公开(公告)号：US20240295170A1

公开(公告)日：2024-09-05

申请号：US18177600

申请日：2023-03-02

Applicant: Chevron U.S.A. Inc.

Inventor： Scott Alan Hanson ,  Marcus Oliver Wigand ,  Luisa Carolina Crousse

IPC: E21B44/00 ,  E21B47/07 ,  E21B49/00

CPC classification number: E21B44/00 ,  E21B47/07 ,  E21B49/005

Abstract: A method for measuring gas volume during mudlogging of a subterranean field operation may include obtaining measurements for a plurality of parameters associated with a core sample retrieved from a subterranean formation, where the plurality of parameters are measured while the core sample is under downhole conditions, and where the plurality of parameters comprises a volume of fluid in a gaseous state. The method may also include applying the measurements to an algorithm to generate a calibrated algorithm, where the calibrated algorithm is used to generate an output based on measurements made during the mudlogging.

公开(公告)号：US20210125291A1

公开(公告)日：2021-04-29

申请号：US17077223

申请日：2020-10-22

Applicant: Chevron U.S.A. Inc.

Inventor： Mayank Malik ,  Scott Alan Hanson ,  Simon Robert John Clinch

IPC: G06Q50/06 ,  E21B49/00 ,  G01N33/28 ,  G01N15/08

Abstract: A method is described for quantitative pay summaries from mud logs, real-time fluid typing, and to minimize logging expense in high-angle or horizontal wells. The method may include receiving at least one mud log; selecting extraction system type, operating, and drilling parameters for the at least one mud log; determining hydrocarbon parameters such as methane (C1) extraction efficiency, trap response factor (TRF), and relative responses for ethane-pentane (C2-C5); correcting gas-in-mud volume to an earth surface to generate a corrected C1-C5; calculating a gas-to-oil ratio (GOR) from the corrected C1-C5; calculating a reservoir gas volume from the gas-in-mud volume to an earth surface and the GOR; determining pay cutoffs; and generating least one pay summary. The method may be executed by a computer system.