Prosecution Insights
Last updated: October 04, 2026
Application No. 18/014,575

RESERVOIR FLUID PROPERTY ESTIMATION USING MUD-GAS DATA

Final Rejection §101§102
Filed
Jan 05, 2023
Priority
Jul 06, 2020 — GB 2010337.0 +1 more
Examiner
WLODARSKI, NICHOLAS NMN
Art Unit
3672
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Equinor Energy AS
OA Round
2 (Final)
84%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
96%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allowance Rate
121 granted / 144 resolved
+32.0% vs TC avg
Moderate +12% lift
Without
With
+11.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 2m
Avg Prosecution
19 currently pending
Career history
167
Total Applications
across all art units

Statute-Specific Performance

§101
4.1%
-35.9% vs TC avg
§103
38.5%
-1.5% vs TC avg
§102
26.2%
-13.8% vs TC avg
§112
27.5%
-12.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 144 resolved cases

Office Action

§101 §102
Detailed Action Status of Claims Claims 1-14 are currently pending and addressed below. Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim(s) 1-14 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Molla (US Pub No 20210062650) Molla discloses in claim 1. A method of generating a model for predicting at least one property of a fluid (Molla abstract) at a sample location within a hydrocarbon reservoir, comprising: providing a training data set comprising input data (Molla [0039]-[0040] sample database) and target data (Molla [0039]-[0040] sample database comprising different fluid properties), the input data comprising mud-gas data and petrophysical data for each of a plurality of sample locations (Molla [0039]-[0040] sample database filled with 1000+ samples [0071] and includes advanced mud-gas data for providing a continuous fluid property log during drilling), and the target data comprising the at least one property of the fluid for each of the plurality of sample locations (Molla [0039]-[0040] sample database comprising 1000+ samples comprising different fluid properties such as gas composition [0066]); and generating the model (Molla Fig 11; 445 [0067] training data used to train and optimize cluster classification model) using the training data set such that the model can be used to predict the at least one property of the fluid at the sample location based on measured mud-gas data and measured petrophysical data for the sample location (Molla [0068] Fig 11; 455 & 456 are statistical prediction models used to validate prediction models 465 & 466 to predict C6+), wherein a drilling fluid recycling correction has not been applied to the mud-gas data (Molla Fig 11 does not show a drilling fluid recycling correction has been applied to collected data). Molla discloses in claim 2. The method according to claim 1, wherein generating the model comprises instructing a machine learning algorithm to generate the model using the training data set (Molla Fig 3 & Fig 7 [0040] & [0059] model is developed utilizing sample data base to build and train a machine learning model). Molla discloses in claim 3. The method according to claim 1, wherein the at least one property comprises a property influenced by oil-related components of the fluid (Molla [005] [0038] properties influenced are black oil, gas condensate, dry gas, molar gas composition [0058] % GOR, STO density). Molla discloses in claim 4. The method according to claim1, wherein the at least one property comprises one or more of: a density of the fluid at the sample location (Molla [005] [0038] properties influenced are black oil, gas condensate, dry gas, molar gas composition [0058] % GOR, STO density); a gas-oil ratio of the fluid at the sample location(Molla [005] [0038] properties influenced are black oil, gas condensate, dry gas, molar gas composition [0058] % GOR, STO density); and a concentration of C7+ hydrocarbons within the fluid at the sample location (Molla [005] [0038] properties influenced are black oil, gas condensate, dry gas, molar gas composition [0058] % GOR, STO density). Molla discloses in claim 5. The method according to claim1, wherein the mud-gas data of the training data set comprises measured standard mud-gas data for the sample location (Molla [0058] data includes standard mud-gas data C1-C5 Mol % ). Molla discloses in claim 6. The method according to claim 5, wherein an extraction efficiency correction has been applied to the mud-gas data of the training data set (Molla [0058] data includes standard mud-gas data C1-C5 Mol % [0071] advanced mud gas data is applied as it is considered optional). Molla discloses in claim 7. The method according to claim 5, wherein an extraction efficiency correction has not been applied to the mud-gas data of the training data set (Molla [0058] data includes standard mud-gas data C1-C5 Mol % [0071] advanced mud gas data is not applied as it is considered optional), and wherein the training data comprise drilling mud compositional data (Molla [0022] [0037] drilling mud composition used in developing the training data). Molla discloses in claim 8. The method according to claim 5, wherein the measured mud-gas data was collected without the use of heating (Molla [0029] mud-gas data can be collected without the use of heating as Molla describes an optional ability to heat drilling mud). Molla discloses in claim 9. The method according to claim1, wherein the petrophysical data comprise one or more of: bulk density (Molla [0041] density); neutron porosity (Molla [0071] neutron density-porosity); resistivity data (Molla [0041] resistivity data); acoustic data (Molla [0071] sonic); natural gamma ray (Molla [0041] gamma ray); nuclear magnetic resonance data (Molla [0041] NMR); Molla discloses in claim 10. A computer-based model for predicting at least one property of a fluid at a sample location within a hydrocarbon reservoir based on measured mud-gas data and measured petrophysical data for that sample location (Molla Fig 13 processing system [0072] [0068] Fig 11; 455 & 456 are statistical prediction models used to validate prediction models 465 & 466 to predict C6+), the computer-based model having been generated by the method according to claim 1 (See claim 1 above and Molla [0072] processing system utilizing computing devices). Molla discloses in claim 11. A tangible computer-readable medium storing the computer-based model according to claim 10 (Molla Fig 13; 930). Molla discloses in claim 12. The method according to claim 1, further comprising: receiving measured mud-gas data and measured petrophysical data for the sample location (Molla [0039]-[0040] sample database comprising 1000+ samples comprising different fluid properties such as gas composition [0066] disclosing the work flow in Fig 11 utilizing various measured data samples and measured petrophysical data points further emphasized in [0071] disclosing various properties to be collected); supplying the measured mud-gas data and the measured petrophysical data to the model (Molla [0039]-[0040] sample database filled with 1000+ samples [0071] and includes advanced mud-gas data for providing a continuous fluid property log during drilling); and predicting a value of a property of a fluid at a sample location by using the model. (Molla [0068] Fig 11; 455 & 456 are statistical prediction models used to validate prediction models 465 & 466 to predict C6+). Molla discloses in claim 13. The method according to claim 12, further comprising: predicting a value of a fluid property of a fluid at a plurality of sample locations along a length of a well (Molla [0039]-[0040] sample database filled with 1000+ samples [0071] and includes advanced mud-gas data for providing a continuous fluid property log during drilling [0068] Fig 11; 455 & 456 are statistical prediction models used to validate prediction models 465 & 466 to predict C6+). Molla discloses in claim 14. The method according to claim 13, further comprising: displaying, using an electronic display screen (Molla [0077] display device), a graph plotting the predicted values of the fluid property against a location of the respective sample location for each of the plurality of sample locations along the length of the well (Molla [0023] inter and intra well fluid facies mapping, reservoir complexities, [0071] selection for well landing points, geo-steering using fluid information). Response to Arguments Applicant’s amendments and arguments, filed 06/11/2026, with respect to claims 1-14 have been fully considered and are persuasive. The rejections of claims 1-14 under 35 USC 112b has been withdrawn. Applicant’s amendments and arguments, filed 06/11/2026, with respect to claims 1-14 have been fully considered and are persuasive. The rejections of claims 12-14 under 35 USC 101 has been withdrawn. Applicant's arguments filed 06/11/2026 have been fully considered but they are not persuasive. In response to applicant's argument that the references fail to show certain features of the invention, it is noted that the features upon which applicant relies (i.e., standard vs advanced mud logging) are not recited in the rejected claim(s). Although the claims are interpreted in light of the specification, limitations from the specification are not read into the claims. See In re Van Geuns, 988 F.2d 1181, 26 USPQ2d 1057 (Fed. Cir. 1993). Furthermore, Applicants arguments regarding Molla not teaching the use of a combination of mud-gas data and petrophysical data is unpersuasive. Examiner’s opinion under broadest reasonable interpretation is that Molla teaches that Mud-gas data ([0037]) from the drilling operations is used in combination with reservoir fluid samples and historical data ([0037]) to predict the fluid composition along the wellbore ([0038]) these teachings in the Examiners opinion teach the limitations of the claim 1 and therefore, Examiner does not find the arguments presented as persuasive. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Nicholas D Wlodarski whose telephone number is (571)272-3970. The examiner can normally be reached Monday - Friday 8:00 am - 5:00 pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Nicole Coy can be reached at (571) 272-5405. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /NICHOLAS D WLODARSKI/Examiner, Art Unit 3672 /Nicole Coy/Supervisory Patent Examiner, Art Unit 3672
Read full office action

Prosecution Timeline

Jan 05, 2023
Application Filed
Mar 11, 2026
Non-Final Rejection mailed — §101, §102
Jun 11, 2026
Response Filed
Aug 31, 2026
Final Rejection mailed — §101, §102 (current)

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
84%
Grant Probability
96%
With Interview (+11.5%)
2y 2m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 144 resolved cases by this examiner. Grant probability derived from career allowance rate.

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