Tracing subterranean fluid flow includes providing a first polymeric tracer to a first injector, collecting a first aqueous sample from a first producer, and assessing the presence of the first polymeric tracer in the first aqueous sample. The first polymeric tracer includes a first polymer formed from at least a first monomer. The presence of the first polymeric tracer in the first aqueous sample is assessed by removing water from the first aqueous sample to yield a first dehydrated sample. pyrolyzing the first dehydrated sample to yield a first gaseous sample, and assessing the presence of a pyrolization product of the first polymer in the first gaseous sample. The presence of the pyrolization product of the first polymer in the first gaseous sample is indicative of the presence of a first subterranean flow pathway between the first injector location and the first producer location.
Pendant epoxide polymers and methods of treating subterranean formations
申请人:Saudi Arabian Oil Company
公开号:US10005930B2
公开(公告)日:2018-06-26
This document relates to compositions including a crosslinkable polymer including a pendant epoxide repeat unit and an amine crosslinker, and methods of treating a subterranean formation by providing the composition to the formation. The pendant epoxide repeat unit has the structure
Each R1 is independently a (C1-C10) alkylene or (C1-C10) alkylene ether, each alkylene ether independently having a ratio of carbon atoms to oxygen atoms of 1:1 to 4:1.
Tracing subterranean fluid flow includes providing a first polymeric tracer to a first injector, collecting a first aqueous sample from a first producer, and assessing the presence of the first polymeric tracer in the first aqueous sample. The first polymeric tracer includes a first polymer formed from at least a first monomer. The presence of the first polymeric tracer in the first aqueous sample is assessed by removing water from the first aqueous sample to yield a first dehydrated sample. pyrolyzing the first dehydrated sample to yield a first gaseous sample, and assessing the presence of a pyrolization product of the first polymer in the first gaseous sample. The presence of the pyrolization product of the first polymer in the first gaseous sample is indicative of the presence of a first subterranean flow pathway between the first injector location and the first producer location.
Surface logging wells using depth-tagging of cuttings
申请人:Saudi Arabian Oil Company
公开号:US10808529B2
公开(公告)日:2020-10-20
A method for surface logging a well uses a plurality of polymeric taggants distinguishable from each other. The method includes selecting the polymeric taggants that have ceiling temperatures that do not interfere with pyrograms from source rock decomposition and adding each of the plurality of polymeric taggants to a circulating drilling fluid in a sequence while drilling the well. A sample of drill cuttings carried by the circulating drilling fluid is then taken. The method also includes measuring, using pyrolysis-gas chromatographymass spectrometry, concentrations of individual polymeric taggants attached to the drill cuttings in the sample and analyzing, using pyrolysis-gas chromatographymass spectrometry, properties of the drill cuttings. A depth associated with the sample is identified based, at least in part, on the measured concentrations of individual polymeric taggants and on the sequence.
Transmembrane pH-gradient polymersomes and their use in the scavenging of ammonia and its methylated analogs
申请人:ETH Zurich
公开号:US11026891B2
公开(公告)日:2021-06-08
The present invention provides polymersomes comprising non-biodegradable amphiphilic block-copolymers and their enteral (e.g., oral) or topical use in the treatment of an ammonia or ammonia methylated analog-associated disease or disorder or symptom thereof (e.g., hyperammonemia or trimethylaminuria). More particularly, it provides a polymersome comprising (a) a membrane, which comprises a block copolymer of poly(styrene) (PS) and poly(ethylene oxide) (PEO), wherein the PS/PEO molecular weight ratio is higher than 1.0 and lower than 4.0; and (b) a core which encloses an acid. It also provides a method of making the polymersome comprising mixing the copolymer-containing organic solvent phase with an aqueous phase containing the acid.