http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-112961661-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b0ee9dd8e95a029e14d80e0ad4562380 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a340d10136d796975ff75fba4710e6ad |
| 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/C09K8-528 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-72 |
| filingDate | 2021-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ee55f8c7e88b166c6a7705c3cfe35329 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f5c169244f9e32a639f53dd02cf423a7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_79c6f0a6ebd55400704d546c2c698b22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_204f688de062ad54c19ab1e17b520f4a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ce2da76f49d418398625c1d607bf9695 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4a552e42a0630c7f877b74120e1666b3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_87d3728d0efb8d8786acbde1c0e2b0c2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a344dc2f216bad4de7315201c2c6879b |
| publicationDate | 2021-06-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-112961661-A |
| 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: 58.