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Keywords: facies
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Journal Articles
Petrophysics 63 (04): 549–565.
Paper Number: SPWLA-2022-v63n4a5
Published: 02 August 2022
..., granitic rocks account for ~57% of the basement in terms of lithology, which provides an excellent opportunity to investigate the characteristics and distribution of basement granitic reservoirs. Here we report results from a log facies analysis of the basement granitic rocks in the PRMB based...
Journal Articles
Petrophysics 62 (02): 175–194.
Paper Number: SPWLA-2021-v62n2a3
Published: 01 April 2021
... exposure surfaces. Stratiform breccia intervals and pseudomorphs after nodular anhydrite indicate the former presence of platform-top evaporites. Reef structures within the Ørn Formation have been drilled in Well 7220/11-3 and Sidetrack 7220/11-3 AR. Facies encountered in core are very similar...
Journal Articles
Petrophysics 60 (06): 838–853.
Paper Number: SPWLA-2019-v60n6a8
Published: 01 December 2019
... and fluid concentrations. In this paper, a data-driven approach is developed to classify vuggy facies based on core and well logs from a key well penetrating the Arbuckle formation in Kansas. Three supervised machine-learning methods, namely artificial neural networks (ANN), support vector machines (SVM...
Journal Articles
Petrophysics 60 (02): 306–325.
Paper Number: SPWLA-2019-v60n2a8
Published: 01 April 2019
... and the uncertainties related to the mud-filtrate parameters, the invasion zone is jointly inverted with the vertical capillary equilibrium at field-scale describing the vertical water saturation profile in the reservoir for each facies. The following workflow is then used: First, the invasion is solved in the water...
Journal Articles
Petrophysics 59 (02): 118–135.
Paper Number: SPWLA-2018-v59n2a1
Published: 01 April 2018
... of various log measurements to arrive at the correct petrophysical solution. A review of rock physics literature is presented to highlight the underlying reasons for log behavior in silty facies. Generally, laminated rocks are evaluated from two different approaches: high-resolution, or bulk rock volume...
Journal Articles
Petrophysics 57 (05): 447–464.
Paper Number: SPWLA-2016-v57n5a2
Published: 01 October 2016
... distribution and state is not only desired but required for predicting reservoir performance, estimating realistic recoverable volumes, and optimizing costs for development and production. The Almond Formation is characterized by three depositional facies associations: shoreface, deltaic and fluvial-coastal...
Journal Articles
Petrophysics 56 (06): 577–591.
Paper Number: SPWLA-2015-v56n6a2
Published: 01 December 2015
... & Well Log Analysts log analysis well logging exponent borehole image log presalt carbonate evaluation Brazil permeability vuggy porosity porosity Rio de Janeiro University stromatolite Santos basin december 2015 petrophysics december 2015 Upstream Oil & Gas facies image log...
Journal Articles
Petrophysics 56 (06): 592–614.
Paper Number: SPWLA-2015-v56n6a3
Published: 01 December 2015
... reservoirs may be expressed in the near-wellbore region. A simple approach restricted to porosity log interpretation accurately characterizes the reservoir facies but misses detection of "high-flow zones" that represent thin (typically 10 to 30 cm) zones of high porosity (up to 100%) and potentially 100s...
Journal Articles
Petrophysics 56 (02): 125–139.
Paper Number: SPWLA-2015-v56n2a3
Published: 01 April 2015
... and distributing permeability in a facies model is important to account for the full heterogeneity of the formation. Direct measurements of reservoir permeability are usually obtained from core-plug samples; however, this data can be problematic because it may not represent the true permeability distribution...
Journal Articles
Petrophysics 56 (01): 45–57.
Paper Number: SPWLA-2015-v56n1a4
Published: 01 February 2015
... Intelligence Wolfcamp formation porosity plug pore space Bailey Reservoir Characterization Fluid Dynamics pulse-decay permeability wolfcamp rock SEM image pore size Upstream Oil & Gas facies relaxation saturation petrophysics february 2015 flow in porous media petrophysical...
Journal Articles
Petrophysics 52 (05): 344–356.
Paper Number: SPWLA-2011-v52n5a2
Published: 01 October 2011
... precise information about mineralogy, lithology, reservoir quality, and even depositional facies. These techniques are a valuable aid to selection of the mineral assemblage that will be used to perform petrophysical interpretations of logs. Although the data and examples presented in the paper are unique...
Journal Articles
Petrophysics 47 (02).
Paper Number: SPWLA-2006-v47n2a3
Published: 01 April 2006
...D. Rose; P.M. Hansen; M.J. Raven ABSTRACT Detection of facies changes along horizontal wells in a Middle East carbonate reservoir, known to comprise several different facies, is not always possible with conventional LWD logs because the different facies have similar porosity responses. Drill-pipe...
Journal Articles
Petrophysics 47 (01).
Paper Number: SPWLA-2006-v47n1a3
Published: 01 February 2006
... for Tengiz is based on simple "gross" facies defined by the main depositional areas of the field. New rock types have been defined by using Mercury Injection Capillary Pressure (MICP) measurements from 23 wells in conjunction with depositional facies and stratigraphy. This paper describes the integrated...
Journal Articles
Petrophysics 47 (01).
Paper Number: SPWLA-2006-v47n1a1
Published: 01 February 2006
... borehole image and conventional log processing with calibration to core data. This approach has allowed the quantification of porosity and permeability heterogeneity in vuggy carbonate facies in the field. For example, in different vuggy zones of the San Andres Formation, with similar total porosity values...
Journal Articles
Petrophysics 46 (05).
Paper Number: SPWLA-2005-v46n5a5
Published: 01 October 2005
... performed under isotropic conditions on carbonate rocks from different reservoir facies and for various oil and brine saturations. This experimental work shows that water-weakening not only affects chalk but also widely affects shallow-water carbonates with preserved or enhanced porosity. In addition...
Journal Articles
Petrophysics 45 (01).
Paper Number: SPWLA-2004-v45n1a2
Published: 01 January 2004
... the dynamic properties of the reservoir. This paper investigates the integration of electrical borehole images (EBI) with other conventional logs for reservoir facies and permeability modeling in carbonate reservoirs. Due to its high resolution, electrical borehole imaging can provide important information...
Journal Articles
Petrophysics 43 (02).
Paper Number: SPWLA-2002-v43n2a1
Published: 01 March 2002
... improve the understanding of variability in well log data and guide the selection of optimal well log parameters for facies discrimination and classification. We use data from a North Sea turbidity field, and define six different facies groups (I-VI) based on clay content, grain size, and bedding...
Journal Articles
Petrophysics 41 (04).
Paper Number: SPWLA-2000-v41n4a1
Published: 01 July 2000
...D. Bergslien; O.M. Burtz; F.M. Haynes; M.S. Munkholm The massive Paleocene oil sands of the Balder Field are overlain by several thinly bedded Eocene sand-prone packages of variable facies and reservoir quality. Although these sands have been penetrated by numerous exploration and development wells...
Journal Articles
Petrophysics 38 (06).
Paper Number: SPWLA-1997-v38n6a4
Published: 01 November 1997
... of Petrophysicists & Well Log Analysts Upstream Oil & Gas basin Reservoir Characterization facies Boonsville wireline resistivity imaging midcontinent sandstone sequence log analyst november-december 1997 equation log analysis resistivity imaging evaluation interpretation fracture well...
Journal Articles
Petrophysics 37 (02).
Paper Number: SPWLA-1996-v37n2a1
Published: 01 March 1996
...David L. Carr; Robert Y. Elphick; Ronald A. Johns; David E. Lancaster When facies vary widely across a field, defining well-to-well stratigraphic correlations can be difficult. During the secondary gas recovery (SGR) study of Boonsville field, workers encountered a complex stratigraphic situation...

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