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Spontaneous (SP) log
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in Informational Advantages and Accuracy Characteristics of the Adaptive Well Log Data Interpretation
Published: 18 October 2011
Fig. 2 Correspondence between spontaneous potential (SP) log amplitudes and characteristic values (μ max , μ min and M) of the petrophysical reservoir model (D, E), changes in the content of clay minerals according to different cement water-holding capacities (C, G). "Conservation principles" of ... More
Images
Published: 14 April 2009
Figure 8 The distribution of the Spontaneous Potential (SP) from well logs More
Proceedings Papers
Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-ZZ
... and if mud salinity is different from formation water salinity, dipole layers form along borehole wall, layer boundaries and invasion zone boundaries. The dipole layers produce Spontaneous Potential (SP) in the borehole. So, for long time, well logging analysts have used the SP curve to determine permeable...
Proceedings Papers
Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0036
... logging symposium torres-verdín Abstract Calculations and quantitative petrophysical interpretations stemming from borehole measurements of spontaneous potential (SP) are commonly performed via Nernst's equation under the assumptions of (a) shallow mud-filtrate invasion, (b) negligible streaming...
Journal Articles
Journal:
Journal of Petroleum Technology
Publisher: Society of Petroleum Engineers (SPE)
J Pet Technol 63 (05): 83–85.
Paper Number: SPE-0511-0083-JPT
Published: 01 May 2011
... Upstream Oil & Gas chemical composition log analysis breakthrough real-time measurement real time system waterflooding Brine te potential intelligent well inflow mineral surface SP signal gradient spontaneous potential water front reservoir electrode ek potential salinity saturation...
Journal Articles
Journal:
Journal of Petroleum Technology
Publisher: Society of Petroleum Engineers (SPE)
J Pet Technol 24 (02): 151–153.
Paper Number: SPE-3570-PA
Published: 01 February 1972
..., the Spontaneous Potential (SP) Log. As implied by Gillingham, zonal differences between SP logs run in wells while they are shut in and during injection are related to flow rate. This technique has the sensitivity to profile most open-hole or fiber-glass-lined fresh water injection wells, but lacks...
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 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 Petroleum Engineers (SPE)
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 SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-65257
... Analysts (SPWLA) and the submitting authors. This paper was prepared for presentation at the SPWLA 50th Annual Logging Symposium held in The Woodlands, Texas, United States, June 21-24, 2009. ABSTRACT Conventional Spontaneous Potential (SP) measurements are usually affected by many factors...
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
Publisher: Society of Petroleum Engineers (SPE)
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...
Journal Articles
Journal:
Neftyanoe khozyaystvo - Oil Industry
Publisher: Oil Industry Journal
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
Publisher: Society of Petroleum Engineers (SPE)
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...
Journal Articles
Journal:
Journal of Petroleum Technology
Publisher: Society of Petroleum Engineers (SPE)
J Pet Technol 36 (02): 267–275.
Paper Number: SPE-11093-PA
Published: 01 February 1984
... many more data. The point-by-point approach usually taken has its weakness, however, in that the total zones are not considered. Taking the spontaneous potential (SP) log as an example, we see that it measures correct values only in thick beds, and far enough from bed boun- daries. Calculations based...
Proceedings Papers
Paper presented at the SPWLA 28th Annual Logging Symposium, June 29–July 2, 1987
Paper Number: SPWLA-1987-SS
... ABSTRACT In the early days of well logging the Spontaneous Potential (SP) log was used extensively by Interpreters to detect the presence of clean permeable zones and to estimate the potential of hydrocarbon prospects. Unfortunately, in today's modern formation evaluation programs, except...
Journal Articles
Petrophysics 36 (05).
Paper Number: SPWLA-1995-v36n5a3
Published: 01 September 1995
...M-Y. Chen; T.M. Habashy; D.R. Mariana; R.J. Schroeder; M.R. Taherian The complex distribution of electrochemical sources in the borehole environment has historically limited the quantitative interpretation of spontaneous potential (SP) logs. In addition, SP models based on characterizations...
Journal Articles
Journal:
Journal of Petroleum Technology
Publisher: Society of Petroleum Engineers (SPE)
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...
