Factor Analysis оf the Efficiency оf Drilling Lateral Shafts with Horizontal Ending

Introduction. One of the ways to increase oil recovery at the late stages of development of mature fields is the drilling of lateral shafts with horizontal sections. Hard-to-recover residual oil reserves are mainly concentrated in the marginal zones of formations with small oil-saturated thicknesses and low permeability. The article studies the efficiency of drilling lateral horizontal shafts and the resulting additional oil production by multifactor analysis with account of geological heterogeneity and technological features.

Materials and research methods. The effectiveness of the results obtained when drilling lateral horizontal shafts depends not only on the choice of a point on the map of the oil reservoir, but also on the structure of the residual hard-to-recover oil reserves and the filtration and reservoir properties of the reservoir. The article presents an analysis of the obtained results of drilled horizontal lateral shafts, the placement of which was worked out with account of the facies conditions of formation and geological heterogeneity.

Research results and their discussion. The authors analyzed the operation of lateral horizontal shafts from the moment of their launch, which makes it possible to determine the dependence of the efficiency of their work on the joint or separate operation of the AB1 3 and AB2 layers, taking into account the geological features of sedimentation and differences in filtration and capacitance properties. To select prospective wells for cutting the lateral trunk, groups of facies of continental genesis were identified, with which sand bodies are associated.

Conclusion. The dependency of technological parameters of the lateral second shafts on geological features is traced. On the basis of factor analysis directions for further approaches to the drilling of the UW are specified. Monitoring of the actual data determined the factors affecting the efficiency of the input technological indicators of the wells.

1. Alekseev V.P. Atlas of subaqual facies of Lower Cretaceous deposits of Western Siberia (KhMAO-Yugra). Yekaterinburg: Publishing house of UGSU, 2014. 284 p. (In Russ.).

2. Amon E.O., Alekseev V.P., Glebov A.F., Savenko V.A., Fedorov Yu.N. Stratigraphy and paleogeography of the Mesozoic- Cenozoic sedimentary cover of the Shaimsky oil and gas bearing region (Western Siberia); edited by V.P. Alekseev. Yekaterinburg: Publishing house of UGSU, 2010. 257 p. (In Russ.).

3. Badretdinov I.A., Karpov V.G. Classification of methods for increasing oil recovery (economic approach): Moscow, Oil and gas Geology. Theory and practice [Electronic resource]. URL: http://www.ngtp.ru/ (accessed 20.04.2023). (In Russ.).

4. Bakirov D.L., Podkuiko P.P., Babushkin E.V., Fattakhov M.M. Ensuring trouble-free wiring of horizontal lateral shafts in the intervals of occurrence of unstable rocks: Oil industry. 2011. No. 8. P. 46–49. (In Russ.).

5. Gilyazov R.M. Drilling of oil wells with side shafts. M.: Nedra- Businesscenter, 2002. 255 p. (In Russ.).

6. Devold H. Handbook of oil and gas production. Introduction to oil and gas production. ABB ATPA Oil and Gas. Oslo, 2006. 82 p. (In Russ.).

7. Walcott D. Development and management of deposits during flooding. Methods of design, implementation and monitoring to optimize the rate of production and development of reserves: Moscow, 2001. 144 p. (In Russ.).

8. Dake L. P. The practice of field development (Revised edition). Development of oil and gas science 36. Oxford, England: Elsevier, 1994. P. 445–450. (In Russ.).

9. Zheludkov A.V., Mishagina V.F. Analysis of drilling of lateral horizontal shafts along the SE11 formation on the example of one of the deposits of Western Siberia (scientific article): Science. Innovations. Technologies. 2022. No. 1. P. 7–20. (In Russ.).

10. Ivanov V.A., Khramova V.G., Diyarov D.O. Structure of the pore space of oil and gas reservoirs. M.: Nedra, 1974. 97 p. (In Russ.).

11. Koveshnikov A. E. Lithology and features of the formation of Cambrian deposits in the Southeastern part of the West Siberian geosyneclise: Proceedings of TPU. 2014. Vol. 325, No. 1: Planet Resources. P. 16–27. (In Russ.).

12. Lysenko V.D., Greifer V.I. Rational development of oil fields. Moscow: Nedra-Businesscenter LLC, 2005. 607 p. (In Russ.).

13. Lysenko V.D. Development of oil fields: Theory and practice. M: Nedra, 1996. 367 p. (In Russ.).

14. Muromtsev V.S. Electrometric geology of sand bodies – lithological traps of oil and gas. L.: Nedra, 1984. 260 p. (In Russ.).

15. Neskoromnykh V.V. Directional drilling and fundamentals of core measurement. Irkutsk: publishing house of IrSTU, 2010. 328 p. (In Russ.).

16. Rovinsky M.V., Reimer V.V., Ovchinnikova E.I., Mishagina V.F. Improving the efficiency of the development of low-productive reservoirs of the Alym formation on the example of the AB13 formation of the Uryevsky field: Oilfield business. 2021. No. 12 (636). P. 19–24. (In Russ.).

17. Suchkov B.M. Horizontal wells, Moscow-Izhevsk, 2006. 424 p. (In Russ.).

18. Shpilman V.I., Zmanovsky N.I., Podsosova L.L. Tectonic map of the central part of the West Siberian plate / ed. NATS RN KhMAO in 1998; ed. 1:2 000 000. Tyumen: National Research Institute of KhMAO, 1998. (In Russ.).

19. Schoenberger V.M. Technique and technology of construction of side shafts in oil and gas wells: Textbook. Tyumen: TSOGU, 2007. 496 p. (In Russ.).

20. Yartiev A.F., Khakimzyanov I.N., Petrov V.N., Idiyatullina Z.S. Improvement of technologies for the development of oil reserves from heterogeneous and complex reservoirs of the Republic of Tatarstan: monograph. Kazan: Ikhlas, 2016. 189 p. (In Russ.).