PATENT CLAIM ANALYSIS

Application Number: 16140062
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-01
Patent Classification: ["166", "305100"]

Abstract:
An oil recovery composition of an aqueous solution of one or more salts and dilute polymer and processes for enhanced oil recovery using the oil recovery composition are provided. An oil recovery composition may include an aqueous solution of one or more salts having a salinity of about 4000 parts-per-million (ppm) total dissolved solids (TDS) to about 8000 ppm TDS, a polymer having a concentration of 250 ppm to 500 ppm, metal oxide nanoparticles of up to 0.1 weight (wt) %, and dissolved CO 2 . The one or more salts may include at least one of sodium chloride (NaCl), calcium chloride (CaCl2), magnesium chloride (MgCl2), sodium sulfate (Na2SO4) and magnesium sulfate (MgSO4). The polymer may include a copolymer of acrylamide and acrylamido tertiary butyl sulfonate (ATBS). The oil recovery compositions provided may be suited for enhancing oil recovery in carbonate reservoirs having in situ oil viscosities less than 3 centipoise (cP).

Claim (Index 1):
A method for enhancing oil recovery in a hydrocarbon containing carbonate reservoir formation, comprising:\n injecting a slug of an oil recovery composition into the carbonate reservoir formation, injecting a second solution into the carbonate reservoir formation after injecting the slug of the oil recovery composition, the oil recovery composition comprising:\n an aqueous solution of one or more salts having a salinity in the range of 4000 parts-per-million (ppm) total dissolved solids (TDS) to 8000 ppm TDS, the one or more salts comprising at least one of: sodium chloride (NaCl), calcium chloride (CaCl2), magnesium chloride (MgCl2), sodium sulfate (Na2SO4) and magnesium sulfate (MgSO4), the aqueous solution comprising at least 400 ppm sulfate ions and 300 ppm or less divalent cations, the divalent cations comprising calcium, magnesium, or a combination thereof; \n a polymer having a concentration in the range of 250 ppm to less than 500 ppm; \n a plurality of metal oxide nanoparticles having a concentration in the range of 0.5 weight (wt) % to 0.1 wt %; and \n dissolved carbon dioxide (CO 2 ) in the aqueous solution.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 97.0
- Lexical Diversity: 2.06818
- Patent Class: 166.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15903952', '15358435', '15358449', '13286901', '13286916']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8068194227977847
- 35 USC 102 Novelty (BERT): 0.574384370128825
- Combined Prediction Score: 0.7835759175308888
- Mean Citation Score: 372.370956
- Max Citation Score: 470.92276
- Similarity Product: 452.8320868163037

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test