Development of oil fields with unconsolidated reservoirs is often accompanied by uncontrolled destruction of the bottom hole formation zone of the reservoir, followed by the removal of solid suspended particles into the wellbore. Traditional methods of combating sand occurrence including the installation of screens, using chemical treatment, changing the profile of the well, etc. are not effective enough. Failure to achieve the design indicators is associated with a significant decrease in the productivity due to the destruction of the reservoir. According to the program No. 2020611693 created by the author, the permissible depression is no more than 0.15 MPa in some cases. The main idea of the approach is to provide scientifically-based controlled sand free production, as well as control of various parameters of the fluid, well and reservoir in order to influence the sand production process and maintain the bottom-hole zone of the formation in a geomechanically stable state. It was found that water and gas saturation of the formation have a multidirectional effect on the process of sand production and the dependences of both the quantity and the granulometric composition of the removed particles on the pressure drop and the saturation of the formation were established as a result of the conducted experiments.

Keywords: sand production, laboratory experiments, reservoir saturation, unconsolidated reservoir, granulometric composition

REFERENCE

Salahi A., Dehghan A.N., Sheikhzakariaee S.J., Davarpanah  A.  Sand production control mechanisms during oil well production and construction. Petroleum Research, 2021, DOI: 10.1016/j.ptlrs.2021.02.005.

Dabirian R. et al. Numerical simulation and modeling of critical sand-deposition velocity for solid/liquid flow. SPE Production and Operations, Vol. 33, No. 4, 2018,  DOI: 10.2118/187049 PA.

Лежнев К. А., Рощектаев А., Пашкин В. Интегрированная модель процесса выноса песка в системе пласт – фильтр – скважина. Российская нефтегазовая техническая конференция SPE. Москва, 2019.

Grigorev M.B., Tananykhin D.S., Poroshin M.A. Sand management approach for a field with high viscosity oil. Journal of Applied Engineering Science, No. 18, 2020, с. 64-69.