..., the Euclidian multidimensional distance and dispersion of the log data to the tabulated evaporite log coordinates were taken as a probabilistic quality indicator. Finally, due to some possible lithology mixtures (mainly Halite and Anhydrite), a few lithologies were reallocated, subdivided (Sylvite split per GR...

... workflow well logging seismic model spwla-2024-0062 objective application brazil th annual logging symposium drilling data acquisition real time system spwla 65 sensitivity anhydrite logging while drilling drilling measurement intercalation detection baker hughe intra-salt intercalation...

.... correlation Weight Fraction log porosity log analysis Abu Dhabi porosity mineral model improvement spectroscopy Crossplot well logging spectroscopy data jurassic carbonate reservoir Symposium spwla 58 lithology interpretation Upstream Oil & Gas anhydrite dolomite interpretation...

... image log anhydrite supratidal facies argillaceous dolomite porosity Symposium borehole image log spwla 58 evaporite complex carbonate platform architecture SPWLA 58th Annual Logging Symposium, June 17-21, 2017 FACIES MODELING OF COMPLEX CARBONATE PLATFORM ARCHITECTURE IDENTIFIED FROM...

... of approximately 0.10 in., microresistivity imaging tools can detect thin organic-rich beds; however resistivity alone cannot be used to accurately distinguish between an organic-rich bed and other resistive beds such as anhydrite. Published literature suggests algal blooms associated with kukersite deposition...

..., commonly associated with a variable content of anhydrite and episodic presence of minor siliciclastics. The anhydrite content, if improperly accounted for, negatively impacts the well log interpretation and ultimately affects the reservoir production and development plans. Anhydrite layers thicker than...

... the analyzed sample set. Cores B and C showed more variability with both limestones and dolomite dominant. Other significant constituents of the samples were anhydrite and the minor presence of siliciclastics (QIFM). These three data sets together allow us to examine and compare the bulk Khuff C Member...

... is significantly improved with the addition of nuclear spectroscopy logs. Nuclear capture spectroscopy data indicate that the sandstone formations contain both calcite cement and disseminated anhydrite. An accurate understanding of lithology is critical for porosity estimation and is particularly important...

... Kurrachine Dolomite Formation at the Ash Shaer gasfield, comprises repeated sequences of mudrocks, dolomitised carbonate mudstone and wackestone, peritidal limestones, subaqueous anhydrite and halite. These were deposited in a restricted basin that was intermittently connected to the Neo-Tethys Ocean. Almost...

... quartz, carbonates, anhydrite, and illite. Anhydrite nodules can impart significant heterogeneity in mineralogy and porosity. Because of these factors, determination of fundamental reservoir quality parameters using the typical triple- or quadcombo wireline log suites can be challenging. Measurements...

... It has long been thought that the anhydrites present in exploration wells drilled offshore Angola adjacent to fault planes in the Pinda Formation reservoir were a direct result of burial diagenesis. Anhydrites can reduce the porosity of a good-quality reservoir as much as 10%, minimizing...

..., and dielectrics. Lithology and porosity evaluation in the presence of anhydrite or other heavy minerals requires the use of neutron capture spectroscopy logs. A comprehensive and accurate petrophysical evaluation of carbonates requires an easy-to-implement workflow to enable rapid and reliable integration...

... carbonate samples from different wells in a large Saudi Arabia oil field were selected. After completion of conventional core analysis in the laboratory, the samples were crushed into powders for mineralogy and elemental chemistry analyses. Sub-sample sets of calcite, dolomite, and anhydrite were obtained...

... analysis dalpari anticline structure structural geology imaging tool Reservoir Characterization Upstream Oil & Gas Thickness anhydrite Symposium Kalhur member Iran central oil field company pabdeh formation spwla 47 asmari formation borehole Sarvak formation image log SPWLA 47th...

... Significant oil and gas reserves in the U.A.E., Qatar, and elsewhere occur in carbonate formations containing anhydrite and quartz disseminated within calcite and dolomite reservoirs. Accurate evaluation of mineralogy in these complex carbonates, while cr log analysis elemental...

... regardless of tool orientation. After the initial dual density acquisition was performed it became apparent that other relevant information presented itself. The Karachaganak reservoir sections have some complicated porosity distribution, most notably; dolomitized sections with anhydrite plugging...

... Characterization well logging information Upstream Oil & Gas basin horst oil fractured reservoir case history structural geology anhydrite productivity log analysis Egypt porosity carbonate fracture anisotropy Gulf spwla 41 Symposium Nullipore permeability Miocene reservoir SPWLA 41...

... carbon-oxygen logging tools offer a reduction of logging time, while providing the data needed for reservoir evaluation in difficult environments. Upstream Oil & Gas borehole salinity fraction detector anhydrite dolomite determination spectra interpretation well logging information...

... program and checked against petrophysical core data, petrographic data provided by core description, and mineraolgical data based on microscopy and X-ray analyses. Principal minerals were calcite, dolomite, anhydrite, and halite with occasionally significant amounts of potassium salts, pyrite, clay...

... Intelligence interpretation process CCA environmental correction program well logging borehole environment porosity Symposium calcium calcite chlorine equation borehole vector sensitivity coefficient log analysis information anhydrite vector interpretation interpretation model SPWLA...