STIMULATING FLUIDS BASED ON NGL MIXTURE Russian patent published in 2018 - IPC C09K8/82 C09K8/86 C09K8/94 E21B43/267 E21B35/00 E21B43/00 

FIELD: mining.

SUBSTANCE: invention relates to stimulating fluids for fracturing a hydrocarbon containing formation and system equipment therefor. Stimulating fluid comprises a proppant and a non-fractionated hydrocarbon mixture containing ethane, propane, butane, isobutane and pentane plus, which is a by-product of the demethanized hydrocarbon stream. Stimulating fluid comprises a proppant and a non-fractionated hydrocarbon mixture containing at least one hydrocarbon compound having two carbon atoms (C2), at least one hydrocarbon compound having three carbon atoms (C3), at least one hydrocarbon compound having four carbon atoms (C4), and at least one hydrocarbon compound having five carbon atoms (C5) or more, a non-fractionated representing by-product of the demethanized hydrocarbon stream. NGL-based system includes a source of nitrogen and/or carbon dioxide, a source of a mixture of NGL and a proppant source in fluid communication with a source of nitrogen and/or carbon dioxide, a mixer receiver in fluid communication with a source of NGL mixture and a proppant source, a pump for transferring the stimulating fluid from the mixer receptacle to the wellhead, said medium comprising proppant from a proppant source, said hydrocarbon mixture from a source of a mixture of NGL and at least one of nitrogen and carbon dioxide from a source of nitrogen and / or carbon dioxide, said mixture being a by-product of a demethanized hydrocarbon stream and comprising ethane, propane, butane, isobutane and pentane plus. Method for injecting a stimulating fluid into a hydrocarbon containing production formation comprising mixing the above hydrocarbon mixture, which is not divided into fractions, proppant and at least one substance from nitrogen and carbon dioxide in a mixer receiving a stimulating fluid and injecting said medium into said formation. Emergency system comprises a manifold which is designed with possibility to supply the above-mentioned medium at the wellhead, a remote-controlled emergency valve which is designed with possibility to stop supplying the medium to the wellhead, a manifold spray tube having a plurality of spray nozzles configured to atomize carbon dioxide into the atmosphere near the manifold, and an outlet pipeline in communication with the manifold for discharging said medium from the manifold or a plurality of gas detectors configured to detect combustible gas from the reservoir and in response to this actuation of a remote-controlled emergency valve to stop the supply of said medium to the wellhead. Invention is developed in subclaims.

EFFECT: increase in economy, efficiency and safety of processing.

27 cl, 11 dwg, 1 tbl