Kimmeridgian shales total petroleum system of the north sea. The lunde and statfjord formations are deposited on large alluvial plain during thermal subsidence phase of permotriassic rifting phase of northern north sea. Snorre field display marked variations in their heavy mineral assemblages. Mineral 1 is harder or softer than your fingernail. The structural evolution of the snorre field and surrounding areas. This was done in order to make an estimate of average reservoir and well performance at an early stage in the delineation and evaluation of the field, while development planning was still underway. The snorre field is located in the tampen spur area of the norwegian north sea. The subject of field geology has been divided into the four broad topics of geology, geochemistry, geophysics and geofluids to facilitate explanation of the topics. Reservoir simulation of the snorre field springer for. Department of geology and geophysics, university of missourirolla, rolla. Correlation of triassic to lower jurassic sequences, snorre. Reservoir characterization of triassic and jurassic. Snorre oil and gas field expansion project offshore technology.
The weather permitting, several weekend field exercises provide practical experience in preparation for field geology ii 12. Snorre field is estimated to contain 276 million standard cubic metres of oil, including 63 million standard cubic metres that is. Geological society, london, petroleum geology conference series, 4, 1159 1166. These specialties are known as branches of geology, and have specific titles. These include the preparation of geologic maps that show the areal distribution of geologic units selected for representation on the map. The role of the cimmerian unconformity early cretaceous in the kaolinitization and related reservoir. Introduction to geological mapping lecture 1 3 field geology when rocks and rock materials are investigated in their natural environment and in their natural relations to one another, the study is called field geology. Residual oil in the cap rocks overlying the snorre field must have been emplaced directly from the reservoir by bulkflow processes. The snorre field is located within the tampen spur on the crest of an uplifted, rotated. The snorre, statfjord and gullfaks oilfields and the habitat of hydrocarbons on the tampen spur, offshore norway. Fig 4 35111 348a1 h 3481 347r1 h 34712 3472 3489 s 3471 3483 a 3447 3446 3424 3612 3531 61 61 2 4.
Nevertheless, such study has potential application to the modeling of brazilian reservoirs with similar composition, depositional and burial evolution. Experienced geologists will find useful reminders and new procedures and special tech niques, while less experienced engineering geologists and. The snorre field is located within the tampen spur on the crest of an uplifted, rotated and croded fault block which flanks the western margin of the viking graben. Correlation of triassic to lower jurassic sequences, snorre field. The snorre field, in the norwegian north sea, contains a 300 m oil column and is characterized by high pressures. Structural geology of the gullfaks field, northern north sea.
These blocks were awarded in 19781995 and 1973 carveout 1998 respectively. Field geology i earth, atmospheric, and planetary sciences. Two sequences of fluviatile sediments from snorre oil field are investigated by the smnd isotopic method. This field is a structuralstratigraphic trap formed by westward tilting and erosion of a major fault block. 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. The snorre field is located on the tampen spur, northern viking graben between 61 n. The snorre field, located on the tampen spur in the west of the viking graben, presents a 300 m oil column in triassic and. Viking grabens, with names and locations of oil and gas fields.
Two parts of the field are in production, sleipner west proven in 1974, and sleipner east 1981. This was done in order to make an estimate of average reservoir and well performance at an early stage in the delineation and evaluation of the. The hydrodynamics of the snorre field area, offshore norway. The main aim of this unit is to introduce you to the basic procedures of carrying out a field geological mapping exercise and how to present the obtained field information data in a formal geologic report. The naming of the files is tricky purely numeric, so keep track of which is the roads and which is the elevation data. As we mentioned, there are many varieties of geology. Quality evolution in triassic sandstones of the snorre field, north sea chapter pdf.
The lunde formation has smnd provenance ages mainly in the range 1500 to 1700 ma, which is not diagnostic of a specific. The tampen spur is a structural high and consists of rotated fault blocks. Experienced geologists will find useful reminders, new procedures, and special techniques, while less experienced engineering geologists and those from other disciplines can use the manual to expand their. The snorre field was chosen considering the availability of petrographic. The stavanger conference giant oil and gas fields of the decade. Reservoir units are the statfjord formation late rhaetian sinemurian and the continental redbed sequences of the hegre group scythianrhaetian. Evaluation of the hydrocarbon distribution was based on data from hydrocarbon shows encountered during drilling and organic geochemical data from canned cuttings samples, 27 dst oils and rock samples from two wells. Pdf based on detailed analyses of seismic and well data, the statfjord field, northern north. Recognition of caprock leakage in the snorre field, norwegian.
The reservoir has complex geology due to presence of several large fault blocks and is grouped into various zones containing sandstones of the statfjord and lunde formations. A section of bone is described from a well core retrieved from a depth of 2615 m md measured depth rkb. The snorre field see box is a major north sea oil field that is expected to benefit from frequent surveys with accurate survey repetition. The results illustrate distinctly different source areas for the upper triassic upper member of the lunde formation and for the lower jurassic statfjord formation. Pdf the role of the cimmerian unconformity early cretaceous. The original oil in place is estimated to be 26 msm3 163 mbbl. They also include the plotting of the orientation of such structural features as faults, joints, cleavage, small folds. Geological engineering field camp exercises geological society of america 2002 rocky mountain section annual meeting, cedar city, utah may 10, 2002 santi, p. Geochemical modeling of diagenetic reactions in snorre field. Lahee 1961, however, emphasizes that although field geology is based on observation, many conclusions are predicated on inferences. Scientific studies and projections of future world energy demand indicate that although alternativeenergy fuel sources must be actively pursued and developed. The ekofisk field is a central graben, northsouth trending anticline 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.
The snorre field is located on the tampen spur, northern viking graben between 61n and 62n. The snorre structure, one of the largest fault blocks in the east shetland basin, extends across block 347 into block 344. The role of the cimmerian unconformity early cretaceous in. Jurassic reservoirs in snorre field are found in tilted fault blocks that expose 1,000. Although hydraulic and diagenetic processes have played some part in generating these variations, major changes in the nature of the source material can be detected on the basis of heavy mineral ratio and varietal data. The field extends over an area of approximately 20 km2. The snorre field will undergo a twophase development. They propose that during the early pleistocene sensu ics 20, large volumes of sand were ejected from the paleocene through the eoceneoligocene hordaland group, and deposited both as extrusive sand on the pleistocene seafloor and as intrusive sand within the. Cret \\\ figure 3 geological crosssection across the snorre field after karlsson, 1986 marine and petroleum geology, 1993, vol 10, february 43 caprock leakage in the snorre field. Samariumneodymium isotope stratigraphy of the lunde and. Main structural elements are large, westerly tilted fault blocks. The structural evolution of the snorre field and surrounding. In 1985 he published a revised manual geology in the field that continued to serve as the definitive guide to geological mapping. The snorre field, located on the tampen spur in the west of the viking graben, presents a 300 m oil column in triassic and lower jurassic reservoirs, and it is characterized by high pressures.
In 1985 he published a revised manual geology in the field that continued to. A stochastic procedure was developed to construct threedimensional computer models of selected parts of the field. The engineering geology field manual forms the basis for the mutually beneficial exchange of ideas by geologists and engineers. After my father died in 2015 i was determined to revive his classic field manual which had gone out of print. Evaluation of the hydrocarbon distribution was based on data from hydrocarbon shows encountered during drilling and organic geochemical data from canned cuttings samples, 27. Pdf a tectonostratigraphic framework for the statfjord field. The field s future economy relies on an effective ior strategy.
Snorre is a large oil and gas field located in the tampen area of the northern north sea, which will benefit from renewed investment over the next decade. The snorre field is located in the northern north sea and belongs to the prolific hydrocarbon province on the western margin of the viking graben, which contains the brent, statfjord, and gullfaks fields. The reservoir is highly heterogeneous with varying reservoir quality i. Snorre is a thick, heavily faulted, eroded and heterogeneous fluvial reservoir with a complex production history and with a large ior potential. Although the occurrence of a fracture zone in the cap rock may lead to locally high residual oil concentrations, there is no evidence that major fracture systems are responsible for emplacing the oil found in the. Reservoir units are the statfjord formation late rhaetian sinemurian and the continental redbed sequences of. The snorre fault block includes the snorre field, tordis field and the vigdis field oil discoveries.
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. There is so much to know about our home planet that most geologists become specialists in one area. It is stressed, however, that these topics are seldom approached in isolation and modern geological surveying utilizes components of all these subdisciplines. The caprock is formed by thick shale of cretaceous and palaeocene age. Discussion on late cenozoic geological evolution of the. Reservoir simulation studies of the snorre field were initiated in 1985 for the purpose of formulating an optimum reservoir development strategy and predicting reservoir recovery and performance. The ebook is now available for purchase as a pdf amazon kindle ebook or as a.
The field produces natural gas and light oil condensates from sandstone structures about 2,500 metres. Field geology i hometown gis, part 1 october 03, 2005 lab exercise 2. He states that the ability to infer and infer correctly is the goal of training in field geology p. For example, a mineralogist studies minerals while a seismologist monitors earthquakes to help protect people and. Both reservoirs are truncated by the kimmerian unconformity and overlain by jurassic and cretaceous shales. The course provides students with 1 an introduction to the geologic history of western north america, with particular emphasis on our field camp location and 2 an introduction to both digital and traditional techniques of geological field study. Field geology encyclopedia of life support systems. It has two main reservoirsthe triassic lunde formation and the triassicjurassic statfjord formation. Introduction to geological mapping is a third year earth science study unit offered by the department of geology, university of nairobi.
Role of cimmerian unconformity and kaolinitization, snorre field 363. In 1962 he published manual of field geology, which soon became a classic. The fields future economy relies on an effective ior strategy. The knarr field is located in the northern norwegian north sea, beyond the brent group delta fairway. Snorre a, a tension leg platform tlp that started production in 1992, and the semisubmersible platform snorre b which started production in 2001. Faulty geology halts project stratigraphic studies by the npd in the wake of an oil leak on tordis have shown that the utsira formation is not present where an injection well was drilled for this north sea field. The sleipner gas field is a natural gas field in the block 159 of the north sea, about 250 kilometres 160 mi west of stavanger, norway.
Minerals hardness 1gypsum, 2halite mineral 1 is harder or softer than a penny. The snorre field is located on the tampen spur area, northwest of viking graben in northern north sea. The results formed the basis for the commerciality evaluation and the field development and operating plan. Marine and petroleum geology 28 2011 561e577 this paper is on two largescale well log montage displays figs. Quality evolution in triassic sandstones of the snorre field, north sea j. Organicrich upper jurassic shales constitute the major source rock.
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