«Geology, geophysics and development of oil and gas fields»

The influence of the azimuth of the well wiring and the angle of entry into the reservoir on the efficiency of hydraulic fracturing and the number of complications

UDC: 622.276.66
DOI: -

Authors:

¹ LUKOIL-Engineering LLC, Kogalym, Russia

Keywords: zenith angle, azimuth angle, hydraulic fracturing, complications in the fracturing process, two-stage fracturing, regional stress, maximum stress

Annotation:

Currently, hard-to-recover oil reserves associated with low-permeability, poorly drained, heterogeneous and dissected reservoirs are widely involved in development. One of the effective methods to increase the productivity of wells, penetrating such formations and increasing the rate of oil recovery from them, is hydraulic fracturing. In the conditions of an ever-increasing degree of reserves development, high and at the same time ever-increasing values of water cut in the production fund, significant coverage of the hydraulic fracturing method of the producing fund, the presence of various geological limitations, the issue of increasing the efficiency of hydraulic fracturing and reducing the number of complications during the work becomes especially relevant.

This paper analyzes the data of hydraulic fracturing carried out at one of the TPEs of the fund of LUKOIL-Western Siberia in 2016–2021. The trajectories of the wellbores within the productive formations have different values of zenith angles and azimuthal directions. When performing hydraulic fracturing, the contact angle between the created fracture and the wellbore can vary significantly. It is important to understand what impact these factors can have on the efficiency of hydraulic fracturing and the number of complications.

The purpose of the work is to increase the efficiency of hydraulic fracturing and reduce the number of complications at various zenith and azimuth angles.

The following tasks were completed in this work:

• analysis of the patterns of influence of the azimuth and zenith angles on the number of complications during hydraulic fracturing;

• determination of the critical zenith angle, when exceeded, the effect of hydraulic fracturing decreases;

• analysis of the patterns of influence of the azimuth and zenith angles on the efficiency of hydraulic fracturing;

• analysis of the influence of technologies on the efficiency of hydraulic fracturing in wells with various azimuth and zenith angles;

• issuance of recommendations for increasing the efficiency of hydraulic fracturing and reducing the number of complications.

Bibliography:

1. Opredelenie napravleniya obrazovaniya treshchiny gidrorazryva plasta / V.V. Panikarovskiy, E.V. Panikarovskiy, N.N. Zakirov, V.M. Spasibov // Neftegazovoe delo. – 2022. – T. 20. – № 4. – S. 73–81.

2. Salimov F.S. Vovlechenie v razrabotku slabodreniruemykh, trudnoizvlekaemykh zapasov nefti putem izmeneniya napravleniya treshchin GRP // Ekspozitsiya Neft’ Gaz. – 2017. – № 6(59). – S. 47–51.

3. Tsivelev K.V. Vliyanie pereorientatsii azimuta treshchiny gidrorazryva plasta na produktivnost’ skvazhin // Problemy razrabotki mestorozhdeniy uglevodorodnykh i rudnykh poleznykh iskopaemykh. – 2018. – № 1. – S. 222–224.

4. Mulyukov D.R., Fedorov A.I. Analiz napravleniya razvitiya treshchin gidrorazryva plasta v sisteme razrabotki trudnoizvlekaemykh zapasov na osnove upravleniya napryazhennym sostoyaniem plasta // Neft. khoz-vo. – 2024. – № 1. – S. 54–59. – DOI: 10.24887/0028-2448-2024-1-54-59

5. Vliyanie napravleniya treshchin mnogostadiynogo gidravlicheskogo razryva plasta na koeffitsient izvlecheniya nefti / P.N. Zyatikov, K.V. Sinebryukhov, Yu.S. Berezovskiy, A.S. Trushko // Vestnik Tomskogo gos. un-ta. Matematika i mekhanika. – 2019. – № 58. – S. 84–98. – DOI: 10.17223/19988621/58/7

6. Research on Productivity for Multi-stage Fracturing of Horizontal Wells / D.J. Xu, R.Q. Liao, Z.W. Li, Z.C. Zhao, F. Zhang // Chemical Engineering Transactions. – 2015. – Vol. 46. – Pp. 1189−1194. – DOI: 10.3303/CET1546199

7. A New Model to Predict the Unsteady Production of Fractured Horizontal Wells / D.J. Xu, R.Q. Liao, Z.W. Li, Z.C. Zhao, F. Zhang // Sains Malaysiana. – Malaysiana: UKM University, 2016. – Vol. 45(10). – Pp. 1579−1587. – DOI: 10.1016/j.petrol. 2016.12.037

8. Economides M.J., Martin A.N. How to decide between horizontal transverse, horizontal longitudinal and vertical fractured completion // SPE Annual Technical Conference and Exhibition. – 2010.

9. Vliyanie azimuta provodki skvazhiny i ugla vkhoda v plast na effektivnost’ gidrorazryva plasta na primere bokovykh stvolov ob"ekta BV8 Povkhovskogo mestorozhdeniya TPP "Povkhneftegaz" / A.V. Bukharov, T.A. Khakimov, N.A. Demyanenko, A.V. Rodionov // Neftepromyslovoe delo. – 2018. – № 10. – S. 35–42. – DOI: 10.30713/0207-2351-2018-10-35-42

10. Nikitin A.N. Opredelenie geometrii treshchin gidravlicheskogo razryva plasta na mestorozhdeniyakh nefti Zapadnoy Sibiri s ispol’zovaniem geofizicheskikh issledovaniy: avtoref. dis. … kand. tekhn. nauk. – Ufa, 2014. – 21 s.

11. Valeev A.S., Salimov F.S. Sposob formirovaniya treshchin ili razryvov: patent RF № 2637539 C1; zayavl. 31.08.2016; opubl. 05.12.2017. – Byul. № 34. – S. 14.

12. Vnedrenie perspektivnykh tekhnologicheskikh resheniy pri provedenii MGRP na ob"ekte BV7 Yuzhno-Vyintoyskogo mestorozhdeniya / A.V. Bukharov, A.Yu. Sentsov, A.V. Rodionov [i dr.] // Geologiya, geofizika, i razrabotka neftyanykh i gazovykh mestorozhdeniy. – 2017. – № 9. – S. 69–76.