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Resistivity and SP Logging

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Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-H
... measurement University resistivity equation Archie permeability Upstream Oil & Gas Simulation Connate Water Resistivity mud-filtrate invasion invasion SPWLA 48th Annual Logging Symposium, June 3-6, 2007 1 COMBINED SIMULATION AND INVERSION OF SP AND RESISTIVITY LOGS FOR THE ESTIMATION...
Proceedings Papers

Paper presented at the SPWLA 22nd Annual Logging Symposium, June 23–26, 1981
Paper Number: SPWLA-1981-G
... ABSTRACT Formation water resistivity (Rw) is an important interpretation parameter. When water samples are available, Rw is determined by direct measurement or calculated from the water chemical analysis. It is more practical, however, to estimate Rw from the SP log. Poor correlations between...
Journal Articles
SPE J. 23 (02): 231–237.
Paper Number: SPE-9873-PA
Published: 01 April 1983
... of solid material. Quantitative interpretation of electrical resistivity and SP logs used to evaluate porosity and water saturation of permeable formations is affected by the clay content of the formation. Gamma ray measurements may also be affected by the presence of certain clays. Hill and Milbum studied...
Proceedings Papers

Paper presented at the Symposium on Low Permeability Gas Reservoirs, May 20–22, 1979
Paper Number: SPE-7918-MS
... require that the effect of surface or interface conductivity be considered when evaluating electric logs. However, the presence of clay minerals greatly complicate loginterpretation, particularly the electrical resistivity and SP logs. This can affect evaluation of hydrocarbon-bearing formations...
Journal Articles
SPE J. 8 (02): 107–122.
Paper Number: SPE-1863-A
Published: 01 June 1968
... resistivity and SP logs, and considerably affects evaluation of hydrocarbon-bearing formations. The conductance and electrochemical behavior of shaly sands and their relation to log interpretation have been studied by many workers. Wyllie and Lynch reviewed this work in some detail. Virtually all laboratory...
Images
Interpreted well <b>log</b> (Track1: GR and <b>SP</b>, Track 2: <b>Resistivity</b>, Track 3: Neu...
Published: 14 August 2018
Figure 1 Interpreted well log (Track1: GR and SP, Track 2: Resistivity, Track 3: Neutron-Density PHIE, Track 4: Depth, Track 5: Lithology, Track 6: Porosity and fluids content, Track 7/8: Brittleness, Track 9: HC content) More
Proceedings Papers

Paper presented at the SPWLA 28th Annual Logging Symposium, June 29–July 2, 1987
Paper Number: SPWLA-1987-SS
... for well-to-well correlation and qualitative shaliness estimation, little use is made of the SP log. Some of the usual reasons for not taking full advantage of the SP measurement are:SP amplitude is reduced in thin beds. SP character at bed boundaries is affected by the resistivity and degree of invasion...
Proceedings Papers

Paper presented at the SPWLA 26th Annual Logging Symposium, June 17–20, 1985
Paper Number: SPWLA-1985-VV
...), resistivity, self potential (SP) and magnetic susceptibility logging were done. Gold mineralization at the Barber-Larder prospect occurs within altered basic volcanic flows, tuffs and agglomerates which are overlain by metasediments (greywacke) and underlain by fuchsite bearing carbonate breccia. Alteration...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, September 27–30, 1998
Paper Number: SPE-49012-MS
.... are needed to solve for V,. If several clay minerals coexist, their respective clay bound water volumes add up. The resulting clay bound volume is inherently captured in the NMR distribution and its effect is also reflected in the measured resistivity and SP logs. Field Examples Well B Determination of Q...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-65257
.... With the help of the Rw computed from the SSP curves, several bypassed thin oil-bearing zones were found from log interpretations. INTRODUCTION The SP measurements are affected by some other factors like true resistivity of the permeable formation, resistivity and invasion diameter of the mud filtration...
Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-ZZ
... invasion University resistivity distribution SPWLA 48th Annual Logging Symposium, June 3-6, 2007 1 JOINT INVERSION OF SP AND DUAL LATERLOG/DUAL INDUCTION DATA IN 2D FORMATION Shanjun Li, Richard C. Liu and David Navarro, University of Houston Changxi Li and Cancan Zhou, CNPC Copyright 2007, held...
Journal Articles
Petrophysics 29 (05).
Paper Number: SPWLA-1988-v29n5a2
Published: 01 September 1988
... are compared with previous results obtained on a Resistor Network analog computer and extended to more complicated geometry. A deconvolution technique based on the solution to the forward problem has been optimized for the SP log in synergy with the resistivity profile derived from the new Phasor2 induction...
Proceedings Papers

Paper presented at the SPWLA 56th Annual Logging Symposium, July 18–22, 2015
Paper Number: SPWLA-2015-B
... and GR logs are available but where resistivity and porosity calibrations can be performed in a key well within the same field or can be inferred from core data. The mechanistic SP modeling algorithm is based on the fundamental concept of anion and cation migration in aqueous solutions with unequal...
Journal Articles
J Pet Technol 19 (10): 1395–1405.
Paper Number: SPE-1769-PA
Published: 01 October 1967
... resistivity from the SP curve becomes difficult in zones that contain clay, since changes in SP deflection may be due to changes in either clay content or water salinity. In hydrocarbon-producing reservoirs, the problem is further complicated because hydrocarbon saturation also reduces the SP. A log...
Journal Articles
SPE Res Eval & Eng 3 (06): 509–516.
Paper Number: SPE-68208-PA
Published: 01 December 2000
... to the depth track. Both the gas zone and the water zone contain a shaly interval visible on the GR and SP logs shown in track 1. Track 2 displays the resistivity logs. Track 3 displays the porosities from density (fdensity), CMR (fNMR) and neutron (fneutron). The gas effect on the density-neutron logs...
Proceedings Papers

Paper presented at the SPE Rocky Mountain Regional Meeting, May 11–13, 1988
Paper Number: SPE-17516-MS
... Abstract Water resistivity (Rw) values computed from the spontaneous potential (SP) log frequently yield low values for the Minnelusa formation of the Powder River Basin, Wyoming when compared with Rw values determined directly from water samples. These anomalies arise when conventional SP...
Proceedings Papers

Paper presented at the SPE Rocky Mountain Regional/Low-Permeability Reservoirs Symposium and Exhibition, March 12–15, 2000
Paper Number: SPE-60305-MS
... resistivity signals and low gamma ray values. High clay/sand ratios within some racies reduced effective porosity and permeability and contributed to high-resistivity readings. Calcaleous Eocene sediments are characterised by highly variable signals on the gamma ray. SP and resistivity logs...
Proceedings Papers

Paper presented at the SPE International Symposium on Formation Damage Control, February 23–24, 2000
Paper Number: SPE-58769-MS
... effects. Electrical currents flow around more resistive zones and smooth the shapes of log curves. Thinner zones typically had even more pronounced decreases in responses. Spontaneous potential (SP) curves have been and can still be significantly attenuated in many zones. Furthermore, SP bed boundaries...
Journal Articles
J Pet Technol 2 (05): 129–142.
Paper Number: SPE-950129-G
Published: 01 May 1950
...H.G. Doll An earlier paper on the general subject of the SP log has analyzed thelimitations of that log, in particular when dealing with thin permeable bedsenclosed in thick highly resistive ones. Under such conditions, the SP log doesnot give a good definition of the permeable beds. Selective SP...
Journal Articles
SPE Form Eval 2 (04): 478–486.
Paper Number: SPE-14281-PA
Published: 01 December 1987
.... The saltwater mud used in wells attenuates the spontaneous potential (SP), and thin beds, clay, low permeability. and variable-invasion profiles distort the SP curve, therefore, the SP is not available for water-resistivity determination. The apparent water-resistivity methods and apparent formation-resistivity...

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