http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112961661-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-10 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-725 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-528 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-528 |
| filingDate | 2021-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-10-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-10-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112961661-B |
| titleOfInvention | A kind of nano acid used for acidification and plugging removal of low permeability reservoirs |
| abstract | The invention relates to the technical field of oil recovery engineering, and belongs to a nano acid used for acidification and plugging removal of low-permeability reservoirs. The invention solves the problem that the conventional acid solution has poor plug-removing effect on low-permeability reservoirs and repeated acidification wells. The present invention is composed of powder nitric acid, sulfamic acid, organic phosphoric acid, corrosion inhibitor, complexing agent, functional nano-fluid and water, and their weight percentages are: powder nitric acid 8-10%, sulfamic acid 5-7%, Organic phosphoric acid 3~5%, corrosion inhibitor 0.5~1%, complexing agent 1.5~2%, functional nanofluid 0.3~0.5%, water 74.5%~81.7%. The invention can increase the sweeping range of the small pores in the low-permeability region that the conventional acid solution cannot act on, and greatly improve the plugging removal effect. The invention can be used in the acidification and plugging removal construction of low-permeability reservoirs and repeated acidification wells, and has the advantages of good injectability, long action distance, wide sweeping range, and the like. |
| priorityDate | 2021-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 48.