Published May 2020, Pg. 26-29

Section: Well drilling

UOT: 622.276:658.58

DOI: 10.37474/0365-8554/2020-5-26-29

Prevention of rock sloughing via directing osmotic pressure to the well wall

J.S. Akhundov

T.E. Guluzadeh

The boreholes of the wells drilled for increasing oil and gas production sometimes come across near the zones of tectonic faults or small rocks. The reduction of molecular adhesion between the fractured, poor solidity and moved away small rock particles comprising well wall and drilling mud filtration in the intervals of fragmented particles at the same time is the reason for constant sloughing of rock particles from the well wall into the borehole. The rock particles separated from well wall and falling into the wellbore are continuously accumulated in the wellbore, which is the reason for intractable complications and sometimes failure occurrence. As a result of conducted studies, it has been defined that sloughing of rock particles from well walls may be prevented directing osmotic pressure to the well wall.