2/7-19 R
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Generell informasjon
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Brønnhistorie
GeneralWell 2/7-19 R is a re-entry of well 2/7-19, which was drilled in 1980/81 by the semi-submersible Borgsten Dolphin. The well encountered gas in Early Cretaceous sandstones, but was suspended in February 1981 due to a BOP system that was not rated to allow a DST test to be performed. RFT tests measurements indicated a possible wellhead pressure of 11200 psi, while the BOP was rated to 10000 psi. A 7" liner was run to a depth of 4839 m and cemented, but not perforated. The purpose of the re-entry was to test 43 m of gross pay distributed in four sand lenses from 4712 to 4839 m. The DST test was designed such that it would be possible to keep the well for future production if flow rates were commercial.Operations and resultsWildcat well 2/7-19 was re-entered (2/7-19 R) with the semi-submersible installation Ross Isle on 15 January 1990.During drilling of the 2/7-19 well, only gas was encountered. The test in the re-entry showed that the reservoir rocks were tight, but a positive feature was that oil was encountered during testing. The test confirmed the earlier anticipated formation pressure of 860 to 895 bar.The well was permanently abandoned on 14 March 1990 as an oil appraisal.TestingOne DST test was performed from four sand lenses in the intervals 4712 - 4727 m, 4762 - 4783 m (Ula Formation), 4800 - 4818 m Ula/Bryne Formations), and 4830 - 4838 m (Bryne Formation). The total net pay in the perforated sections was 23 m. After acid treatment the well produced hydrocarbons at a rate of 34.8 Sm3 oil and 15631 Sm3 gas /d through an 11.91 mm choke. The CO2 content of the separator gas was 4.4%. The GOR was 449 Sm3/Sm3 but this figure is uncertain due to slugging of the well and poor rate measurements. The matrix/acid job performed was not effective. The stable shut-in temperature at 4628 m (gauge depth) was 169 deg C, while maximum recorded flowing temperature was 172 deg C. It was not established which of the four perforated sections that contributed to the flow. -
Palynologiske preparater i Sokkeldirektoratet
Palynologiske preparater i Sokkeldirektoratet Prøve dybdeDybde enhetPrøve typeLaboratorie4800.0[m]DCIKU4839.0[m]DCIKU4852.0[m]DCIKU4867.0[m]DCIKU -
Oljeprøver i Sokkeldirektoratet
Oljeprøver i Sokkeldirektoratet Test typeFlaske nummerTopp dyp
MD [m]Bunn dyp
MD [m]Væske typeTest tidspunktPrøver tilgjengeligDSTDST14711.604838.4016.02.1990 - 00:00YES -
Litostratigrafi
Litostratigrafi Topp Dyb [mMD RKB]Litostrat. enhet9515272984298430013024306631273127318534414052407842094209432544654583458345874690469048074837 -
Geokjemisk informasjon
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Borestrengtester (DST)
Borestrengtester (DST) Test nummerFra dybde MD
[m]Til dybde MD
[m]Reduksjonsventil størrelse
[mm]1.04711483812.0Borestrengtester (DST) Test nummerEndelig avstengningstrykk
[MPa]Endelig strømningstrykk
[MPa]Bunnhullstrykk
[MPa]Borehullstemperatur
[°C]1.02.700169Borestrengtester (DST) Test nummerOlje produksjon
[Sm3/dag]Gass produksjon
[Sm3/dag]Oljetetthet
[g/cm3]Gasstyngde rel. luftGOR
[m3/m3]1.03515631449 -
Boreslam
Boreslam Dybde MD [m]Egenvekt, slam [g/cm3]Viskositet, slam [mPa.s]Flytegrense [Pa]Type slamDato, måling3641.328.016.8WATER BASED12.03.199011061.325.06.7WATER BASED09.03.199011061.325.06.7WATER BASED12.03.199033992.0658.019.6OIL BASED28.02.199033991.8210.019.2WATER BASED02.03.199033991.8211.019.6WATER BASED05.03.199033991.8210.018.2WATER BASED05.03.199033991.8211.016.8WATER BASED05.03.199033991.8210.016.8WATER BASED06.03.199033991.8210.017.2WATER BASED07.03.199033991.688.012.9WATER BASED08.03.199033991.8211.020.6WATER BASED02.03.199045452.1061.014.4OIL BASED28.02.199045452.0453.09.6OIL BASED28.02.199045452.0958.013.9OIL BASED28.02.199045452.0658.019.6OIL BASED28.02.199047192.0452.010.5OIL BASED22.02.199047192.0451.010.5OIL BASED23.02.199048632.0443.012.0OIL BASED12.02.199048632.0448.012.9OIL BASED19.02.199048632.0533.010.1OIL BASED05.02.199048632.0654.017.2OIL BASED05.02.199048632.0552.012.4OIL BASED05.02.199048632.0450.010.5OIL BASED05.02.199048632.0449.013.4OIL BASED06.02.199048632.0442.010.1OIL BASED07.02.199048632.0451.013.4OIL BASED08.02.199048632.0445.014.4OIL BASED09.02.199048632.1046.012.9OIL BASED12.02.199048632.0450.014.4OIL BASED12.02.199048632.0443.012.0OIL BASED13.02.199048632.0443.012.0OIL BASED14.02.199048632.0148.08.6OIL BASED15.02.199048632.0450.014.4OIL BASED16.02.199048632.0449.013.4OIL BASED19.02.199048632.0451.014.8OIL BASED19.02.199048632.0451.011.0OIL BASED20.02.199048632.0450.010.5OIL BASED21.02.1990