Abstract: A system and method for quantifying zonal flow in a multi-lateral well, including providing a first taggant through a first dosing tubing to a first lateral in a wellbore of the multi-lateral well, providing a second taggant through a second dosing tubing to a second lateral in the wellbore, flowing a first produced fluid from a subterranean formation via the first lateral into production tubing, flowing a second produced fluid including from the subterranean formation via the second lateral into the production tubing, flowing a produced stream including the first produced fluid and the second produced fluid uphole through the production tubing and discharging the produced stream from the wellbore, and analyzing the produced stream to measure an amount of the first taggant in the produced stream and an amount of the second taggant in the produced stream, wherein the first taggant and the second taggant are water soluble.

Abstract: A method of preparing an enhanced oil recovery composition is described. The method includes carbonizing a waste plastic material to provide carbon microparticles, functionalizing the carbon microparticles with a SO3-containing gas such that the carbon microparticles have a hydrophilic surface, and grinding the carbon microparticles to provide carbon nanoparticles. The carbon nanoparticles have a hydrophilic surface and a hydrophobic surface. A method of enhanced oil recovery is also described.

Abstract: The disclosure relates to systems and methods to determine partition coefficients between crude oil and an aqueous phase for oil and gas tracers. The systems and methods include a microfluidic mixing chip to mix the crude oil and aqueous phase, an oil/water separation tube capable of separating the oil and aqueous phases, and a high-performance liquid chromatography (HPLC) system with optical detection to collect tracer concentration data to determine the partition coefficients.

Abstract: The disclosure features methods of analyzing a fluid extracted from a reservoir, the methods including introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time t0, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t1>t0, where t1?t0 is greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.

Abstract: A method of preparing an enhanced oil recovery composition includes carbonizing a biomass waste material to provide carbon microparticles, functionalizing the carbon microparticles with a SO3-containing gas such that the carbon microparticles include a hydrophilic surface, and grinding the carbon microparticles to provide carbon nanoparticles. The carbon nanoparticles include a hydrophilic surface and a hydrophobic surface. A method of enhanced oil recovery includes introducing an enhanced oil recovery composition including a carbon nanoparticle functionalized with a SO3-containing gas and including a hydrophilic and hydrophobic surface into a hydrocarbon-bearing formation. The method includes displacing hydrocarbons from the hydrocarbon-bearing formation and recovering the hydrocarbons.

Abstract: A method of preparing an enhanced oil recovery composition is described. The method includes carbonizing a waste plastic material to provide carbon microparticles, functionalizing the carbon microparticles with a SO3-containing gas such that the carbon microparticles have a hydrophilic surface, and grinding the carbon microparticles to provide carbon nanoparticles. The carbon nanoparticles have a hydrophilic surface and a hydrophobic surface. A method of enhanced oil recovery is also described.

Abstract: A method of preparing an enhanced oil recovery composition includes carbonizing a biomass waste material to provide carbon microparticles, functionalizing the carbon microparticles with a SO3-containing gas such that the carbon microparticles include a hydrophilic surface, and grinding the carbon microparticles to provide carbon nanoparticles. The carbon nanoparticles include a hydrophilic surface and a hydrophobic surface. A method of enhanced oil recovery includes introducing an enhanced oil recovery composition including a carbon nanoparticle functionalized with a SO3-containing gas and including a hydrophilic and hydrophobic surface into a hydrocarbon-bearing formation. The method includes displacing hydrocarbons from the hydrocarbon-bearing formation and recovering the hydrocarbons.

Abstract: The disclosure features methods of analyzing a fluid extracted from a reservoir, the methods including introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time t0, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t1>t0, where t0?t0 is greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.

Abstract: The disclosure features methods of analyzing a fluid extracted from a reservoir, the methods including introducing a first composition featuring a first complexing agent into a reservoir at a first location, extracting a fluid from the reservoir at a second location different from the first location, combining the fluid with a second composition featuring a concentration of a lanthanide ion to form a third composition featuring a concentration of a complex formed by the first complexing agent and the lanthanide ion, exposing a quantity of the complex to electromagnetic radiation for a first time period ending at a time t0, detecting fluorescence emission from the quantity of the complex for a second time period starting at a time t1>t0, where t1?t0 is greater than 2 microseconds, and determining information about a fluid flow path between the first location and the second location.

Abstract: Compositions and methods for determining the origin location of a subterranean sample are provided. Compositions include a nanoparticle tag including a superparamagnetic iron oxide core, an intermediate layer including a fluorescent dye, and a polymer shell. The nanoparticles can be synthesized by functionalizing a superparamagnetic iron oxide nanoparticle core and covalently bonding a fluorescent dye to the functionalized nanoparticle core. In some implementations, a polymer is covalently bonded to the functionalized, fluorescent superparamagnetic iron oxide nanoparticle core. The nanoparticle tag can be used to determine the origin location of a subterranean sample by mixing the nanoparticle tag into a fluid, flowing the fluid into a subterranean formation, recovering subterranean samples from the subterranean formation, and separating tagged samples from untagged samples using a magnet.

Abstract: A method of treating a subsurface formation with a coated proppant includes introducing the first hydraulic fracturing composition into a wellbore and the subsurface formation through a first zone of the plurality of zones of the subsurface formation; propagating at least one subsurface fracture in the first zone with the first hydraulic fracturing composition, and wherein the hydraulic fracturing composition includes a fluid medium and a first coated proppant dispersed within the fluid medium, the first coated proppant including: a particulate substrate; a first polymeric layer surrounding the particulate substrate, the first polymeric layer including a first chemical additive; and a second polymeric layer surrounding the first polymeric layer, the second polymeric layer including a first chemical tracer, the first chemical tracer including barcoded degradable polymers, fluorescent dyes, quantum dot nanoparticles, paramagnetic nanoparticles, up-conversion phosphors, long-persistent phosphors, or time-resolve

Abstract: A coated proppant including a particulate substrate, a first polymeric layer surrounding the particulate substrate, and a second polymeric layer surrounding the first polymeric layer. The first polymeric layer may include chemical additives. The second polymeric layer may include chemical tracers. The chemical tracers include barcoded degradable polymers, fluorescent dyes, quantum dot nanoparticles, superparamagnetic nanoparticles, up-conversion phosphors, long-persistent phosphors, time-resolved fluorescence resonance energy transfer polymer-nanoparticles (TR-FRET), or combinations thereof.

Abstract: Optical properties of a tracer in water are measured at varying concentrations. A reference curve is built based on the measured optical properties at varying concentrations. An emulsion is mixed with the tracer. The emulsion is demulsified into an oil component and an aqueous component. Optical properties of one of the components are measured. A partition coefficient is determined based on the measured optical properties of a demulsified component and the reference curve.

Abstract: A method of quantifying zonal flow in a multi-lateral well is described. A first taggant is flowed to a first lateral, and a second taggant is flowed to a second lateral. A first produced fluid that includes the first taggant is flowed from the first lateral into a production tubing. A second produced fluid that includes the second taggant is flowed from the second lateral into the production tubing. A produced stream including the first produced fluid and the second produced fluid is flowed uphole through the production tubing. An amount of the first taggant and an amount of the second taggant in the produced stream are measured. Production of fluid from the multi-lateral well proceeds without ceasing throughout the method.

Abstract: Optical properties of a tracer in water are measured at varying concentrations. A reference curve is built based on the measured optical properties at varying concentrations. An emulsion is mixed with the tracer. The emulsion is demulsified into an oil component and an aqueous component. Optical properties of one of the components are measured. A partition coefficient is determined based on the measured optical properties of a demulsified component and the reference curve.

Abstract: A method of preparing an enhanced oil recovery composition is described. The method includes carbonizing a biomass waste material to provide carbon microparticles. The method includes functionalizing the carbon microparticles through an acid treatment such that the carbon microparticles have a hydrophilic surface. The method further includes grinding the carbon microparticles to provide carbon nanoparticles, where the carbon nanoparticles have a hydrophilic surface and a hydrophobic surface. A method of enhanced oil recovery is also described.

Abstract: Devices for chemical analysis include a first separation element formed on the substrate, the first separation element having a wicking surface that separates water from hydrocarbons in a fluid sample, a hydrophobic barrier at least partially surrounding the first separation element, a second separation element fluidically connected the first separation element, the second separation element configured to trap salts and organic matter present in the fluid sample, and a detection element fluidically connected to the second separation element, the detection element having a surface that binds with one or more analytes that may be present in the fluid sample and thereby emits a signal that is capable of being optically detected by a detector. Methods include providing such a device for chemical analysis, placing the fluid sample on the first separation element, and detecting the signal emitted by the detection element.

Abstract: The disclosure relates to compositions, methods and systems that include gel particles that include a tag. The gel particles can be used to label drill cuttings generated during a drilling operation.

Abstract: A method for reducing condensate in a subsurface formation is disclosed. The method includes introducing a reactive mixture including an aqueous solution, urea, dopamine, a silica nanoparticle precursor, a silane grafting compound, and an alcohol compound into the subsurface formation. The method also includes allowing generation of ammonia through thermal decomposition of the urea and allowing the silica nanoparticle precursor to hydrolyze, thereby forming silica nanoparticles. The method further includes allowing the silane grafting compound to graft onto the silica nanoparticles, thereby forming functionalized silica nanoparticles. The method also includes allowing polymerization of the dopamine, thereby forming polydopamine. The method also includes allowing the functionalized silica nanoparticles to attach to the subsurface formation via the polydopamine, thereby reducing condensate in the subsurface formation.

Abstract: A system and method for quantifying zonal flow in a multi-lateral well, including providing a first taggant through a first dosing tubing to a first lateral in a wellbore of the multi-lateral well, providing a second taggant through a second dosing tubing to a second lateral in the wellbore, flowing a first produced fluid from a subterranean formation via the first lateral into production tubing, flowing a second produced fluid including from the subterranean formation via the second lateral into the production tubing, flowing a produced stream including the first produced fluid and the second produced fluid uphole through the production tubing and discharging the produced stream from the wellbore, and analyzing the produced stream to measure an amount of the first taggant in the produced stream and an amount of the second taggant in the produced stream, wherein the first taggant and the second taggant are water soluble.