Fluid FOR DELIVERY OF OIL REAGENT AND METHODS FOR USE IN TARGETED DELIVERY AGENTS oilfield in underground hydrocarbon reservoirs and Methods of tracing the flow of fluids

摘要

Describes a fluid for the delivery of oil field reagent, containing a mixture of base fluid and microcapsules (1, 10, 11, 13, 14, 15), which have oil field reagent contained within the microcapsule. Chemical groups on the outer surface of the microcapsules interact with the base fluid and contribute to the dispersibility of the microcapsules in the base fluid. The chemical groups on the outer surface of the microcapsules interact with the target areas of the hydrocarbon reservoir and enhance the substantivity of the microcapsules to the target areas of the collector. Fluid medium for delivering oil field reagent is supplied to introduce microcapsules to the desired location inside the well and / or reservoirs using properties such as density of microcapsules. Described are methods for producing fluids for delivering oil field reagent, systems containing fluids for delivering oil field reagent, methods for fracturing rocks in a reservoir and tracing the movement of fluid in a hydrocarbon reservoir using these fluids.