Abstract: An elongate, horizontally level, pipe includes a circumferential wall. The pipe flows, within the circumferential wall, process fluid that includes a first fluid and a second fluid immiscible with the first fluid. The first fluid and the second fluid are separated by an interfacial layer. Heating coils are disposed within the pipe. Each heating coil passes through an interior region of the pipe between the circumferential wall at a respective height from a bottom of the pipe. The heating coils generate heat. A controller is connected to the heating coils. The controller triggers at least one of the heating coils that is nearest to a location of the interfacial layer within the interior region to apply heat to the interfacial layer. The heat is sufficient to at least partially demulsify the interfacial layer.

Abstract: A sample is placed in a sample housing. The sample includes crude oil and a demulsifier. A cylindrical sensor is submerged in the sample within the sample housing. An external surface of the cylindrical sensor includes a fluoropolymer. A plurality of densities of the sample are measured by a computer for a corresponding plurality of time points over a specified testing time duration. The computer is communicatively coupled to the cylindrical sensor. The plurality of densities and the corresponding plurality of times points are recorded by the computer. An emulsion breaking efficiency of the demulsifier is determined based on the recorded plurality of densities and corresponding plurality of time points.

Abstract: A method is implemented to determine a concentration of oil in a water sample. A specified amount of cyclohexane is added to the water sample to form a mixture. The mixture is stirred. An oil phase is extracted from the mixture. An absorbance value of the extracted oil phase is measured at a specified wavelength in the visible light spectrum. The specified wavelength is in a range of from 390 nanometers (nm) to 600 nm. The concentration of oil in the water sample is determined based on the measured absorbance value of the extracted oil phase.

Abstract: Systems and methods for providing steam to crude prior to the crude reaching a gas oil separation plant (GOSP). The steam can help separate water and/or salt from the crude by breaking emulsions.

Abstract: A method and a system for separating an oil-in-water emulsion in a water-oil separation plant (WSOP) are provided. An exemplary method includes feeding the oil-in-water emulsion to the WSOP, and forcing the oil-in-water emulsion through a silica sand filter to separate the oil and form a separated water stream.

Abstract: A method is implemented to determine a concentration of oil in a water sample. A specified amount of cyclohexane is added to the water sample to form a mixture. The mixture is stirred. An oil phase is extracted from the mixture. An absorbance value of the extracted oil phase is measured at a specified wavelength in the visible light spectrum. The specified wavelength is in a range of from 390 nanometers (nm) to 600 nm. The concentration of oil in the water sample is determined based on the measured absorbance value of the extracted oil phase.

Abstract: A drag reducing efficiency test is performed on a sample. The sample includes a crude-oil based fluid and a drag reducing agent. The sample is placed within an inner volume defined by a sample housing. A sensing portion of a sensor is submerged in the sample within the sample housing. The sensor includes a disk (sensing portion) and a supporting rod. A lid is placed on the sample housing to isolate the sample within the inner volume. The sensor is coupled to an air bearing motor. The sensor is rotated by the air bearing motor at a plurality of shear rates. For each shear rate, the sensor measures a torque applied by the sample on the disk in response to the disk rotating while submerged in the respective sample at the respective shear rate.

Abstract: A sample is placed in a sample housing. The sample includes crude oil and a demulsifier. A cylindrical sensor is submerged in the sample within the sample housing. An external surface of the cylindrical sensor includes a fluoropolymer. A plurality of densities of the sample are measured by a computer for a corresponding plurality of time points over a specified testing time duration. The computer is communicatively coupled to the cylindrical sensor. The plurality of densities and the corresponding plurality of times points are recorded by the computer. An emulsion breaking efficiency of the demulsifier is determined based on the recorded plurality of densities and corresponding plurality of time points.

Abstract: Tools, methods, and systems for evaluating a demulsifier performance from an emulsion mixture are described. The systems include a measuring instrument including a body with an open end, a cover attachable to the body, a sample holder sized to hold the emulsion mixture and to be received inside the body, the body and the cover define a sealable chamber; a sensor system positioned inside the sealable chamber an environmental control system positioned to enclose the sealable chamber; a data acquisition and processing system is in electronic communication with the sealable chamber, the sensor system, and the environmental control system. The sensor system includes a handle attached to and extruding from the cover of the measuring instrument; and a sensor loaded onto the handle, sized to be submerged inside the emulsion mixture of the sample holder, and operable to measure performance of the demulsifier.

Abstract: Systems and methods for evaluating a drag reducing agent's performance in a mixture are described. The system includes a measuring instrument with an rheometer; and a sensor system positioned inside the measuring instrument including a body with an open end and an extended end, wherein the extended end is directly attached to the measuring instrument; a cover with an inner disc and an outer disc and attachable to the body, the inner disc sized to be received by the open end of the body; the body and the cover form a sealable chamber; and a rotating disc with a bar and a plate, the bar is attached to the measuring instrument and the plate is positioned inside the body and operable to measure drag reducing agent's performance of the mixture; and a data acquisition and processing system is in electronic communication with the measuring instrument, and the sensor system.

Abstract: A system and method for a gas oil separation plant (GOSP) that receives crude oil from a wellhead. The GOSP has a sand filter associated with a water-oil separator vessel that removes crude oil from oily water in the GOSP. The sand filter is a filter having sand as filter media.

Abstract: A production stream from a well formed in a subterranean formation is flowed to a gas oil separation unit. The gas oil separation unit includes a separator vessel. The production stream includes an emulsion including an oil phase and an aqueous phase. Steam is mixed with the production stream prior to the production stream entering the separator vessel. Phases of the production stream are separated by the separator vessel to produce a vapor stream, an aqueous stream, and an oil stream.

Abstract: An elongate, horizontally level, pipe includes a circumferential wall. The pipe flows, within the circumferential wall, process fluid that includes a first fluid and a second fluid immiscible with the first fluid. The first fluid and the second fluid are separated by an interfacial layer. Heating coils are disposed within the pipe. Each heating coil passes through an interior region of the pipe between the circumferential wall at a respective height from a bottom of the pipe. The heating coils generate heat. A controller is connected to the heating coils. The controller triggers at least one of the heating coils that is nearest to a location of the interfacial layer within the interior region to apply heat to the interfacial layer. The heat is sufficient to at least partially demulsify the interfacial layer.

Abstract: An elongate, horizontally level, pipe includes a circumferential wall. The pipe flows, within the circumferential wall, process fluid that includes a first fluid and a second fluid immiscible with the first fluid. The first fluid and the second fluid are separated by an interfacial layer. Heating coils are disposed within the pipe. Each heating coil passes through an interior region of the pipe between the circumferential wall at a respective height from a bottom of the pipe. The heating coils generate heat. A controller is connected to the heating coils. The controller triggers at least one of the heating coils that is nearest to a location of the interfacial layer within the interior region to apply heat to the interfacial layer. The heat is sufficient to at least partially demulsify the interfacial layer.