... and interpretation of these phenomena are discussed in the study. Looking to the reservoir in the relatively fresh state, a few minutes after drilling with an understanding of the logging environment provides a unique opportunity to obtain precise formation evaluation and insight into reservoir behavior when...

... by achieving a complete open hole formation evaluation and then migrating to case hole data acquisition and petrophysical assessment while benchmarking against open hole results. Low and variable formation water salinity, complex mineralogy's affecting resistivity and radioactive minerals, are common...

... for formation evaluation, but a limitation of this method, is the poor depth of investigation of the image data, constraining accurate petrophysical parameter computation. Conversely, in the absence of cores, image data can help explain encountered structural and sedimentological features. Against thin beds...

..., integrating the mud log and rock extract data has a potential to provide a robust formation evaluation and OWC identification in real time. A low extract yield zone with high asphaltene content and significantly high Wh to Bh ratio is indicative of a non-producible residual oil zone or water leg. Ghneej et...

..., or bed thickness/vertical resolution, or account for other single environmental effect like anisotropy. Later, other software tried to solve for 2-dimensional effects, and dip. They were slow, cumbersome, and limited in scope. Abstract Accurate formation evaluation relies critically, among other...

... of the most critical missions in formation evaluation. The complex mineralogy and low porosity in unconventional reservoirs result in little variations of resistivities from oil zones to water zones. The uncertainties in fluid typing lower the efficiency in finding the sweet zone. In conventional reservoirs...

... hyperparameter porosity coefficient hyperparameter formation evaluation rnn model society of petroleum engineers Introduction Results and Discussion The collected dataset of the 25 wells contains 8 independent variables (7 predictors and 1 target) which was divided by the ratio of 6/4 to train...

... of this writing. Notwithstanding this artificial invasion profile, it is assumed that deep resistivity in association with porosity from the PNC tools can be still be used to provide a reasonable estimate of the uninvaded zone saturation. The formation evaluation in the case study was performed in a series...

... background on electrical logs response and petrophysical models in these types of environments. In wildcat conditions, the lack of formation properties knowledge is detrimental to achieve a representative formation evaluation and reservoir potential understanding. While this is true even in relatively known...

... Formation Fluid radioactive source Upstream Oil & Gas polarization horn formation evaluation LWD invasion reservoir caliper borehole condition borehole society of petroleum engineers Introduction Historically, the instrumentation necessary to obtain log data has been restricted...

... and the theoretical solution, the next step is to establish a workflow for real practice. Several factors are considered in generating the workflow that includes formation evaluation, well placement, rig time, operational risk, etc. NMR Theory Abstract Reservoir A is an Upper Jurassic reservoir in offshore...

... Abstract In new wells with hole stability problems, which require to be cased and cemented immediately, and in old wells without a complete or reliable log dataset, a formation evaluation by means of quantitative open-hole (OH) log interpretation is not possible. Cased-hole (CH) logging can...

... image data, elemental spectroscopy, azimuthal dipole sonic data and formation pressure measurements/samples. The formation evaluation program involved careful analysis and integration of this data to decide at first on formation sampling points and then subsequently testing zones. This approach...

... insight to practical application of advanced formation evaluation (FE) technologies. To address the challenges of lithological and horizontal stress heterogeneity of unconventional reservoirs and to optimize multi-stage completions, a combination of three primary categories of reservoir characteristics...

... formation evaluation well placement log analysis static magnetic field NMR completion design well logging ICD completion design magnetic field conventional log reservoir integration permeability porosity identification core data case study resistivity magnetic resonance Introduction...

... Abstract Accurate formation evaluation relies heavily on the quantification of rock matrix constituents. Rock mineralogy identification is commonly based on wireline spectroscopy measurements. Logging while drilling (LWD) techniques traditionally rely on density and neutron data to derive...

... rocks. The technology enables this goal by providing advanced formation evaluation and characterization. The objective was to drill a 3000-ft horizontal drain, targeting two stepped down porous units with a net thickness ranging from 6 to 9 ft, a porosity of 3 to 20 %, and a permeability range of 4...

... in appraisal wells when knowledge of the pressure regimes in the different formations in the field is still incomplete. Several logging services are available for acquiring formation information through casing. This capability can provide an excellent option to acquire the necessary formation evaluation data...

...) and all employ LWD measurements. The integrated data of vertical wells formation evaluation, dean stark and dynamic data (well test) were used to validate results of the case study. The processing results showed significant improvement in determining true resistivity that provided highly coherent...

... formation evaluation real time system drilling fluids and materials correspond sandstone carbonate fake pore well logging pore porosity mineralogy water film society of petroleum engineers plug lenormand log analysis apparent porosity comprehensive input NMR reliability different size...