PATENT CLAIM ANALYSIS

Application Number: 16090312
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-04
Patent Classification: ["166", "268000"]

Abstract:
Methods for enhanced oil recovery are disclosed. In one method, an oil-bearing sandstone formation having a clay content of at least 5 wt. % is injected with a surfactant mixture, a solution comprising 0.5 to 3 wt. % aqueous alkali, and an aqueous solution comprising a polyether. In another method, a sandstone formation having a salinity within the range of 20,000 to 100,000 ppm total dissolved solids and a divalent ion content within the range of 1,000 to 10,000 ppm is injected with a surfactant mixture and an aqueous solution comprising a polyether. In both methods, the polyether solution is injected as a sacrificial agent prior to injection of the surfactant mixture or is injected as a mitigation agent concurrently with the surfactant mixture. Surprisingly, adsorption of the surfactant mixture onto the formation can be reduced by 20-70% or more compared with a similar methods performed without the aqueous alkali solution, the polyether solution, or both.

Claim (Index 15):
The method of  claim 13  wherein the formation has a salinity within the range of 50,000 to 100,000 ppm total dissolved solids.

Metadata:
- Claim Count in Document: 41.0
- Percentile: 97.0
- Lexical Diversity: 2.20513
- Patent Class: 166.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['12909631', '13286901', '11602184', '15365170', '12879231']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.809032111239104
- 35 USC 102 Novelty (BERT): 0.494631764752345
- Combined Prediction Score: 0.7775920765904281
- Mean Citation Score: 232.160964
- Max Citation Score: 272.90967
- Similarity Product: 207.00214189623355

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