Forecasting the placement of horizontal and directional wells depending on the geological structure of the low-permeability formation YUS2

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Abstract

This study investigates the construction of a probabilistic-statistical model using two reference areas of field X, drilled with horizontal and deviated wells. The model involves discriminant analysis combined with the development of both linear and multivariate regression relationships to predict well locations within the undrilled area and potentially forecast initial oil production rates. The impact of geological structure on well placement is analyzed using a t-test for comparing means. Based on identified differences in the geological structure at well locations, discriminant analysis was conducted to determine the factors influencing well type selection. The analysis revealed that the areas differ in geological structure, and porosity, permeability, and sand content of the formation influence the placement of horizontal and deviated wells. Linear and multivariate regression analysis was performed to classify the territory into zones with distinct geological structures. Linear regression analysis indicated that oil production rates in low-permeability reservoirs are differentiated into three classes with varying parameter influences within each production rate range. Multivariate regression analysis enabled the assessment of the combined influence of the most statistically significant formation characteristics on oil production rates and provided multivariate regression equations for predicting oil production rates of horizontal and deviated wells.

Keywords

horizontal wellsdirectional wellsgeological characteristicsstatistical analysislow-permeability formation

Bibliography

  1. 1.Ermakov P.V. et al. Chto vybrat' dlia osvoeniia nizkoprontisaemykh vodonezhnykh zon - gorizontal'nye stvoly s mnogostadininym gidrorazryvom plata isi mnogozaboiye skvazhiny? [Low-permeable oil and water zones to be developed by horizontal wells with multistage hydraulic frac or by multilateral wells?]. Ekspozitsiia Neft Gaz 2022, no. 8, pp. 82-86. DOI: 10.24412/2076-6785-2022-8-82-86 Scholar
  2. 2.Martynov K.S. Osobennosti primeneniia i stroitel'stva gorizontal'nykh skvazhini pri razrabotke fedorovskogo mestorozhdeniia [Features of the use and construction of horizontal wells in the development of the Fedorovskoye field]. Tekhnika i tekhnologiia stroitel'stva i remonta neftiynykh i gazovykh skvazhin, 2015, pp. 175-178. Scholar
  3. 3.Suchkov B.M. Gorizontal'nye skvazhiny [Horizontal wells]. Moscow, Izhevsk: NITs "Reguliarnaia i khaoticheskaia dinamika", 2006, 424 p. Scholar
  4. 4.Evchenko V.S., Zakharchenko N.P., Kagan Ia.M. et al. Razrabotka neftiynykh mestorozhdenii naklonno napravlennymi skvazhinami [Development of oil fields by directional wells]. Moscow: Nedra, 1986, 278 p. Scholar
  5. 5.Cinco L.H., Samaniego V.F., Dominguez A.N. Transient pressure behavior for a well with a finite-conductivity vertical fracture. Society of Petroleum Engineers Journal, 1978, vol. 18, no. 04, pp. 253-264. DOI: 10.2118/6014-PA Scholar
  6. 6.Nikolaev N.M. et al. Sposob razrabotki neftianykh nizkopronitsaemykh zalezhei, osnovannyi na primenenii gorizontal'nykh skvazhin s prodol'nymi treshchinami gidrorazryva plasta [Method for developing oil low-permeability deposits based on the use of horizontal wells with longitudinal hydraulic fractures]. 2018. Scholar
  7. 7.Pavel'eva O.N., Basov A.O., Pavel'eva Yu.N. Tekhnologicheskii analiz effektivnosti primeneniia GS GRP v sravnenii s NNS na Priobskom mestorozhdenii [Technological analysis of the effectiveness of horizontal wells with hydraulic fracturing in comparison with directional wells at the Priobskoye field]. Bulatovskie chteniia, 2017, vol. 2, pp. 201-203. Scholar
  8. 8.Galeev R.R. et al. Vybor optimal'noi sistemy razrabotki nizkopronitsaemykh plastov s primeneniem gorizontal'nykh skvazhin s mnozhestvennymi treshchinami gidrorazryva [Selection of optimal development system for low-permeability formations using horizontal wells with multiple hydraulic fractures]. Neftianoe khoziaistvo, 2013, no. 10, pp. 62-65. Scholar
  9. 9.Andreev V.V., Grebnev P.V., Latypov M.V. Optimizatsiia stroitel'stva gorizontal'nykh i naklonno napravlennykh skvazhin za schet primeneniia karotazha v protsesse bureniia [Optimization of horizontal and directional well construction through the use of logging while drilling]. 2021. Scholar
  10. 10.Giger F.M. Low-permeability reservoirs development using horizontal wells. SPE Rocky Mountain Petroleum Technology Conference/Low-Permeability Reservoirs Symposium. SPE, 1987, P. SPE-16406-MS. DOI: 10.2118/16406-MS Scholar
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Article information

Published
31 October 2024
Issue date
31 October 2024
Issue
Vol. 24, No. 4 (2024)
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