On the Theory of the Method of “Echoscopy” of the Bottomhole Zon e of a Well in a Low-Permeability Formation Subject to Hydraulic Fracturing

R. A. Bashmakov; Башмаков Р. А.; E. V. Galiakbarova; Галиакбарова Э. В.; Z. R. Khakimova; Хакимова З. Р.; V. Sh. Shagapov; Шагапов В. Ш.

doi:10.31857/S0032823523020042

On the Theory of the Method of “Echoscopy” of the Bottomhole Zon e of a Well in a Low-Permeability Formation Subject to Hydraulic Fracturing

Authors: Bashmakov R.A.¹^,2, Galiakbarova E.V.¹^,3, Khakimova Z.R.¹^,3, Shagapov V.S.¹
Affiliations:
1. Mavlutov Institute of Mechanics
2. Ufa University of Science and Technology
3. Ufa State Petroleum Technological University
Issue: Vol 87, No 2 (2023)
Pages: 314-326
Section: Articles
URL: https://rjonco.com/0032-8235/article/view/675168
DOI: https://doi.org/10.31857/S0032823523020042
EDN: https://elibrary.ru/TZACKT
ID: 675168

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Abstract

We build a mathematical model describing the evolution of the pulse signal in the well in the presence of a longitudinal or transverse fracture in the bottomhole section. It is assumed that the signal is sent from the wellhead with a wavelength greater than the diameter of the well and the length of the open section of the well. According to the dynamics of the “echo” of the pulse signal returning to the wellhead, it is possible to judge the quality of hydraulic fracturing. The results of numerical calculations for a bell-shaped pulse are presented. It is shown that when diagnosing fractures, water is more preferable than oil as a fluid through which the signal propagates.

Keywords

pulse signal, hydraulic fracturing, oil well, wave phase, reflection coefficient, harmonic waves

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