http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2021017445-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c860c0fe21a8ff1ca8f3234bf1f60628 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K2208-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-26 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-725 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B43-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/E21B21-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-76 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09K8-92 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/E21B21-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-76 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-72 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-68 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09K8-92 |
| filingDate | 2020-06-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_64e8361259d282e2107a5f2f8451530b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_480e2266562bcdf509501837a7daa4fe http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb7ae10130b74cbe637398929572e950 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d3e920ac8f9570aff8cb99ec0cdced59 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0400a1bf7ab03a6eee39f9794039d090 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4dd107a1a21b7faf30851430969e27bb http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a4e7aa5e2b0d37e0a38e3139468bcb7c |
| publicationDate | 2021-01-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2021017445-A1 |
| titleOfInvention | Carbonate reservoir filtration-loss self-reducing acid |
| abstract | The present invention relates to a carbonate reservoir filtration-loss self-reducing acid fracturing method. The carbonate reservoir filtration-loss self-reducing acid fracturing method comprises the steps: (1) calculating a fracture pressure and a fracture extension pressure of a reconstructed reservoir; (2) injecting an agent A into a stratum under a pressure higher than the stratum fracture pressure, so that fractures are generated on the stratum; (3) injecting an agent B into the stratum under a pressure higher than the stratum fracture pressure, such that the agent B extends the fractures and communicates with a natural fracture net; (4) pumping an acid liquor system agent C with a high etching power into the stratum under a pressure higher than the extension pressure but lower than the fracture pressure to improve the conductivity of the fractures; (5) injecting a displacing liquid agent D under a pressure lower than the stratum fracture pressure to jack acid liquor in a well casing into the stratum; and (6) shutting down a well and performing flow-back. The agent A is a gel acid or VES acid, the agent B is a filtration-loss self-reducing gel acid or filtration-loss self-reducing VES acid, the agent C is closed acid, and the agent D is a displacing liquid. According to the method of the present invention, precipitation type solid filter cakes are formed on wall surfaces of the fractures by utilizing a filtration-loss self-reducing system, so as to perform temporary blocking to reduce the filtration loss. The technology is simple with easy injection, and the filtration-reducing agent is easy to disperse and flow back, and the method is safe and environment-friendly. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115703962-A |
| priorityDate | 2019-07-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 130.