached peak production in 2001 at 180,000 barrels per day 29,000 m 3 d. One of the challenges is to distinguish between anomalies related to real geological features and to seismic. The gullfaks area with neighbouring fields in the tampen region.
Spe bergen 2005, gullfaks pressure in sg 1,0 sg kgm3 depth tvd pore pressure fracture. Permanent field installations limit the area where new marine streamer surveys can be acquired. Gullfaks a and c are fully independent processing platforms, with three separation stages. Known oilfield size and grown oilfield size versus field discovery year for central arch horstblock anticlinal oil and gas assessment unit 41. Indication of transpressional tectonics in the gullfaks oilfield, northern north sea haakon fossen statoil, postboks 1212, n5001 bergen, norway received 11 september 1987. Seismic attribute maps provide a useful tool in interpreting faults, particularly those close to or below seismic resolution. Indication of transpressional tectonics in the gullfaks oil field, northern north sea haakon fossen statoil, postboks 1212, n5001 bergen, norway received 11 september 1987. One of the challenges is to distinguish between anomalies related to real geological. Gullfaks was discovered in 1978, and the plan for development and operation pdo for gullfaks phase i was approved in 1981.
How hydrogeochemical modeling can help decipher organicinorganic interactions journal. Jan 01, 2005 the gullfaks oil field is located in the norwegian sector of the northern north sea. Geologic overview and petroleum systems of the greater ghawar. Formation structurally 300 m higher than the ad jacent western fault block. The reservoir units are sandstones of early and middle jurassic age. The gullfaks field is currently owned 70% by statoilhydro and 30% by petoro. Controls on co 2 fate and behavior in the gullfaks oil field norway.
Reservoir and recovery strategy several separate geological structures containing oil and gas are found in the gullfaks block, which lies. Geographically speaking, the gullfaks oil field is situated on the in the norwegian sector of the northern north sea along the western flank of the viking graben. Estimating fault seal and capillary sealing properties in the visund field, north sea figure 8 estimates of supportable hydrocarbon column heights using the equations from sperrevik et al. Associated gas mainly passes into the statpipe network. The gullfaks field is an oil and gasfield located in block 3410. Which type of layers do we have and what is the sequence. This paper solely deals with reservoir management of the main field and hence no more discussion will be made on the satellites. The gullfaks oilfield is located in the northeastern part of block 3410 in the norwegian sector of the north sea. Gullfaks is an oil and gas field in the norwegian sector of the north sea operated by equinor. Timelapse 4d seismic data have been used at gullfaks since 1995 and have contributed significantly to the reservoir management of the field. Unfc applied to gullfaks field oil recovery e1 e2 e3 g1 g2 g3 g4 i1 i2 i3 i4 f1 committed projects % oil recovery f2 contingent projects % oil recovery f3 exploration projects % oil recovery e1. Pdf the large amount of structural data available from the gullfaks field have been used to unravel the structural characteristics of the area. Statfjord was discovered in 1974, and the plan for development and operation pdo was approved in 1976. Purchase of an open document does not constitute license for republication in any form, nor does it allow web posting without prior written permission.
Oil rims, thin oil columns typically lying below a gas cap, can be targeted with horizontal wells. The role of the late cimmerian unconformity for the. The new gullfaks blend is located 160km west of the sogne fjord, 20km southeast of statfjord and 7km southwest of the snorre platform. Gullfaks a and c receive and process oil and gas from gullfaks sor and visund sor. Produced oil is loaded directly into shuttle tankers on the field, while associated gas is piped to the karsto gas treatment plant north of stavanger and then on to continental europe. The use of dipmeter data to constrain the structural. The location and boundaries of the north sea graben province are shown in figure 1. Pdf structural geology of the gullfaks field, northern north sea. The illustrated and quantitatively retraced diagenetic features can be taken as proxies for intense oil degradation. From petrographic data most of the kaolinite is interpreted to be detrital, and only traces of authigenic kaolinite are observed.
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