METHOD FOR PRODUCING REPRESENTATIVE SAMPLES OF SUPERVISCOUS OIL FROM OIL-SATURATED CORE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC E21B49/00 B03B9/02 

FIELD: oil and gas industry.

SUBSTANCE: drilling a well bore and sampling the core in a potentially productive interval, isolating the sampled core during the sampling process and/or immediately after it. The sample is formed from the well core by isolation of required amount of core material with subsequent disintegration. Plastic cups are filled with core material followed by heating and further placing them in centrifuge suspensions. The fluid contained in the rock is displaced under the action of centrifugal force, in which a centrifuge with a thermostatically controlled working chamber is used. Cleaning of fluid sample extracted from core is performed from fine particles of sedimentary rocks in heated state by gravity separation method. The water-oil emulsion is separated and the fluid is removed from the fluid sample by thermodynamic action. The device comprises a disintegration unit, a centrifuge with a horizontal rotor and suspensions with the possibility of thermal stabilisation of the working area, a thermostatic cabinet, a freezing chamber. The centrifuge suspensions are made for installing the plastic cups with a flat bottom perforated along the side wall at the cup bottom.

EFFECT: increased fluid extraction without chemical action for the subsequent analysis of fractional composition of potentially extracted fluid, improved quality of information on physico-chemical and geological properties of extracted fluid, and reliability of the field exploitation parameters prediction, reduced time for production of representative fluid sample.

2 cl, 2 dwg