PATENT CLAIM ANALYSIS

Application Number: 15875265
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-06
Patent Classification: ["166", "250010"]

Abstract:
This disclosure describes formulations and methods for stimulating the production from wells in nano-darcy shale formations. In one embodiment, the method includes injecting a treatment mixture containing a metal complexing agent into a nano-darcy shale formation adjacent to a well at a pressure below the fracture pressure of the formation. A sufficient contact time is allowed and then the treatment mixture is pumped from the subsurface. This has been shown to stimulate well production in shale formations. Without being held to a particular theory it appears that the metal complexing agent is binding with naturally occurring metals in the shale formation, and particularly divalent metal ions, which are then extracted with the spent fluid. This removal of naturally occurring metals may be increasing the permeability of the formation in the contact region adjacent to the well, thereby causing the observed increased production.

Claim (Index 12):
The method according to  claim 1 , the metal complexing agent being selected from glutamic acid diacetic acid (GLDA), methylglycine diacetic acid (MGDA), \u03b2-alanine diacetic acid (\u03b2-ADA), ethylenediaminedisuccinic acid, S,S-ethylenediaminedisuccinic acid (EDDS), iminodisuccinic acid (IDS), hydroxyiminodisuccinic acid (HIDS), polyamino disuccinic acids, N-bis[2-(1,2-dicarboxyethoxy)ethyl]glycine (BCA6), N-bis[2-(1,2-dicarboxyethoxy)ethyl]aspartic acid (BCA5), N-bis[2-(1,2-dicarboxyethoxy)ethyl]methylglycine (MCBA5), N-tris[(1,2-dicarboxyethoxy)ethyl]amine (TCA6), N-methyliminodiacetic acid (MIDA), iminodiacetic acid (IDA), N-(2-acetamido)iminodiacetic acid (ADA), hydroxymethyl-iminodiacetic acid, 2-(2-carboxyethylamino) succinic acid (CEAA), 2-(2-carboxymethylamino) succinic acid (CMAA), diethylenetriamine-N,N\u2033-disuccinic acid, triethylenetetramine-N,N\u2032\u2033-disuccinic acid, 1,6-hexamethylenediamine-N,N\u2032-disuccinic acid, tetraethylenepentamine-N,N\u2033\u2033-disuccinic acid, 2-hydroxypropylene-1,3-diamine-N,N\u2032-disuccinic acid, 1,2-propylenediamine-N,N\u2032-disuccinic acid, 1,3-propylenediamine-N,N\u2032-disuccinic acid, cis-cyclohexanediamine-N,N\u2032-disuccinic acid, trans-cyclohexanediamine-N,N\u2032-disuccinic acid, ethylenebis(oxyethylenenitrilo)-N,N\u2032-disuccinic acid, glucoheptanoic acid, cysteic acid-N,N-diacetic acid, cysteic acid-N-monoacetic acid, alanine-N-monoacetic acid, N-(3-hydroxysuccinyl) aspartic acid, N-[2-(3-hydroxysuccinyl)]-L-serine, aspartic acid-N,N-diacetic acid, aspartic acid-N-monoacetic acid, any salt thereof, any derivative thereof, or any combination thereof.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 86.0
- Lexical Diversity: 1.78824
- Patent Class: 166.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['14686237', '14525038', '13094248', '12252213', '14784792']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8099099153656831
- 35 USC 102 Novelty (BERT): 0.5846553253330412
- Combined Prediction Score: 0.7873844563624189
- Mean Citation Score: 303.799554
- Max Citation Score: 501.33435
- Similarity Product: 484.07330514386587

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test