Over the past 20 years, many results of scientific research have been published aimed at studying thermohydrodynamic effects in producing and injection wells in steady and unsteady filtration modes.
These works present the technological features of performing thermohydrodynamic well tests and the methodological basis for processing the results of field studies, which reduce uncertainty in determining the filtration properties of the reservoir and productive parameters of wells, including wells with a complex architecture of shanks. However, the information potential of permanent downhole gauges (PDG) is not limited only to the study of these parameters but allows monitoring of such physical and technological parameters of the oil recovery and production process that are not directly measured by PDG. In particular, when monitoring the development of complex oil fields with contact gas reserves and underlying water, it is important to measure not so much the downhole pressure as to determine its optimal value, preventing the formation of gas and water cones. Obviously, the pressure parameter alone does not provide a solution to this problem. It is necessary to control the integral parameter such as gas factor for determining the required downhole pressure value.
The article considers an algorithm for field development control by an indirect parameter - the gas factor, the value of which is calculated on the basis of measured physical and technological quantities such as pressure, temperature and their change over time. The relevance of this approach results from the complexity of instrumental measurement of GF in field conditions associated with the gas separation pressure above atmospheric pressure and the lack of measurement tools for gas flows with droplet liquid.
1. Ramazanov A.Sh. et al., Thermal modeling for characterization of near wellbore zone and zonal allocation (In Russ.), SPE-136256-MS, 2010, https://doi.org/10.2118/136256-MS
2. Sadretdinov A.A., Neizotermicheskaya fil'tratsiya szhimaemogo flyuida v sisteme skvazhina – plast (Non-isothermal filtration of compressible fluid in the well-reservoir system): thesis of candidate of physical and mathematical science, Ufa, 2011.
3. Ramazanov A.Sh., Teoreticheskie osnovy skvazhinnoy termometrii (Theoretical foundations of downhole thermometry), Ufa: Publ. of BashSU, 2017, 112 p., URL: https://elib.bashedu.ru/dl/read/Ramazanov_Teoreticheskie osnovy skvazhinnoj termometrii_up_2017.pdf.
4. Pityuk Yu.A., Davletbaev A.Ya., Musin A.A. et al., Estimation of various temperature effects influencing temperature change near bottomhole formation zone (In Russ.), Nauchno-tekhnicheskiy vestnik OAO “NK “Rosneft'”, 2016, no. 1, pp. 28-34.
5. Fatikhov S.Z., Gimaev A.F., Fedorov V.N., Using of thermal-hydrodynamic methods of layers research in the fields in the Republic of Bashkortostan (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2020, no. 1, pp. 56–59, DOI: 10.24887/0028-2448-2020-1-56-59
6. Ponomarev A.I., Zaripova K.R., Numerical calculation of unsteady nonisothermal gasflow (In Russ.), Neftegazovoe delo, 2013, no. 3, pp. 228–262, URL: http://ogbus.ru/files/ogbus/authors/PonomarevAI/PonomarevAI_2.pdf