摘要:
The present invention relates to the development of tracer fluids, more generally, that of aqueous liquids, intended to be injected under pressure in an oil reservoir, for example from an injection well up to a production well.The object of the invention is to propose a new method of study of a solid medium, i.e. an oil reservoir, by diffusion of a liquid (i.e. injection waters) containing tracers, through said solid medium, which is simple to implement and economical and which remedies the drawbacks of the known tracers for injection waters of oil reservoirs.This method essentially consisting of injecting, in this solid medium, an injection liquid comprising a nanoparticle-based tracer having average dimensions comprised between 20 and 200 nm, detectable by means of one or several S signals at dilutions of less than or equal to 10−7, adapted to form a stable colloidal suspension in a saline medium, at least a portion of which is constituted of a core and a coating provided with an adjustable hydrophilic-lipophilic balance (HLB) and comprising at least one organic and/or organosilicon component; recovering the liquid having diffused; and analyzing this liquid having diffused to measure the quantity of tracer by detection of the signal or signals S.
摘要:
A family of organic tracers is proposed for inter-well measurement of residual oil in petroleum reservoirs, as is their use as partitioning tracers in a petroleum reservoir. The tracers consist of at least one benzyl alcohol of formula i) wherein each of R1 to R5 is independently selected from H, F, CI, Br, I, CF3 CF2CI, CFCI2 and CCI3 and wherein at least one of R1 to R5 is not H.
摘要:
Some embodiments relate to a method for producing, from sulfur-rich type IIs kerogen, a sweetened synthetic crude having a sulfur concentration of at most 1% wt/wt, a nitrogen concentration of at most 0.2% wt/wt and an API gravity of at least 30°. Hydrotreating is performed under only low-severity conditions of at most about 350 degrees Celsius and a maximum pressure of at most 120 atmospheres. In some embodiments, the feedstock to the hydrotreater comprises hydrocarbon pyrolysis liquids generated primarily by low temperature pyrolysis of the sulfur-rich type IIs kerogen. For example, the feedstock may be rich in easier-to-hydrotreat heterocyclic species. In some embodiments, it is possible to optimize the pyrolysis process by monitoring relative concentrations of the easier-to-hydrotreat heterocyclics and the harder-to-treat heterocyclics.
摘要:
A method of treating a formation containing crude oil with specific solubility groups and chemical families is described. The method includes (a) providing a hydrocarbon recovery composition to at least a portion of a formation containing crude oil with specific solubility groups and chemical families, wherein the composition comprises a C24-28 internal olefin sulfonate; and (b) allowing the composition to interact with hydrocarbons in the crude oil containing formation.
摘要:
Aqueous treating fluids may include a viscoelastic surfactant (VES) and an aqueous base fluid, e.g. a drilling fluid, whereby the VES may increase and/or maintain the viscosity of the aqueous treating fluid. Metal ions may be present within the aqueous treating fluid that break, reduce, and/or digest the VES within the aqueous treating fluid. An effective amount of complexation particles may be added to the aqueous treating fluid for complexing at least a portion of these metal ions and thereby disallowing the metal ions from breaking, reducing, and/or altering the VES within the aqueous treating fluid.
摘要:
Provided herein are, inter alia, compositions including a surfactant and a novel compound useful in enhanced oil recovery. The compositions and methods provided herein may be particularly useful for oil recovery under a broad range of reservoir conditions (e.g. high to low temperatures, high to low salinity, highly viscous oils).
摘要:
A method of extracting hydrocarbon-containing organic matter from a hydrocarbon-containing material includes the steps of providing a first liquid comprising a turpentine liquid; contacting the hydrocarbon-containing material with the turpentine liquid to form an extraction mixture; extracting the hydrocarbon material into the turpentine liquid; and separating the extracted hydrocarbon material from a residual material not extracted.
摘要:
Injecting an enhanced oil recovery (EOR) agent into a subterranean formation in at least one injection interval of a hydrocarbon well extending into the subterranean formation, then producing fluid from the formation from at least one production interval of the same hydrocarbon well, and not from a neighboring well. Logging data associated with at least one of the formation, the injected EOR agent and the produced fluid may then be obtained and utilized in assessing effectiveness of the EOR agent injection.
摘要:
In an embodiment of the disclosure, mixtures of different carbon length alcohols are used as the primary feedstock for Guerbet alcohols. Specifically, embodiments relate to a method of synthesizing mixed molecular weight additives from a mixture of primary alcohols comprising, receiving a mixture of primary alcohols comprising at least two different chain length primary alcohols and reacting the mixture of primary alcohols to produce a mixture of Guerbet alcohols. The mixture of Guerbet alcohols is then used to produce an additive composition comprising additives of different molecular weights.
摘要:
Methods of treating a gas field fluid or oil field fluid is provided, the method comprising: a) adding glutaraldehyde to the gas field fluid or oil field fluid in an amount effective to reduce or inhibit microbial activity; and b) after a delay, adding 3,5-dimethyl-1,3,5-thiadiazinane-2-thione to the gas field fluid or oil field fluid.