Strontium isotopic signatures of oil-field waters: Applications for reservoir characterization

Barnaby, Roger J.; Oetting, Gregg C.; Gao, Guoqiu

doi:10.1306/07130404002

Cited by 34 publications

(10 citation statements)

References 70 publications

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“…A third type of geothermal fluid flows upward from very deep crustal and/or mantle sources along faults and/or fractured bedrock and may be related to one or a combination of active tectonism, metamorphism, deep-seated magmatism or asthenospheric processes ( The isotopic composition of moderate-to high-temperature geothermal fluids is strongly controlled by interaction with the bedrock through which it passes (Fritz et al 1987;Clark and Fritz 1997;Barnaby et al 2004;Faure and Mensing 2005;Sharp 2007). In order to test whether this occurred in the fluid(s) from which the Rincon opal and calcite beds precipitated, the 87 Sr/ 86 Sr ratio of Rincon opal is compared to that of the local bedrock (Figs.…”

Section: Isotope Geochemistry and Potential Fluid Sources For The Rinmentioning

confidence: 99%

Mixed Geothermal and Shallow Meteoric Origin of Opal and Calcite Beds In Pliocene-Lower Pleistocene Axial-Fluvial Strata, Southern Rio Grande Rift, Rincon Hills, New Mexico, U.S.A

Mack

Jones

Tabor

et al. 2012

Journal of Sedimentary Research

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Exposed in upper Pliocene fluvial strata in the eastern Rincon Hills and adjacent Jornada del Muerto Basin, southern Rio Grande rift, New Mexico, USA, are five laterally continuous beds 0.2 to 1.0 m thick of opal-CT, which straddle the East Rincon Hills normal fault. Four of these opal beds change basinward over , 1 km or less to white, friable, lithofeldspathic sand with opal glaebules, and then to microcrystalline calcite. The opal and calcite generally replaced fine sand at shallow depths, although two beds locally precipitated from standing water. 87 Sr/ 86 Sr values (0.71301 to 0.71724) of the opal beds are consistent with precipitation from an advecting, high-temperature geothermal fluid that flowed through bedrock and/or from a hightemperature geothermal fluid derived from a deep-crustal source. Carbon and oxygen isotopic values (d 13 C PDB = 27.1 to 20.6; d 18 O PDB = 29.1 to 25.6) of the calcite beds lie between and overlap those of Paleozoic carbonate and Pliocene paleosol calcite, suggesting precipitation from a mixture of a high-temperature geothermal fluid that interacted with Paleozoic carbonates and shallow, meteoric groundwater, for which paleosol calcite is a proxy. The geothermal fluids are interpreted to have upwelled along the East Rincon Hills fault, flowed laterally at or just below the surface, and precipitated opal in response to rapid cooling and evaporation. Downflow precipitation of opal glaebules occurred as a result of decreasing silica concentrations and perhaps by mixing with shallow, meteoric groundwater, from which calcite precipitated, probably by CO 2 degassing.

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Section: Isotope Geochemistry and Potential Fluid Sources For The Rinmentioning

confidence: 99%

Mixed Geothermal and Shallow Meteoric Origin of Opal and Calcite Beds In Pliocene-Lower Pleistocene Axial-Fluvial Strata, Southern Rio Grande Rift, Rincon Hills, New Mexico, U.S.A

Mack

Jones

Tabor

et al. 2012

Journal of Sedimentary Research

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“…Groundwaters inherit the isotopic ratio of dissolving carbonate and siliciclastic minerals in the subsurface (Banner et al, 1994;Barnaby et al, 2004). Dissolution and reprecipitation of carbonate does not affect 87 Sr/ 86 Sr values, and coprecipitated dolomite and calcite yield identical 87 Sr/ 86 Sr, and therefore do not need to be separated for analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Sampling of stream waters in the presumed source area catchment in association with the main source carbonates should represent the water chemistry of the ancient source area drainage. Only the input of volcanic ash, discharge of deeper groundwaters fl owing through rocks not found in the catchment or shallow subsurface, or a large input of eolian carbonate could affect a change in the basinal lake Sr isotopic values (Palmer and Edmond, 1992;Barnaby et al, 2004;Faure and Mensing, 2005). In this study, we use Sr isotopes for the fi rst time to correlate between the projected source area and basinal nonmarine carbonate rocks of the PaleoceneEocene Flagstaff Formation in central Utah.…”

Section: Introductionmentioning

confidence: 99%

Watershed reconstruction of a Paleocene-Eocene lake basin using Sr isotopes in carbonate rocks

Gierlowski‐Kordesch

Jacobson

Blum

et al. 2008

Geological Society of America Bulletin

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Provenance studies have used Sr isotopes ( 87 Sr/ 86 Sr) of silicate source rocks as a link to their eroded basinal equivalents. This technique, however, cannot identify the proportional inputs from different watersheds or defi ne more precisely sedimentation events due to tectonic or climatic change. Erosion of carbonate rocks dominates the Sr input within basin drainage and potentially can be used through 87 Sr/ 86 Sr ratios to reconstruct paleohydrology of the entire basin and trace watershed inputs and depositional patterns in continental basins. The Sr isotopic ratios from waters of the source area, allowing for the mixing of shallow groundwater and surface water along the transport path, are homogenized in the basinal carbonate sediments. Mineralogy and diagenesis of carbonate rocks generally do not affect the Sr isotopic signal in a near-surface system lacking external infl uence by volcanism, eolian dust, or deep geothermal waters. The 87 Sr/ 86 Sr ratios from the source area are directly comparable to those in the receiving continental basin.The Sr isotopic signal of the PaleoceneEocene Flagstaff Formation (central Utah), a carbonate lake deposit in a foreland basin, is compared to that of projected source waters draining its thrust front, the Sevier fold-thrust belt. Freshwater carbonates compose a large portion of the lowermost Ferron Mountain and uppermost Musinia Peak Members of the formation, whereas gypsum and carbonates predominate in the middle Cove Mountain Member. Previous research had attributed gypsum deposition to the deposition of the middle Cove Mountain Member to either climatic change or unroofing of diapirs of Jurassic gypsiferous carbonates. To examine more closely the infl uence of climate versus tectonics on Flagstaff sedimentation as well as the effi cacy of provenance studies using carbonates, we collected rock samples from the three members of the formation on the Wasatch Plateau of central Utah in addition to sampling stream water associated with Pennsylvanian-Permian and Jurassic carbonate terrains from the nearby thrust front.The 87 Sr/ 86 Sr ratios in carbonates and gyprock belonging to the Flagstaff Formation remained unchanged during deposition, the average Sr isotope composition of the Flagstaff rocks being identical to that of sampled waters draining the projected provenance area. There was little change in source rock weathering as the thrust front evolved. Deposition of gypsum occurred in the basinal lake only during the deposition of the middle Cove Mountain Member, despite its constant exposure in the drainage area, suggesting a changing balance of tectonic and climatic controls during lake sedimentation. The 87 Sr/ 86 Sr isotopic studies targeting carbonate rocks and their presumed source waters are a simple but accurate method for reconstructing the paleohydrology of lake basins.

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“…Possible production related applications of organic reservoir geochemistry are production allocation in commingled wells, identification of production problems due to leaky tubing strings or leaks behind casing, evaluation of vertical and lateral hydrocarbon continuity and identification of untapped compartments (Kauffman et al, 1997;Nicolle et al, 1997;Milkov et al, 2007). Although the inorganic literature is more scarce, similar documentation for aqueous heterogeneities is shown from strontium isotopic analysis of residual salt and formation water samples (Smalley and England, 1992;Stølum et al, 1993;Mearns and McBride, 1999;Barnaby et al, 2004). Monitoring of produced water chemistry may thus reveal drainage patterns prior to injection water break-through.…”

Section: Introductionmentioning

confidence: 98%

Water flooding of the Oseberg Øst oil field, Norwegian North Sea: Application of formation water chemistry and isotopic composition for production monitoring

Munz

Johansen

Huseby

et al. 2010

Marine and Petroleum Geology

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Strontium isotopic signatures of oil-field waters: Applications for reservoir characterization

Cited by 34 publications

References 70 publications

Mixed Geothermal and Shallow Meteoric Origin of Opal and Calcite Beds In Pliocene-Lower Pleistocene Axial-Fluvial Strata, Southern Rio Grande Rift, Rincon Hills, New Mexico, U.S.A

Mixed Geothermal and Shallow Meteoric Origin of Opal and Calcite Beds In Pliocene-Lower Pleistocene Axial-Fluvial Strata, Southern Rio Grande Rift, Rincon Hills, New Mexico, U.S.A

Watershed reconstruction of a Paleocene-Eocene lake basin using Sr isotopes in carbonate rocks

Water flooding of the Oseberg Øst oil field, Norwegian North Sea: Application of formation water chemistry and isotopic composition for production monitoring

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