7220/11-4
Eksport: PDF
-
Generell informasjon
-
Brønnhistorie
GeneralWell 7220/11-4 was drilled to appraise the Alta discovery on the southern Loppa High in the Barents Sea. The primary objective was to delineate the eastern extent of the Alta discovery and prove the presence of hydrocarbon columns and fluid contacts similar to those established in the discovery well.Operations and resultsAppraisal well 7220/11-4 was spudded with the semi-submersible installation Leiv Eiriksson on 10 May 2017 and drilled to TD at 2282 m in the Carboniferous Ugle Formation. Operations proceeded without significant problems. The well was drilled with seawater and sweeps down to 471 m, with KCl/Polymer/GEM mud from 471 to 648 m and with Performadril mud with 3.0 – 3.6% glycol from 648 m to TD.The top of the reservoir was encountered at 1903 m. The well encountered a gross hydrocarbon column of 46.3 m, comprising 1.6 m of gas and 44.7 m of oil in a sequence of Permian-Triassic clastic carbonate sediments, conglomerates and breccias. The gas-oil contact (GOC) was found at 1904.6 m and the free-water level (FWL) at 1949.3 m . The pressure data confirmed similar fluid contacts and gradients to those observed in the previous wells drilled on the Alta discovery, suggesting good communication across the large Alta structure.Above the oil-bearing reservoir there were oil shows in the Snadd Formation at 620 m, 860 – 930 m, and 1080 – 1288 m. These were described with direct, cut and residue fluorescence. The strongest shows, at 620 m, were associated with high gas levels between 600 and 650 m. Below the oil reservoir oil shows were described down to 2061 m.Seven cores were cut in the interval 1904 to 1994 m. Cores 1 – 5 were cut in the 8 ½" section, while cores 6 and 7 were cut in the 6" section. MDT fluid samples were taken in the 8 ½" section at 1903.2 m (gas), 1912.6 m (oil), 1920.52 m (oil), and 1934.71 m (oil). One XPT water sample was taken in the 6"section at 1988.49.The well was permanently abandoned on 17 July 2017 as an oil and gas appraisal.TestingA DST was performed in the oil zone, the perforated interval was from 1923 to 1936.3 m in the oil zone. In the main flow the test produced 960 sm3 oil and 93800 Sm3 gas /day through a 56/64" choke. The GOR was 97 Sm3/Sm3, the oil density was 0.825 g/cm3 and the gas gravity was 0.706 (air = 1). Measured CO2 and H2S was up to 3% and 1.4 ppm, respectively. The static formation temperature estimated from Metrol Prolog test data is 71 °C at 1939.3 m. -
Borekaks i Sokkeldirektoratet
Borekaks i Sokkeldirektoratet Borekaks tilgjengelig for prøvetaking?YESBorekaks i Sokkeldirektoratet Borekaksprøve, topp dybde [m]Borekaksprøve, bunn dybde [m]500.002282.00 -
Borekjerner i Sokkeldirektoratet
Borekjerner i Sokkeldirektoratet Kjerneprøve nummerKjerneprøve - topp dybdeKjerneprøve - bunn dybdeKjerneprøve dybde - enhet11904.01914.7[m ]21915.71934.0[m ]31934.01941.8[m ]41942.01960.2[m ]51960.21970.4[m ]61972.61990.8[m ]71990.61991.8[m ]Borekjerner i Sokkeldirektoratet Total kjerneprøve lengde [m]84.7Borekjerner i Sokkeldirektoratet Kjerner tilgjengelig for prøvetaking?YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet427427500500564564589589184218421874188619031956195620152233 -
Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.01923193622.2Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.0Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.0960938000.8250.70697 -
Logger
Logger Type loggTopp dyp for logg [m]Bunn dyp for logg [m]ADT HRLA GR JAR18231969FMI PPC MSIP GR JAR4251970FMI PPC MSIP GR JAR19682264MSCT GR18361903MSCT GR19762118MSCT GR19832246MWD - OTII BCPM427669MWD - OTII LT BCPMII21492282MWD - OTII ST LT BCPMII19942149MWD - ZT RG OT BCPMII18301904MWD - ZT RG OT BCPMII19701970MWD - ZT RG OTII BCPM LT ST6691830NEXT XMR GR JAR18231961PQ HY PO SRP IFA MS PC JAR19882101PQ HY PO SRP PQ IFA MS PC JAR19021968UBI ADT HRLA PEX HNGS GR JAR19682254UBI PEX GPIT PPC GR JAR18231959UIB GPIT PPC GR JAR19672265USIT CBL12501964VSI GR4362260VSI GR4571965XPT NEXT CMR GR JAR19682251 -
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 formasjonstestCONDUCTOR30493.036493.00.00SURF.COND.20657.426664.01.30FITINTERM.9 5/81823.812 1/41830.01.62LOTLINER71968.68 1/21977.41.35FITOPEN HOLE2282.062282.00.00 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling4261.0545.0SWEEPS4531.5022.0KCL/Gem4711.0545.0SWEEPS4931.5022.0KCl/Polymer/GEM4931.3515.0KCl/Polymer/GEM6201.179.0KCl/Gem/Polymer6201.3617.0KCl/Polymer/GEM6481.3919.0KCl/Polymer/GEM6581.1719.0PerformaDril6641.1719.0Performadril6641.3919.0KCl/Polymer/GEM6691.1719.0Performadril8601.1819.0Performadril10181.1719.0Performadril11001.1819.0Performadril12701.2019.0Performadril13501.1819.0Performadril14521.179.0KCl/Gem/Polymer14521.1410.0KCl/Gem/Polymer14751.2019.0Performadril15701.2120.0Performadril17881.1410.0KCl/Gem/Polymer17941.2019.0Performadril18301.1420.0Performadril18301.2019.0Performadril18351.1421.0Performadril22821.1411.0KCl/Gem/Polymer22821.131.0KCl