公开(公告)号：US10151849B2

公开(公告)日：2018-12-11

申请号：US14748737

申请日：2015-06-24

Applicant: Chevron U.S.A. Inc.

Inventor： Mayank Malik ,  John DeSantis ,  Fuju Chen ,  Li Jiang ,  Saijin Huang ,  John A. Best

IPC: G01V1/40

Abstract: Desirable completion zones can be identified using closure stress in combination with one or more other attributes such as porosity. One computer-based well placement method includes using the computer to: process a seismic data volume to map the spatial distribution of a seismic-based CSS attribute; acquire logs from one or more boreholes in the subsurface region; derive from the logs a relationship between CSS and a minimum in-situ stress; apply the relationship to the CSS attribute map to produce a landing map that highlights desirable completion zones; and place one or more wells in the desirable completion zones. The borehole logs may include direct measurements of minimum in-situ stress (acquired via microfracture testing), sonic tool measurements of P-wave and S-wave velocity, and density tool measurements of bulk formation density.

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.