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 1):
A method for stimulating a well in a shale formation comprising:\n providing a treatment mixture containing between about 0.1% and 95% by weight metal complexing agent at a pH of between about 0 and 10; injecting the treatment mixture into the well until at least some of the treatment mixture contacts the shale formation; maintaining the treatment mixture in contact with the shale formation for a contact time of between about 1 minute to 100 days, thereby allowing the metal complexing agent to bind with at least some naturally-occurring metals contained within the shale formation; and removing the treatment mixture from the well after the contact time, thereby removing the bound naturally-occurring metals from the shale formation and thereby improving the hydrocarbon production of the well relative to the hydrocarbon production immediately prior to performance of the method.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 86.0
- Lexical Diversity: 1.78824
- Patent Class: 166.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14686237', '14525038', '13094248', '12252213', '14784792']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7929824039914076
- 35 USC 102 Novelty (BERT): 0.5752313415472765
- Combined Prediction Score: 0.7712072977469945
- Mean Citation Score: 303.799554
- Max Citation Score: 501.33435
- Similarity Product: 447.3080143951357

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