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Hardware-methodical complex for research of structurally complicated, including low-resistivity, reservoirs of Western Siberia fields

UDK: УДК 550.832
Key words: low-resistivity reservoirs, spontaneous potential, static potential, volume humidity, oil and gas saturation index
Authors: O.B. Kuzmichev (KogalymNIPIneft Branch of LUKOIL-Engineering LLC in Tyumen, RF, Tyumen), I.I. Garifullin (LUKOIL-West Siberia LLC, RF, Kogalym)

The problem of estimation of low-resistivity reservoirs volumetric data is considered. Low-resistivity reservoirs are oil and gas saturated ones, which true resistivity is below its critical value at the oil-water interface. During tests it is possible to obtain substantial oil or oil with water inflow from low-resistivity reservoirs, which by the results of well logging materials interpretation are defined as water-saturated.

Bigradient (divergent) method of the spontaneous polarization logging is developed in KogalymNIPIneft Branch of LUKOIL-Engineering LLC in Tyumen. The method differs from the existing method of measuring the spontaneous potential by higher sensitivity to the resistance of part of layer, not changed by penetration of drilling fluid, and by higher resolving capacity along the axis of the well (interlayer stratification). Hardware-methodical complex allows to measure spontaneous potential with new scheme, the first and the second differences of the spontaneous potential - with divergent logging method of L.M. Alpin.

The original method of an oil and gas saturation index estimating of structurally complicated, including low-resistivity, reservoirs is developed. Also the variant of oil and gas saturation index estimating according to the standard spontaneous polarization logging in the complex with the electric methods of borehole survey according to proposed method is provided for. The example of interpretation of low-resistivity oil-saturated reservoirs of Jurassic deposits of Maloklyuchevoye field of LUKOIL-West Siberia LLC is given.
References
1. Ezhova A.V., Methods of estimation of oil saturation of low-ohm collectors in
Jurassic depositions of South-East of Western Siberian platform (In Russ.),
Izvestiya Tomskogo politekhnicheskogo universiteta = Bulletin of the Tomsk
Polytechnic University, 2006, V. 309, no. 6, pp. 23–26.
2. Mel'nik I.A., Technology of increase information data geophysical researches
with the purpose of allocation of zones imposed epigenesist in
sandstones-collectors (In Russ.), Vestnik Tomskogo gosudarstvennogo universiteta,
2007, no. 12, pp. 223–227.
3. Semenov V.V., Mel'nik I.A., Pitkevich V.T. et al., The study of low-resistivity
reservoir using core material data (In Russ.), Geofizika, 2006, no. 2, pp. 42–47.
4. Hill H.J., Milburn J.D., Effect of clay and water salinitv on electrochemical
behavior of rocks, AIME, J. Petroleum Technol., 1956, no. 8, pp. 65–72.
5. Patnode H.W., Wyllie M.R.J., The presence of conductive solids in reservoir
rocks as a factor in electric log interpretation, Trans.AIME, 189, Tech. Publ,
1950, p. 2797.
6. Pirson S.J., Elements of oil reservoir engineering, New York, 1st. ed., McGraw-
Hill Book Company, Inc. 1950, 441 р.
7. Grim R.E., Clay mineralogy, Harper and Row, New York, 1968, 254 p.
8. Orlov L.I., Karpov E.N., Toporkov V.G., Petrofizicheskie issledovaniya kollektorov
nefti i gaza (Petrophysical study of oil and gas reservoirs), Moscow:
Nedra Publ., 1987, 216 p.
9. Ortiz I., Jr. Von Gonten W.D., Osoba J.S., Relationship of the electrochemical
potential of porous media with hydrocarbon saturation, The Log Analyst,
March-April, 1973.
10. Kobranova V.N., Petrofizika (Petrophysics), Moscow: Nedra Publ., 1986,
392 p.
11. Kuz'michev O.B., Issledovanie estestvennykh elektricheskikh poley v
neftegazorazvedochnykh skvazhinakh (teoriya, apparatura, metodika,
skvazhinnye ispytaniya) (The study of natural electric fields in the oil and gas
exploration wells (theory, apparatus, method, well tested)), St. Petersburg,
Nedra Publ., 2006, 252 p.
12. Patent no. 2251719 RF, MPK7 G 01 V 3/18, Method of sounding rocks, Inventors:
Kuz'michev O.B., Baymukhametov D.S.
13. Kuz'michev O.B., Technology of oil-and-gas exploration wells research by
bigradient self-potential logging (In Russ.), Neftyanoe khozyaystvo = Oil Industry,
2011, no. 8, pp. 24–28.
14. The certificate of registration of the computer program no. 2004611119,
Opredelenie podschetnykh parametrov na osnove sovmestnoy interpretatsii
dannykh karotazha PS i elektrometodov GIS dlya starogo fonda skvazhin (IntREst)
(Determination of calculation parameters on the basis of the joint interpretation
of SP logging and electrical methods data for old wells (IntREst)),
Authors: Kuz'michev O.B., Baymukhametov D.S., Livaev R.Z.
15. Tauzhnyanskiy G.V., Rudakova O.Yu., Timofeeva O.A., Mal inin A.V., Use of
nuclear-magnetic logging data while petrophysical substantiation of quantitative
criteria of terrigene reservoirs identification in Western Siberia (In Russ.),
Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy,
2013, no. 9, pp. 42–44.

The problem of estimation of low-resistivity reservoirs volumetric data is considered. Low-resistivity reservoirs are oil and gas saturated ones, which true resistivity is below its critical value at the oil-water interface. During tests it is possible to obtain substantial oil or oil with water inflow from low-resistivity reservoirs, which by the results of well logging materials interpretation are defined as water-saturated.

Bigradient (divergent) method of the spontaneous polarization logging is developed in KogalymNIPIneft Branch of LUKOIL-Engineering LLC in Tyumen. The method differs from the existing method of measuring the spontaneous potential by higher sensitivity to the resistance of part of layer, not changed by penetration of drilling fluid, and by higher resolving capacity along the axis of the well (interlayer stratification). Hardware-methodical complex allows to measure spontaneous potential with new scheme, the first and the second differences of the spontaneous potential - with divergent logging method of L.M. Alpin.

The original method of an oil and gas saturation index estimating of structurally complicated, including low-resistivity, reservoirs is developed. Also the variant of oil and gas saturation index estimating according to the standard spontaneous polarization logging in the complex with the electric methods of borehole survey according to proposed method is provided for. The example of interpretation of low-resistivity oil-saturated reservoirs of Jurassic deposits of Maloklyuchevoye field of LUKOIL-West Siberia LLC is given.
References
1. Ezhova A.V., Methods of estimation of oil saturation of low-ohm collectors in
Jurassic depositions of South-East of Western Siberian platform (In Russ.),
Izvestiya Tomskogo politekhnicheskogo universiteta = Bulletin of the Tomsk
Polytechnic University, 2006, V. 309, no. 6, pp. 23–26.
2. Mel'nik I.A., Technology of increase information data geophysical researches
with the purpose of allocation of zones imposed epigenesist in
sandstones-collectors (In Russ.), Vestnik Tomskogo gosudarstvennogo universiteta,
2007, no. 12, pp. 223–227.
3. Semenov V.V., Mel'nik I.A., Pitkevich V.T. et al., The study of low-resistivity
reservoir using core material data (In Russ.), Geofizika, 2006, no. 2, pp. 42–47.
4. Hill H.J., Milburn J.D., Effect of clay and water salinitv on electrochemical
behavior of rocks, AIME, J. Petroleum Technol., 1956, no. 8, pp. 65–72.
5. Patnode H.W., Wyllie M.R.J., The presence of conductive solids in reservoir
rocks as a factor in electric log interpretation, Trans.AIME, 189, Tech. Publ,
1950, p. 2797.
6. Pirson S.J., Elements of oil reservoir engineering, New York, 1st. ed., McGraw-
Hill Book Company, Inc. 1950, 441 р.
7. Grim R.E., Clay mineralogy, Harper and Row, New York, 1968, 254 p.
8. Orlov L.I., Karpov E.N., Toporkov V.G., Petrofizicheskie issledovaniya kollektorov
nefti i gaza (Petrophysical study of oil and gas reservoirs), Moscow:
Nedra Publ., 1987, 216 p.
9. Ortiz I., Jr. Von Gonten W.D., Osoba J.S., Relationship of the electrochemical
potential of porous media with hydrocarbon saturation, The Log Analyst,
March-April, 1973.
10. Kobranova V.N., Petrofizika (Petrophysics), Moscow: Nedra Publ., 1986,
392 p.
11. Kuz'michev O.B., Issledovanie estestvennykh elektricheskikh poley v
neftegazorazvedochnykh skvazhinakh (teoriya, apparatura, metodika,
skvazhinnye ispytaniya) (The study of natural electric fields in the oil and gas
exploration wells (theory, apparatus, method, well tested)), St. Petersburg,
Nedra Publ., 2006, 252 p.
12. Patent no. 2251719 RF, MPK7 G 01 V 3/18, Method of sounding rocks, Inventors:
Kuz'michev O.B., Baymukhametov D.S.
13. Kuz'michev O.B., Technology of oil-and-gas exploration wells research by
bigradient self-potential logging (In Russ.), Neftyanoe khozyaystvo = Oil Industry,
2011, no. 8, pp. 24–28.
14. The certificate of registration of the computer program no. 2004611119,
Opredelenie podschetnykh parametrov na osnove sovmestnoy interpretatsii
dannykh karotazha PS i elektrometodov GIS dlya starogo fonda skvazhin (IntREst)
(Determination of calculation parameters on the basis of the joint interpretation
of SP logging and electrical methods data for old wells (IntREst)),
Authors: Kuz'michev O.B., Baymukhametov D.S., Livaev R.Z.
15. Tauzhnyanskiy G.V., Rudakova O.Yu., Timofeeva O.A., Mal inin A.V., Use of
nuclear-magnetic logging data while petrophysical substantiation of quantitative
criteria of terrigene reservoirs identification in Western Siberia (In Russ.),
Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy,
2013, no. 9, pp. 42–44.


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