RESEARCH OF THE INFLUENCE OF DRILLING WASHING FLUIDS ON PRODUCTIVE FORMATIONS OF THE JURASSIC DEPOSITS
UDC: 622.245.3
DOI: 10.33285/0130-3872-2021-1(337)-42-48
Authors:
LIPATOV EVGENY YURIEVICH 1,
KRIVOVA NADEZHDA RASHITOVNA 1,
KURBANOV KHAYDARALI NURALIEVICH 1
1 Tyumen Industrial University, Nizhnevartovsk, Russian Federation
Keywords: drilling fluids, terrigenous rocks, change in permeability
Annotation:
The paper presents the results of studying the impact of drilling washing fluids on terrigenous rocks of one of the fields. When opening and testing productive formations, specialized technical fluids on a water or oil base were used. All of them are characterized by their compatibility in varying degree with the lithological-physical properties of formations of fields in the Western Siberia and have a different effect on the filtration properties of the porous reservoir of productive formations. When using drilling washing fluids made on fresh water, as a result of the interaction of fresh water filtrate with rock cement and some rock-forming minerals, the permeability of the bottomhole formation zone changed. Exposure of drilling washing fluids on core with the exception of FLO-PRO and NaCl, caused some decrease in the permeability of the oil core samples. As a result of the study, it was concluded that technical fluids FLO-PRO and IES can be recommended for use as they do not violate the structure of the reservoir pore space and do not lead to a significant decrease in the oil permeability of the core of all reservoirs.
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