Gullfaks sor lies in blocks 3410 and 3312 in the northern north sea, where water depths are 220 metres. Gullfaks was discovered in 1978, and the plan for development and operation pdo for gullfaks phase i was approved in 1981. The reservoir units are sandstones of early and middle jurassic age. The danianaged chalk deposits of the ekofisk formation and the maastrichtian tor formation form the main reservoir units in the ekofisk field.
It represents the shallowest structural element of. Geological and geophysical evaluation of the gullfaks field based on 3d seismic interpretation using modern interpretation tools. The analyses have verified the general structure obtained by seismic. Wave equation processing using finitedifference propagators, part 1. The role of the late cimmerian unconformity for the.
Which type of layers do we have and what is the sequence. Read the use of dipmeter data to constrain the structural geology of the gullfaks field, northern north sea, marine and petroleum geology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. The gullfaks field, 1992, in giant oil and gas fields of the decade, 19781988, aapg memoir 54, halbouty, m. Pdf structural geology of the gullfaks field, northern north sea. Schultz, egil rundhovde, atle rotevatn, and simon j. Acoustic and elastic impedance models of gullfaks field by. Together with petrophysical logs, these data were used to compute the distribution of shale gouge ratio sgr. This study was designed to set up a workflow for assessing the impact of structural uncertainty and to test the workflow on a synthetic model to analyze the production response to. Production began at tordis in jan 94, at vigdis in 1997 and at borg in jul 99. The field produces from three separate cbs platforms, the gullfaks a, b and c. In a suggested revision of the lithostratigraphy of the dunlin group, marjanac 1995 recommended that all thick lower jurassic sandstones above the. It was discovered in 1979, in block 3410, at a water depth of 5 meters 442.
The height of the total structure measured from the sea floor is 380 metres 1,250 ft, making it taller than the eiffel tower. Gullfaks is one of the major hydrocarbon producing fields in the norwegian continental shelf. 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. The gullfaks 4d seismic study petroleum geoscience. The use of dipmeter data to constrain the structural. The complexity of the gullfaks field, the presence of gas in the postjurassic section and a variable water depth have complicated seismic interpretation.
The ekofisk formation principally consists of porous. Application of facies analysis in combination with highresolution sequence stratigraphy enables geologists to establish a framework of bounding sur faces and. Geologic note authors fault linkage and graben stepovers in. Accounts of the geology of individual brent group fields are not included, as these are available in the books of spencer et al. The gullfaks giant oil field in the norwegian sector of the north sea was discovered in 1978. A faultseal study has been performed for faults around the a platform of the gullfaks field, northern north sea. The ekofisk field is a giant field which has been producing at a high level for more than forty years and, since 1987, this production has taken place with the support of seawater injection. Pdf structural geology of the gullfaks field, northern. The gullfaks oilfield is located in the northeastern part of block 3410 in the norwegian sector of the north sea. Buckley abstract segmented graben systems develop stepovers that have im. The field is located mostly in block 3410 in the northern part of the norwegian north sea 2. Structural geology of the gullfaks field, northern north sea article pdf available in geological society london special publications 127.
Installation of a host template on the gullfaks satellite field. This paper solely deals with reservoir management of the main field and hence no more discussion will be made on the satellites. Optimal use of such maps requires careful filtering and appropriate use of colours and light sources. Muhammad shahid tamannai and peter conn geophysicist, tgs geological products and services, united kingdom. 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.
Spe 1260 reservoir management of the gullfaks main field. Seismic attribute analysis in structural interpretation of. Jan 31, 2020 the gullfaks area consists of a number of oil and gas fields located to the east of statfjord. Hereafter, if not stated otherwise, the main field will be referred to as the gullfaks. The gullfaks oil field is located in the norwegian sector of the northern north sea. The tordis field, which is located 11 kilometres 6. Geological and geophysical evaluation of the gullfaks field based. 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. Purchase of an open document does not constitute license for republication in any form, nor does it allow web posting without prior written permission. The main gullfaks oil field was granted development approval on a staged basis.
American association of petroleum geologists, isbn 08918330, pp. 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. Field geology i hometown gis, part 1 october 03, 2005 lab exercise 2. If you are in the petroleum geology business this is a musthave volume.
Gullfaks oil field location, discovery, and development background. The engineering geology field manual, in conjunction with the engineering geology office manual, forms the basis for the mutually beneficial exchange of ideas by reclamation geologists. Structural geology of the gullfaks field, northern north sea. 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. It is one of the most structurally complex oil fields in the north sea.
The reservoir is complex due to large number of faults and extreme permeability contrast ranging from several darcies in the tarbert to millidarcy in the cook. This is a quick reference to concepts, tools, formulas, and techniques on everything from economics and land leasing to wellsite and engineering methods. The ebook is now available for purchase as a pdf amazon kindle ebook or as a. This oil field reached peak production in 2001 at 180,000 barrels per day 29,000 m 3 d. This field has a quite complex geology which makes routine seismic interpretation a challenging task for understanding the reservoir properties such as lithology and fluid content. Ranked as a giant by world standards, gullfaks is one of the largest discoveries on the northwest european continental shelf. 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. The gullfaks ab and gullfaks c streams were commingled as of may 1, 2005. Gullfaks c sits 217 metres 712 ft below the waterline. Spe bergen 2005, gullfaks pressure in sg 1,0 sg kgm3 depth tvd pore pressure fracture. This monograph presents a unique combination of structural and tectonic modelling with applied petroleum geological problems. It was discovered in 1978, in block 3410, at a water depth of 230 meters.
One of the challenges is to distinguish between anomalies related to real geological features and to seismic. Focussing on the norwegian continental shelf and neighbouring areas, it includes discussion covering all scales from development of sedimentary basins, to formation of fractures and joints on a microscale and from exploration, to the exploitation of hydrocarbons. Read properties of fault populations in the gullfaks field, northern north sea, journal of structural geology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Pdf the use of dipmeter data to constrain the structural. The gullfaks field is located in the western flank of the northern north sea viking graben 175 km northwest of bergen, east of the statfjord field and south of the snorre field. 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. Seismic attribute maps provide a useful tool in interpreting faults, particularly those close to or below seismic resolution. Production from the constituent fields gullfaks blend ab and c, tordis, vigdis and visund is 150 kbd. Abstract the giant gullfaks main field comprises statfjord, cook and brent formations of early to middle jurassic. Installing the modules on gullfaks a, which lies in the northern part of the north sea. Without a doubt, this is ht case with this introductory structural geology work by fossen.
The new gullfaks blend is located 160km west of the sogne fjord, 20km southeast of statfjord and 7km southwest of the snorre platform. Statoil gullfaks this oil field lies in 220 metres of water in the northern north sea. Kimmeridgian shales total petroleum system of the north. The brent reserves in the western part of the field are currently being developed from the gullfaks a and b platforms, and the eastern part is being developed from a third platform, gullfaks c. Gullfaks is an oil and gas field in the norwegian sector of the north sea operated by equinor. Once in a while, an extraordinarily superior book appears in the midst of other good books on a subject. Gullfaks field based on sequence stratigraphic concepts. However, it is unclear how much the most advanced developments, such as subseismic fault and faultseal modeling, contribute to a better understanding of a field. However, the advances in seismic surveys and processing. The gullfaks field is located in block 3410 of the norwegian continental shelf ncs, which was norways firstever offshore license to be awarded to a domestic consortium comprising statoil now equinor, norsk hydro, and saga petroleum in. This oil field reached peak production in 2001 at 180,000.
The gullfaks area with neighbouring fields in the tampen region. Most outstanding, the book provides a balance between soft rock and hard rock, discusses the field s relevance to basic and applied applications, and. Structural and tectonic modelling and its application to. Gullfaks sor is a satellite to the main gullfaks field, developed with subsea production installations. This dissertation starts with the brief introduction of location of gullfaks field in chapter 1. Structural geology of the gullfaks field, northern north. The naming of the files is tricky purely numeric, so keep track of which is the roads and which is the elevation data. Permanent field installations limit the area where new marine streamer surveys can be acquired. Gullfaks main represents the main reservoir containing 78% of the total inplace oil volumes and 88% of the recoverable reserves. After wiley reverted the publishing rights, i decided to convert geology in the field into an ebook to make it available quickly and at a reasonable price. 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.
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. Ranked as a giant by world standards, gullfaks is one of the largest discoveries. The analyses have verified the general structure obtained by seismic interpretation. Properties of fault populations in the gullfaks field. These blocks were awarded in 19781995 and 1973 carveout 1998 respectively. Kimmeridgian shales total petroleum system of the north sea graben province by donald l. The production and exploration geologists best data base for saving time. The crude oil is stored in the concrete base of the platforms and loaded into tankers via two separate mooring buoys. Structural geology by haakon fossen cambridge core.
Characterization of fault zones in the gullfaks field for. The large amount of structural data available from the gullfaks field have been used to unravel the structural characteristics of the area. Associated gas mainly passes into the statpipe network. Geology in the field that continued to serve as the definitive guide to. Gullfaks a and c are fully independent processing platforms, with three separation stages. Gullfaks is a field in the tampen area in the northern part of the north sea. Fault linkage and graben stepovers in the canyonlands utah and the north sea viking graben, with implications for hydrocarbon migration and accumulation haakon fossen, richard a. Jan 01, 2005 the gullfaks oil field is located in the norwegian sector of the northern north sea. Gullfaks oil field project, north sea northern offshore. The drainage interpretations carried out by means of the repeated seismic datasets are in reasonable. The gullfaks field contains oil reserves on the order of 230 million standard m 3. Gullfaks represents the shallowest structural element of the tampen spur. Kimmeridgian shales total petroleum system of the north sea.
Most outstanding, the book provides a balance between soft rock and hard rock, discusses the fields relevance to basic and applied applications, and. Pdf the large amount of structural data available from the gullfaks field have been used to unravel the structural characteristics of the area. The operators depth grids and isochore maps were used to build a faps database. 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. The gullfaks satellites project includes the recovery of oil condensate from gullfaks. The present study is mainly concerned with data from the jurassic layers in the gullfaks field, and thus with the late jurassic rift phase. The use of dipmeter data to constrain the structural geology. Gullfaks is one of the major oil fields in the north sea and one of the largest oil producing fields on the norwegian continental shelf, fig. Dunlin group sequence stratigraphy in the northern north. Dip, relief, azimuth and amplitude maps are most useful. Water injection is the major drive mechanism, maintaining the reservoir pressure above the bubble point. The general geology of the area is given in the chapter 2, the basic theory of seismic inversion is highlighted in chapter 3, the methodology followed during the research is elaborated in. Discovered in 1969 by phillips petroleum company, it remains one of the most important oil fields in the north sea. Two structurally distinct subareas have been revealed a major domino system and an.
Make sure you have an adult helping you since youll be using the stove. Gullfaks c produces 250,000 barrels per day 40,000 m 3 d of oil. These include the preparation of geologic maps that show the areal distribution of geologic units selected for representation on the map. Gautier abstract the north sea graben of northwestern europe, world energy project province 4025, is entirely offshore within the territorial waters of denmark, germany, the netherlands, norway, and the united kingdom. Reservoir management of the gullfaks main field onepetro. After my father died in 2015 i was determined to revive his classic field manual which had gone out of print. Regional geology of the northern north sea and distribution of hydrocarbon bearing formations within the lower. 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. Wavefield dissection and imaging of marine multicomponent seismic data. The gullfaks area consists of a number of oil and gas fields located to the east of statfjord. Structural geology of the gullfaks field, northern north sea home. Ekofisk is an oil field in block 24 of the norwegian sector of the north sea about 320 km 200 mi southwest of stavanger.
Timelapse 4d seismic data have been used at gullfaks since 1995 and have contributed significantly to the reservoir management of the field. Analyses of 23 km of dipmeter data from 48 wells on the gullfaks field, northern north sea, have helped to constrain and understand the structural geology of the area. In 1962 he published manual of field geology, which soon became a classic. Reservoir description structural mapping of the gullfaks area is complicated due to relatively poor seismic data and complex structural geology. They also include the plotting of the orientation of such structural features as faults, joints.
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