Geoinformatika 2016; 1(57) : 37-42 (in Ukrainian)

ANALYSIS OF ELECTRICAL LOGGING DATA INTERPRETATION IN THE STUDY OF LOW-RESERVOIR ROCKS FOR EXAMPLE MALODIVYTSKOHO DEPOSIT

V.М. Kurhanskyy, K.О. Ruchko

Taras Shevchenko National University of Kyiv, Institute of Geology, 90 Vasylkivska Str., Kyiv 03022, Ukraine, cgph@univ.kiev.ua, Pirofillon@i.ua

Purpose. The subject matter of the research is low resistance reservoirs from which, based on the test results, flows of oil were received an example being terrigenous sediments in the Dnieper-Donets basin, namely, Malodivytske oil field. The goal of the research is to analyses electrical logging data interpretation in the low-reservoir investigation.
Design/methodology/approach. The method of the research is collection, processing and interpretation of well survey research data with the help of  the “Geopoisk” system. Complex electrical methods interpretation improves the accuracy and unambiguity of assessing resistance layers and penetration zones.
Findings. Geologists are often faced with anomalous low resistivity, which lead to incorrect determination of the degree of saturation and oil-saturation capacity in determining the nature of saturation and composition reservoir fluids at well-logging in productive sediments. In determining the nature of well saturation, wells are interpreted as water-saturated under the geophysical wells research. However, the test gave many examples of low-resistance layers producing tides of anhydrous oil.
Practical value/implications. We have analyzed electrical logging data interpretation in the productive reservoir and suggested a method to determine the nature of collectors saturation. We propose to use pulsed neutron-neutron logging method (PNNLM) to improve the efficiency of locating rocks, which can be collectors in low geological capacity section, and of determining the nature of saturation.  

Keywords: electrical resistivity, the nature of saturation, low-resistivity reservoirs.

The full text of papers 

References:

1. Vendel’shteyn B.Yu. O svyazi mezhdu parametrom poristosti, koeffitsiyentom poverkhnostnoy provodimosti, diffuzionnogo-adsorbtsionnymi svoystvami terrigennykh porod. Trudy MINKh i GP. Moscow, Gostoptekhizdat, 1960, no. 31, pp. 16-30 (inRussian).
2. Kneller L.Ye., Potapov A.P. Elektricheskiye, elektromagnitnyye metody i programmnoye obespecheniye opredeleniya soprotivleniy na osnove modelirovaniya. Karotazhnik, 2006, no. 7-8, pp. 160-172 (in Russian).
3. Kobranova V.N. Petrofizika. Uchebnik dlja vuzov. Moscow, Nedra, 1986, 392 p. (in Russian).
4. Kozhevnikov D.A. Neytronnyye kharakteristiki gornykh porod i ikh ispol’zovaniye v neftepromyslovoy geologii. Moscow, Nedra, 1982, 221 p. (in Russian).
5. Krasnozhon M.D. Kompiuteryzovana tekhnolohiia interpretatsii materialiv elektrychnoho karotazhu. Zbirnyk naukovykh prats Ukrainskoho derzhavnoho heolohorozviduvalnoho instytutu. Kyiv, 2001, pp. 5-18 (in Ukrainian).
6. Kukuruza V.D. Geoelektricheskiye faktory v protsessakh formirovaniya neftegazonosnosti nedr. Kyiv, 2003, 416 p. (in Russian).
7. Kurgansky V.M., Ruchko K.O. Lithologic and petrophysical characteristics of low-resistivity reservoirs of priluky oil field. Mineralni resursy Ukrainy, 2014, no. 4, pp. 20-25 (in Ukrainian).
8. Nikiforova O.G. Saturation characteristics and formation resistivity estimates in low-resistance terrigenous reservoirs using well logging data. Geophysics, 2008, no. 1, pp. 22-24 (in Russian).
9. Shakarov H.I., Sultanov L.A., Kjazimov R.V., Ganife-Zade Ch.D., Abdullaev A.I. O nekotoryh prichinah nizkogo soprotivlenija produktivnyh kollektorov. Karotazhnik, 2007, no. 12, pp. 47 (in Russian).
10. Fedorishin D.D., Garanіn O.A., Fedorishin S.D. Do pytannia prychyn minlyvosti elektrychnykh porid-kolektoriv naftohazovykh rodovyshch Ukrainy. Rozvidka ta rozrobka naftovykh i hazovykh rodovyshch, 2008, no. 1, pp. 86-88 (inUkrainian).
11. Worthington P. Recognition and evaluation of low-resistivity pay. Petroleum Geoscience, March 2000, vol. 6, no. 1, pp. 77-92.