PATENT CLAIM ANALYSIS

Application Number: 16234850
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-05
Patent Classification: ["702", "024000"]

Abstract:
Methods and systems are provided for quantifying contributions of gas mixtures in a reservoir compartment by way of isotopic analyses. Differing thermal maturities of the different gas mixtures allow estimation of the relative quantity of each gas mixture present in a total gas mixture. Thermal maturities may be estimated by reference to isotopic analyses of each contributing gas mixture and a commingled gas mixture resulting from commingling each of the individual source gas mixtures. This method may be carried out at various depths to determine relative contributions of each gas mixture to the total gas mixture as a function of wellbore depth. Advantages of certain embodiments include, but are not limited to, higher accuracies and ease of application as compared to conventional methods.

Claim (Index 1):
A method for determining relative contributions of a plurality of gas mixtures to a reservoir compartment of a subterranean formation, the method comprising the steps of:\n (a) externally injecting a secondary gas mixture in the subterranean formation; (b) determining a first gas thermal maturity (R o _ A ) of a first gas mixture, wherein the first gas mixture contributes to a commingled gas mixture in the reservoir compartment; (c) determining a second gas thermal maturity (R o _ B ) of a second gas mixture, wherein the second gas mixture contributes to a commingled gas mixture in the reservoir compartment; (d) obtaining a plurality of samples of the commingled gas mixture at a plurality of depths, the commingled gas mixture at each depth characterized by a plurality of components, wherein the plurality of components comprises a plurality of carbon-based components, wherein each carbon-based component comprises a plurality of stable carbon isotopes; (e) analyzing each of the samples from each depth to determine a stable carbon isotope value (\u03b413C) for two or more of the carbon-based components of each sample; (f) determine a \u03b413C ratio of the stable carbon isotope value (\u03b413C) of a first carbon-based component to the stable carbon isotope value (\u03b413C) of a second carbon-based component, wherein the first carbon-based component is one of the two or more of the carbon-based components, and wherein the second carbon-based component is another of the two or more of the carbon-based components, wherein the \u03b4 13C ratio is determined at each of the plurality of depths; (g) determining a commingled gas mixture thermal maturity (R o _ m ) corresponding to the \u03b413C ratio determined in step (f), wherein determining the commingled gas mixture thermal maturity (R o _ m ) is determined according to a known relationship of thermal maturity as a function of \u03b413C ratio; and (h) determining the relative contribution of the second gas mixture to the comingled gas mixture using the determined R o _ m , R o _ A , and R o _ B .

Metadata:
- Claim Count in Document: 29.0
- Percentile: 98.0
- Lexical Diversity: 1.78082
- Patent Class: 702.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13110698', '12817912', '14994577', '14994570', '14350902']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2082172120980325
- 35 USC 102 Novelty (BERT): 0.5083967925139742
- Combined Prediction Score: 0.2382351701396267
- Mean Citation Score: 204.464428
- Max Citation Score: 304.37183
- Similarity Product: 240.83179470213472

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

Dataset: test