Abstract: A simple, applicable in the field, and extra-equipment free method is provided for determining steam dryness directly in a thermal recovery of high-viscosity oil. A non-condensable gas is added into a saturated steam being injected into a well. The presence of non-condensable gas changes partial steam pressure. Correspondingly the steam condensation temperature also changes. The borehole temperature or pressure measurements can be used to evaluate the steam dryness.

Abstract: A method of determining a permeability profile of a heavy-oil bearing formation includes pre-heating of the formation by circulation of steam in a well, creating an excessive pressure inside the well during the pre-heating stage, stopping circulation of steam in the well, measuring temperature along a well bore of the well using distributed temperature sensors, wherein the measuring is performed from a moment at which steam circulation stops until a thermally stable condition is achieved, creating a conductive heat exchange model relating a quantity of steam penetrated into the formation to a local permeability of the formation, the model being created using the temperature measurement results of the pre-heating stage for solving an inverse problem, and determining the formation permeability profile from the created model.

Abstract: This invention relates to the oil and gas industry, more specifically, to the development of heavy oil and asphaltic bitumen deposits. The method of determining the filtration properties of rocks comprises providing contrasting temperature fluid circulation in the well; supplying the fluid is in the quantity required for partial fluid absorption in the annulus; stopping fluid circulation in the well; measuring temperature along the well bore as from circulation stoppage and until the achievement of a thermally stable condition; obtaining a temperature vs time curve along the well bore; determining the filtration properties of rocks using a data averaging model. Fluid viscosity is modified by chemical additives for non-horizontal wells.

Abstract: The present invention provides an easy, field applicable, and extra-equipment method for determining steam dryness directly under thermal high-viscosity oil stimulation. The technical effect is achieved by adding the gas non-condensed in a well under flooding to the saturated steam pumpdown. The non-condensed gas occurrence of the mixture will vary partial steam pressure. In doing so, the steam condensation temperature will vary too. The borehole temperature or pressure measurements can be used to evaluate the steam dryness.