7220/11-1
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Generell informasjon
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Brønnhistorie
GeneralWell 7220/11-1 was drilled on the Alta prospect on the southern part of the Loppa High in the Barents Sea. The primary objective was to test sandstones of the Triassic Kobbe Formation and Permian to Carboniferous carbonates of the Ørn Formation. The secondary objective was to test carbonates and sandstones of the Carboniferous Falk Formation.Operations and resultsWildcat well 7220/11-1 was spudded with the semi-submersible installation Island Innovator on 5th August 2014 and drilled to TD at 2251 m in the Late Carboniferous Ugle Formation. No significant problem was encountered in the operations. The well was drilled with seawater down to 588.4 m and with Aqua-Drill mud from 588.4 m to TD.Numerous shows, of variable quality, was described in thin sandstones in the upper part of the Triassic Snadd Formation (624 m, 727 - 737 m, 822 m, 845 - 9924 m, 1246 m, 1280 m, 1298 m, and 1329 - 1349 m). The well did not encounter reservoir quality in the primary Alta Kobbe Formation target. A 26 m thick Triassic conglomerate unit was encountered at 1897 m. This unit rests directly on carbonates of the Carboniferous Falk Formation. The Ørn Formation was not present in the well. The Triassic conglomerates and the Falk carbonates were found to be hydrocarbon bearing with a total column height of 57 m (11 m gas column over a 46 m oil leg). The gas/oil contact is interpreted to be at 1908.1 m. Organic geochemical analyses of the oil show an abundance of tricyclic terpanes combined with a light carbon isotopic composition, typical of the Barents region Triassic source rocks. The oil/water contact is interpreted to be at 1954 m. Below the Falk Formation the Ugle Formation had 122 m gross sandstones. These sandstones were described as clear translucent, occasionally yellowish-orange quartz (common moderate brown coating) with moderate brown to reddish brown argillaceous matrix. The grain size is mostly fine to medium, but up to coarse.The reservoir section was cored in four cores from 1904 m to 1977.5 m with 99 to 100% recovery. MDT fluid samples were taken at 1900.7 m (condensate), 1912.0 m (oil), 1919.5 m (oil), 1939.7 m (oil), 1986.8 m (water), and 1999.5 m (water).The well was permanently abandoned on 17 October 2014 as an oil and gas discovery.TestingThe well was perforated in two separate intervals in the Falk Formation (1934.8-1945.0 m) and the Triassic Conglomerates (1912.9-1921.4 m). While flowing from the lower perforations alone before acid stimulation, well productivity was low. After acid stimulation of the lower zone and perforation of the upper zone, a good productivity was achieved. The final flow rate was 520 Sm3/day oil and 48 600 Sm3/day gas through a 36/64 inch fixed choke; the GOR was 94 Sm3/Sm3, and the downhole temperature was 72.7 °C at 1935 m. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]600.002250.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11904.01928.0[m ]21928.01954.2[m ]31954.31964.0[m ]41964.01977.5[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]73.4Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDST1A1946.501937.00OIL02.10.2014 - 00:00YESDST1B1921.001913.00OIL05.10.2014 - 00:00YES -
Foringsrør og formasjonsstyrketester
Foringsrør og formasjonsstyrketester Type utforingUtforing diam.
[tommer]Utforing dybde
[m]Brønnbane diam.
[tommer]Brønnbane dyp
[m]LOT/FIT slam eqv.
[g/cm3]Type formasjonstestCONDUCTOR30486.036489.50.00SURF.COND.20588.426594.01.34FITPILOT HOLE594.09 7/8594.00.00INTERM.13 3/81196.017 1/21202.01.50FITINTERM.9 5/81764.112 1/41770.51.50FITLINER72049.88 1/22251.00.00 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.01935194514.32.01913192114.3Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.0422.046Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.051849000952.05304800090 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]CCL GR SBT VDL13371754GR GEOW7532238MRCH JAR GR PCOR17772219MRCH JAR TTRM DSL CN ZDL ORIT XM17522214MRCH JAR TTRM DSL FLEX MREX18692011MRCH JAR TTRM DSL FLEX MREX18902108MRCH JAR TTRM DSL STAR ORIT UXPL11961753MRCH JAR TTRM DSL STAR ORIT UXPL17622239MRCH JAR TTRM RLVP RCX GR13281340MWD - ATK MXT OTK SDTK CCN ORD Z10821770MWD - MXT OTK SDTK ZTK BCPM NBG5371202MWD - OTK BCPM418489MWD - OTK SDTK BCPM462592MWD - OTK SDTK CCN ORD BCPM II16942249SC PO SAT PQ IFA MS PC ADT GR18802210 -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet41841844744755655658058018521852189518981898192319232118 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4651.4016.0Water Based4721.032.0Water Based4721.2011.0Water Based4901.03120.0Water Based5391.2011.0Water Based5941.407.0Water Based5941.2020.0Water Based5941.0320.0Water Based5981.1915.0Water Based8691.2117.0Water Based12021.2019.0Water Based16921.2016.0Water Based17741.1421.0Water Based19281.1618.0Water Based20511.141.0Brine20511.1611.0Water Based -
Palynologiske preparater i Sokkeldirektoratet
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Tynnslip i Sokkeldirektoratet
Tynnslip i Sokkeldirektoratet DybdeEnhet1906.30[m ]1907.60[m ]1915.82[m ]1918.28[m ]1923.01[m ]1924.25[m ]1930.80[m ]1935.72[m ]1936.60[m ]1941.75[m ]1946.55[m ]1949.27[m ]1950.77[m ]1951.35[m ]1953.55[m ]1954.57[m ]1959.10[m ]1960.20[m ]1963.83[m ]1965.20[m ]1971.72[m ]1973.35[m ]1974.18[m ]1976.89[m ]1977.35[m ]1988.00[m ]1902.00[m ]1977.00[m ]1983.00[m ]1989.00[m ]1995.00[m ]1998.00[m ]2001.00[m ]2004.00[m ]2007.00[m ]2013.00[m ]2016.00[m ]2019.00[m ]2022.00[m ]2025.00[m ]2031.00[m ]2034.00[m ]2037.00[m ]2043.00[m ]2049.00[m ]2055.00[m ]2061.00[m ]2067.00[m ]2073.00[m ]2076.00[m ]2079.00[m ]2085.00[m ]2091.00[m ]2097.00[m ]2100.00[m ]2103.00[m ]2106.00[m ]2109.00[m ]2112.00[m ]2118.00[m ]