Optimization of well preparation costs before hydraulic fracturing by justifying the type of perforation and the required number of perforations
UDC: 622.276.66
DOI: -
Authors:
KONDRATIEV SERGEY A.
1,
SHARAFEEV RAMIL R.1,
NOVOKRESHCHENNYKH DMITRY V.1,
VOTINOV ALEXANDER S.1,
RAKITIN EVGENY L.1
1 LUKOIL-Engineering, Perm, Russia
Keywords: proppant hydraulic fracturing of a formation, cumulative perforation, perforation density, friction pressure losses, diameter of the perforation channel, charges penetration depth, step-down test
Annotation:
To create a stable hydrodynamic connection with the formation, perforation is performed for the purpose of formation hydraulic fracturing (FHF), the cost of which can range from 30 to 70 % of the cost of the work of a geophysical well surveys crew. The authors of the article analyzed the hydraulic fracturing performed at wells in the Perm Region and the Komi Republic with different types of perforation in 2020–2021 and determined the potential for optimizing the applied approach to perforation. A theoretical calculation of friction pressure losses in the perforation interval has been performed, which are compared with the actual friction pressure losses determined by the results of the analysis of a step-down test and the parameters affecting these losses have been determined. The criteria for perforation are formed depending on the total perforation interval length, (along the wellbore), density and diameter of the holes and the proportion by which costs are reduced when performing perforation, taking into account the proposed criteria, is determined.
Bibliography:
1. Ekonomides M., Olini R., Val’ko P. Unifitsirovannyy dizayn gidrorazryva plasta. Ot teorii k praktike / per. s angl.; pod red. A.G. Zagurenko. – Izhevsk: In-t komp’yuternykh issledovaniy, 2007. – 236 s.
2. Romero J., Mack M.G., Elbel J.L. Theoretical Model and Numerical Investigation of Near-Wellbore Effects in Hydraulic Fracturing // Paper presented at the SPE Annual Technical Conference and Exhibition, October 1995, Dallas, Texas. – DOI: 10.2118/30506-MS
3. Merkulov A.A. Impul’snye tekhnologii intensifikatsii i gidrorazryv plasta (chast’ I) // Neft. khoz-vo. – 2007. – № 9. – S. 127–129.
Back to issue