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Resistivity and spontaneous (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-ZZ
... water resistivity which requires the Static Spontaneous Potential (SSP) computed from the SP. In order to correct these effects, many correction charts have been created. However, in very complicated logging environments, the charts cannot completely correct the mentioned effects. So, more useful...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0036
.... Doll, discovered the spontaneous potential (SP) log, typically used to broadly classify rocks as permeable or impermeable. Quantitatively speaking, the SP log finds one relevant application in the estimation of formation water resistivity based on Nernst's equation: = K log Rmf , Rw (1) where...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-65257
... log analysis calculation salinity well logging SP measurement static sp measurement tool Schlumberger potential difference principle application mud resistivity permeable formation diffusion potential vertical resolution SSPT Upstream Oil & Gas spwla 50 log principle...
Proceedings Papers

Paper presented at the Permian Basin Oil and Gas Recovery Conference, March 13–15, 1986
Paper Number: SPE-15030-MS
... SPE Members Abstract A new method is presented to determine formation water resistivity (R w) in sandstones. This procedure does not use the Spontaneous Potential (SP) log. Instead formation R w is Potential (SP) log. Instead formation R w is obtained from the overlying shale zones...
Proceedings Papers

Paper presented at the Formation Evaluation Symposium, October 27–28, 1955
Paper Number: SPE-583-G
.... On some specialized services such as the Microlog or Dipmeter an expanded depth scale of 25 in. =100 ft or 60 in. = 100 ft is frequently used. In very rare cases the expanded scale of 120 in. = 100 ft can be recorded. The Spontaneous Potential Curve The SP log (spontaneous or self-potential log...
Proceedings Papers

Paper presented at the SPWLA 43rd Annual Logging Symposium, June 2–5, 2002
Paper Number: SPWLA-2002-AAA
... ABSTRACT Formation water resistivity (Rw) is one of the most important parameters in log interpretation. Spontaneous potential or SP logs have been used in Rw calculation, which is especially effective in clean sand. However, when the sand contains clay, the clay interferes with the ion...
Proceedings Papers

Publisher: Society of Petrophysicists and Well-Log Analysts
Paper presented at the SPWLA 27th Formation Evaluation Symposium of Japan, September 14–15, 2022
Paper Number: SPWLA-JFES-2022-E
...) data, formation water analysis and conventional well logging data, the distribution area of surface water invasion reservoirs were captured. The difference of the spontaneous potential (SP) and natural gamma ray (GR) log response between such type of formation with common reservoir was extracted...
Proceedings Papers

Paper presented at the SPWLA 56th Annual Logging Symposium, July 18–22, 2015
Paper Number: SPWLA-2015-B
... Abstract Spontaneous Potential (SP) and Gamma Ray (GR) logs are often the only measurements available in many old hydrocarbon fields. Reliable coupled petrophysical interpretation of GR and SP logs requires previous accurate quantitative calibration for the effects of shale laminations, water...
Proceedings Papers

Paper presented at the SPE Rocky Mountain Regional Meeting, May 11–13, 1988
Paper Number: SPE-17516-MS
... conventional sp analysis SPE Society of Petroleum Engineers SPE 17516 Water Resistivity From Spontaneous Potential Logs in the Minnelusa Formation, Powder River Basin, Wyoming by B.A. Policky, Marathon Oil Co., and W.P. Iverson, U. of Wyoming SPE Members Copyright 1988 Society of Petroleum Engineers...
Proceedings Papers

Paper presented at the SPWLA 28th Annual Logging Symposium, June 29–July 2, 1987
Paper Number: SPWLA-1987-SS
... resiativity ohm/meter K&o: invaded zone resistivity ohm/meter Sl+ spontaneous potential (mV) SP.O,:deconvolved SP (mV) SP,.C:reconstructed SP (mV) SSl? static spontaneous potential (mV) SW: water saturation 12 SPWLA lknty-Eighth Annual Logging Symposium, June 29-July 2, 1987 References [1] Log Interpretation...
Proceedings Papers

Paper presented at the International Meeting on Petroleum Engineering, November 1–4, 1988
Paper Number: SPE-17836-MS
... steady production. Spontaneous Current Log CSCL) and Improved Spontaneous Potential Log CISPL) are new logg!ilg methods which~ ar·e developed on the basis of conventional SP log. n-,ese methods can be used to effectively distinguish thin beds and determine their flooded state. The SCL and ISPL...
Journal Articles
J Pet Technol 2 (06): 155–164.
Paper Number: SPE-950155-G
Published: 01 June 1950
... illustrate the essential features of the method. Introduction In conventional electrical logging, the spontaneous potential (SP) log is usedto delineate the permeable beds, and the resistivity logs are used primarily toprovide indications concerning the fluid content of the beds. When the formations are much...
Journal Articles
Petrophysics 36 (06).
Paper Number: SPWLA-1995-v36n6a2
Published: 01 November 1995
... characterization and resource identification. Subsequent to secondary resource identification, conventional EL and IEL suites (typical of mature fields) are used to delineate potentially productive reservoir limits. This involves superposing contour maps of resistivity, relative spontaneous potential (SP), net...
Journal Articles
J Pet Technol 22 (11): 1437–1446.
Paper Number: SPE-2551-PA
Published: 01 November 1970
.... Short spaced, highly focused resistivity devices or pad-type resistivity devices are commonly used for this purpose. Despite the limitations of the SP curve. there are a number of occasions and areas where it satisfactorily reflects permeable bed boundaries. Many times auxil- iary logs are not available...
Journal Articles
OIJ 2019 (10): 38–41.
Paper Number: OIJ-2019-10-038-041-RU
Published: 01 October 2019
...O. B. Kuzmichev; A. V. Zhonin; Yu. V. Martynova; S. A. Kolomasova The PDF file of this paper is in Russian. In layers of limited thickness and high resistance, the amplitude of the spontaneous potential (SP) logs differs significantly from the amplitude corresponding to the layer of unlimited...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5006
... that we used are resistivity, spontaneous potential (SP), elements from nuclear spectroscopy, bulk density, neutron, NMR and, of course, Core_Swt to compare to. The plot at the end of the abstract shows our goal: compare core Sw to log derived Sw_surface so that one compares both log and core at the same...
Proceedings Papers

Paper presented at the SPE California Regional Meeting, April 5–7, 1989
Paper Number: SPE-18759-MS
... in porosity and water saturation in the pay zones. The porosity and water saturation in the pay zones. The correlations of the Spontaneous Potential (SP), Gamma ray and resistivity traces of wells from the West Sak field are used to determine lateral and vertical gradients of the lithofacies of various...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 3–6, 1993
Paper Number: SPE-26433-MS
... wells are drilled by local production institutes called Neft, for the purpose of developing and producing delineated fields. Most research wells are evaluated with open hole logs such as spontaneous potential (SP), a combination of lateral and normal resistivities, conductivity, microlog, caliper...
Proceedings Papers

Paper presented at the International Petroleum Technology Conference, February 21–23, 2022
Paper Number: IPTC-22548-EA
... is often unknown. Several log-based techniques can be used to estimate the water resistivity, which can be used to calculate the equivalent formation water salinity, such as the Pickett's plot technique or spontaneous potential (SP log) but remain subjected to some uncertainties. Although captured down...
Proceedings Papers

Paper presented at the SPWLA 5th Annual Logging Symposium, May 13–15, 1964
Paper Number: SPWLA-1964-D
... and with suitable interpolation for uncatalogued formations. Spontaneous potential (SP) logs for each well are examined by the computer to determine the tops and bottoms of each sand of interest. The recorded SP values are corrected for the effects of bed thicknesses, formation re- sistivities and depth of invasion...

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