Abstract: Methods for servicing a hydrocarbon well using natural gas in a well intervention operation can include preparing a working fluid having a composition comprising natural gas between about 5 mol % to about 100 mol %. During a well intervention operation at the specified well intervention conditions, the method can include injecting the working fluid into the well and contacting the working fluid with the recovery target material such that at least some of the natural gas dissolves into the recovery target material and forming a liquid phase well servicing mixture of the natural gas and recovery target material. At least some of the well servicing mixture can be recovered at surface.

Abstract: Methods for servicing a hydrocarbon well using natural gas in a well intervention operation can include preparing a working fluid having a composition containing about 10 wt % to 100 wt % of a gas phase natural gas, where the quantity and composition of the natural gas is selected so that under specified well intervention conditions, the natural gas and a liquid phase recovery target material form a mixture in the condensing vapor-gas or vapor-gas part of the mixture's phase envelope. During the well intervention operation and at the specified well intervention conditions, the method can include injecting the working fluid into the well, contacting the working fluid with the liquid phase recovery target material, vaporizing the recovery target material, and forming a homogeneous gas phase well mixture of the recovery target material and natural gas. At least a portion of the homogenous gas phase well mixture can be recovered at surface.

Abstract: Methods for servicing a hydrocarbon well using natural gas are provided. The method can include preparing a working fluid comprising about 5 vol % to about 100 vol % of natural gas. A quantity of the natural gas in the working fluid can be sufficient to form a heterogeneous phase well servicing mixture of a gaseous phase natural gas and a solid or liquid phase recovery target material under specified well intervention conditions. During the well servicing operation and under the specified well intervention conditions, the working fluid can be injected into the well and mixing the working fluid with the recovery target material in the well to form the heterogeneous phase well servicing mixture. The natural gas can be in a gas phase and can serve as a carrier fluid for the recovery target material. At least a portion of the heterogeneous phase well servicing mixture can be recovered at surface.

Abstract: Methods for servicing a hydrocarbon well using natural gas in a well intervention operation can include preparing a working fluid having a composition comprising natural gas between about 5 mol % to about 100 mol %. During a well intervention operation at the specified well intervention conditions, the method can include injecting the working fluid into the well and contacting the working fluid with the recovery target material such that at least some of the natural gas dissolves into the recovery target material and forming a liquid phase well servicing mixture of the natural gas and recovery target material. At least some of the well servicing mixture can be recovered at surface.

Abstract: A vaporizer apparatus for vaporizing liquefied natural gas (LNG) into vapor-phase natural gas for injection into an oil or gas well, comprises a blower assembly, a burner section, a heat exchanger section, and at least one flammable gas concentration sensor. The blower assembly comprises a primary blower configured to move air along an air flow path through the vaporizer apparatus and a flame arrestor configured to allow passage of the air into the vaporizer apparatus and impede passage of a flame out of the vaporizer apparatus. The burner section comprises an enclosure having an upstream end coupled to the blower assembly and a downstream end, and a burner inside the enclosure and in the air flow path for heating the air.

Abstract: Methods for servicing a hydrocarbon well using natural gas in a well intervention operation can include preparing a working fluid having a compositiion containing about 10 wt % to 100 wt % of a gas phase natural gas, where the quantity and composition of the natural gas is selected so that under specified well intervention conditions, the natural gas and a liquid phase recovery target material form a mixture in the condensing vapor-gas or vapor-gas part of the mixture's phase envelope. During the well intervention operation and at the specified well intervention conditions, the method can include injecting the working fluid into the well, contacting the working fluid with the liquid phase recovery target material, vaporizing the recovery target material, and forming a homogeneous gas phase well mixture of the recovery target material and natural gas. At least a portion of the homogenous gas phase well mixture can be recovered at surface.

Abstract: Methods for servicing a hydrocarbon well using natural gas are provided. The method can include preparing a working fluid comprising about 5 vol % to about 100 vol % of natural gas. A quantity of the natural gas in the working fluid can be sufficient to form a heterogeneous phase well servicing mixture of a gaseous phase natural gas and a solid or liquid phase recovery target material under specified well intervention conditions. During the well servicing operation and under the specified well intervention conditions, the working fluid can be injected into the well and mixing the working fluid with the recovery target material in the well to form the heterogeneous phase well servicing mixture. The natural gas can be in a gas phase and can serve as a carrier fluid for the recovery target material. At least a portion of the heterogeneous phase well servicing mixture can be recovered at surface.

Abstract: A vaporizer apparatus for vaporizing liquefied natural gas (LNG) into vapor-phase natural gas for injection into an oil or gas well, comprises a blower assembly, a burner section, a heat exchanger section, and at least one flammable gas concentration sensor. The blower assembly comprises a primary blower configured to move air along an air flow path through the vaporizer apparatus and a flame arrestor configured to allow passage of the air into the vaporizer apparatus and impede passage of a flame out of the vaporizer apparatus. The burner section comprises an enclosure having an upstream end coupled to the blower assembly and a downstream end, and a burner inside the enclosure and in the air flow path for heating the air.

Abstract: A method for fracturing a downhole formation, includes: preparing an energized fracturing fluid including mixing gaseous natural gas and a fracturing base fluid in a mixer; injecting the energized fracturing fluid through a wellhead and into a well; and continuing to inject the energized fracturing fluid until the formation is fractured. An apparatus for generating an energized fracturing fluid for use to fracture a downhole formation, the apparatus includes: a fracturing base fluid source; a natural gas source; and a mixer for accepting natural gas from the natural gas source and fracturing base fluid from the fracturing base fluid source and mixing the natural gas and the fracturing base fluid to generate the energized fracturing fluid.

Abstract: A method for fracturing a downhole formation, includes: preparing an energized fracturing fluid including mixing gaseous natural gas and a fracturing base fluid in a mixer; injecting the energized fracturing fluid through a wellhead and into a well; and continuing to inject the energized fracturing fluid until the formation is fractured. An apparatus for generating an energized fracturing fluid for use to fracture a downhole formation, the apparatus includes: a fracturing base fluid source; a natural gas source; and a mixer for accepting natural gas from the natural gas source and fracturing base fluid from the fracturing base fluid source and mixing the natural gas and the fracturing base fluid to generate the energized fracturing fluid.

Abstract: A fracturing fluid mixture is used to hydraulically fracture underground formations in a reservoir, by mixing at least natural gas and a base fluid to form the fracturing fluid mixture, and injecting the fracturing fluid mixture into a well. Within the fracturing fluid mixture, the natural gas composition and content are selected such that a recovered gas component of a well stream is within the inlet specification of an existing gas processing facility, and the well stream has a wellhead flowing pressure that is sufficient to flow the well stream to surface, or have a flowing pressure that meets capture system inlet pressure requirements of the processing facility. The wellhead flowing pressure or the flowing pressure at the capture system inlet can be increased by adding natural gas to the fracturing fluid, which has the effect of reducing the bottom hole flowing pressure.

Abstract: A fracturing fluid mixture is used to hydraulically fracture underground formations in a reservoir, by mixing at least natural gas and a base fluid to form the fracturing fluid mixture, and injecting the fracturing fluid mixture into a well. Within the fracturing fluid mixture, the natural gas composition and content are selected such that a recovered gas component of a well stream is within the inlet specification of an existing gas processing facility, and the well stream has a wellhead flowing pressure that is sufficient to flow the well stream to surface, or have a flowing pressure that meets capture system inlet pressure requirements of the processing facility. The wellhead flowing pressure or the flowing pressure at the capture system inlet can be increased by adding natural gas to the fracturing fluid, which has the effect of reducing the bottom hole flowing pressure.

Abstract: A method for fracturing a downhole formation, includes: preparing an energized fracturing fluid including mixing gaseous natural gas and a fracturing base fluid in a mixer; injecting the energized fracturing fluid through a wellhead and into a well; and continuing to inject the energized fracturing fluid until the formation is fractured. An apparatus for generating an energized fracturing fluid for use to fracture a downhole formation, the apparatus includes: a fracturing base fluid source; a natural gas source; and a mixer for accepting natural gas from the natural gas source and fracturing base fluid from the fracturing base fluid source and mixing the natural gas and the fracturing base fluid to generate the energized fracturing fluid.

Abstract: A method for fracturing a formation in a reservoir uses a fracturing fluid mixture comprising natural gas and a base fluid. The method comprises: determining certain reservoir conditions of the reservoir comprising the formation; selecting at least one desired behavior of the fracturing fluid mixture during a fracturing operation in the formation under the determined reservoir conditions; determining properties of the fracturing fluid mixture required to achieve the selected at least one behavior, preparing the fracturing fluid mixture having the determined properties; and injecting the fracturing fluid mixture into the reservoir under the determined reservoir conditions, such that the mixture exhibits the desired behavior during the fracturing operation. The determined properties include a mole fraction of natural gas in the mixture.

Abstract: A method for fracturing a downhole formation, includes: preparing an energized fracturing fluid including mixing gaseous natural gas and a fracturing base fluid in a mixer; injecting the energized fracturing fluid through a wellhead and into a well; and continuing to inject the energized fracturing fluid until the formation is fractured. An apparatus for generating an energized fracturing fluid for use to fracture a downhole formation, the apparatus includes: a fracturing base fluid source; a natural gas source; and a mixer for accepting natural gas from the natural gas source and fracturing base fluid from the fracturing base fluid source and mixing the natural gas and the fracturing base fluid to generate the energized fracturing fluid.

Abstract: A method for fracturing a downhole formation, includes: preparing an energized fracturing fluid including mixing gaseous natural gas and a fracturing base fluid in a mixer; injecting the energized fracturing fluid through a wellhead and into a well; and continuing to inject the energized fracturing fluid until the formation is fractured. An apparatus for generating an energized fracturing fluid for use to fracture a downhole formation, the apparatus includes: a fracturing base fluid source; a natural gas source; and a mixer for accepting natural gas from the natural gas source and fracturing base fluid from the fracturing base fluid source and mixing the natural gas and the fracturing base fluid to generate the energized fracturing fluid.

Abstract: A method for fracturing a downhole formation, includes: preparing an energized fracturing fluid including mixing gaseous natural gas and a fracturing base fluid in a mixer; injecting the energized fracturing fluid through a wellhead and into a well; and continuing to inject the energized fracturing fluid until the formation is fractured. An apparatus for generating an energized fracturing fluid for use to fracture a downhole formation, the apparatus includes: a fracturing base fluid source; a natural gas source; and a mixer for accepting natural gas from the natural gas source and fracturing base fluid from the fracturing base fluid source and mixing the natural gas and the fracturing base fluid to generate the energized fracturing fluid.

Abstract: A method for fracturing a formation in a reservoir using a fracturing fluid mixture comprising natural gas and a base fluid, comprises: determining certain reservoir conditions of the reservoir comprising the formation; selecting at least one desired behaviour of the fracturing fluid mixture during a fracturing operation in the formation under the determined reservoir conditions; determining properties of the fracturing fluid mixture required to achieve the selected at least one behaviour, wherein the determined properties includes a mole fraction of natural gas in the mixture; preparing the fracturing fluid mixture having the determined properties; and injecting the fracturing fluid mixture into the reservoir under the determined reservoir conditions, such that the mixture exhibits the desired behaviour during the fracturing operation.