Izvorni znanstveni članak
THE PELLETS APPLICATION IN LABORATORY RESEARCHING OF INHIBITIVE MUD/SHALE INTERACTION
Borivoje Pašić
Sažetak
Wellbore instability appears to be a serious problem during drilling process through shale. Shales instability cause basically comes out of its mineralogical composition (especially clay minerals content) and physico-chemical properties. Many research activities about shale instability causes and shale properties (affecting shale behavior during interaction with water phase of different drilling muds) definition have been carried out by now. In these laboratory tests were used original shales samples given by coring process or collecting shale cuttings from shale shakers, and different shale samples from outcrop. From this reason is very difficult compare laboratory tests results given by different authors. Possible solution is use artificial shale samples (pellets) with exact mineralogical composition, enabling extensive laboratory tests and tests results comparison. In this paper presented laboratory tests of pellets swelling in inhibitive muds.
Ključne riječi
wellbore instability; shale; hydration; swelling; inhibitive muds; gypsum mud; saltwater mud and potassium mud
Hrčak ID:
107900
URI
Datum izdavanja:
4.12.2012.
Posjeta: 2.110 *