The method of regular temperature labels in measuring phase flow rates in low-flow horizontal wells

About the authors:

Marat S. Gayazov, Cand. Sci. (Phys.-Math), Associate Professor, Department of Geophysics, Director of the Innovation Center “Technopark”, Bashkir State University (Ufa); rkuf@yandex.ru

Rim A. Valiullin, Dr. Sci. (Tech.), Professor, Head of the Department of Geophysics, Bashkir State University (Ufa); valra@geotec.ru

Rashid K. Yarullin, Cand. Sci. (Phys.-Math), Associate Professor, Department of Geophysics, Director of the Innovation Center “Technopark”, Bashkir State University (Ufa); rkuf@yandex.ru

Abstract:

This article presents the results of experimental studies of the applicability and range of consumption parameters of the heat tag method for solving practical problems in a horizontal well where an induction heater was used as a heat source. The research was carried out on the certified thermohydrodynamic stand of BSU and in the laboratory of thermometry. The results of the study showed that the method can be applied in a single-phase and two-phase stratified flow with an error of no more than 8%. It was found that the shape and type of the source of the artificial thermoanomaly does not affect the results of measuring local flow rates with an output of the total flow rate. The results of the work defined threshold flow rate (100 m3/day water or light oil for a column of diameter D = 4 ½ꞌꞌ) using an inductor of limited power (P ≈ 1 kW), as well as the requirements to configuration of downhole instruments, providing the possibility of estimating the interval of the phase costs in marginal horizontal wells. The motion front and the evolution of the heat mark along the length of the stand for a stratified horizontal (sub-horizontal) flow consisting of hydraulic oil and process water are demonstrated.

References:

1. Altshul A. D., Kiselev N. P. 1975. Hydraulics and aerodynamics. Fundamentals of fluid mechanics. Textbook for universities. 2^nd edition. Moscow: Stroizdat. 323 pp. [In Russian]

2. Valiullin R. A., Yarullin R. K., Yarullin A. R., Shako V. S., Parshin A. D. 2010. “Development of criteria for allocation of working intervals in low-rate horizontal wells based on physical experiment and well studies”. Russian technical oil and gas conference and exhibition SPE on exploration and production (26-28 October, Moscow, Russia). SPE 136272-RU. DOI: 10.2118/136272-RU [In Russian]

3. Valiullin R. A., Yarullin R. K., Yarullin A. R. 2012. “Testing of downhole equipment on the stand — as a mandatory element of testing when developing and transferring it to production”. Oil and Gas Business, no. 3, pp. 300-308. [In Russian]

4. Gayazov M. S. 2017. “Method of temperature marks for estimating the flow rate and total flow rate in relation to the conditions of operating horizontal wells”. Izvestiya vyshe uchebnykh zavedeniy. Volga region. Natural science, no. 2, pp. 44-55. [In Russian]

5. Gorbachev Yu. I. 1990. Geophysical studies of wells. Textbook for universities. Moscow: Nedra. 400 pp. [In Russian]

6. Yarullin A. R. 2014. “Results of experimental studies of a two-phase stratified flow in a horizontal wellbore with an alternating trajectory”. Nauchno-tekhnicheskij vestnik “Karotazhnik”, no. 243, pp. 72-76. [In Russian]

7. Yarullin R. K., Yarullin A. R., Gayazov M. S. 2019. “The concept of applying the method of temperature marks in horizontal wells in multiphase flow conditions”. PROneft. Professionals about Oil, no. 1 (11), pp. 7-11. [In Russian]

8. Schlumberger Technology Corporation. 2008. Flow Scan Imager (FSI), US Patent 7424366, September 9. http://www.slb.ru/ [In Russian]