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Estimation of formation properties based on borehole fluid and drilling logs

A stratigraphic and property technology used in earthmoving, geographic modeling, wellbore/well components, etc., to solve problems such as lack of logging data

Active Publication Date: 2018-10-26
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One challenge in developing and evaluating unconventional formations compared to conventional formations is the relative lack of well log data

Method used

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  • Estimation of formation properties based on borehole fluid and drilling logs
  • Estimation of formation properties based on borehole fluid and drilling logs
  • Estimation of formation properties based on borehole fluid and drilling logs

Examples

Experimental program
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Effect test

Embodiment approach 1

[0133] Embodiment 1: A method of estimating one or more properties of an Earth formation, the method comprising: placing a vehicle in a borehole in the Earth formation to receive drilling fluid from the borehole as part of an energy industry operation, the drill The borehole fluid comprises at least an injection fluid injected into the borehole; estimating at least one property of the borehole fluid associated with one or more intervals along the borehole and generating a value indicative of the at least one property at the one or more intervals Mud logging, the at least one property comprising at least one of gas content and cuttings content; estimation by the processor of one or more properties of the formation based on the mud logging, the one or more properties selected from lithology, permeability and controlling one or more operating parameters of the energy industry operation based on the one or more properties of the formation.

Embodiment approach 2

[0134] Embodiment 2: The method of Embodiment 1, wherein estimating at least one property of the drilling fluid comprises measuring the amount of one or more types of gas in the drilling fluid associated with one or more intervals, and generating at least an indication of the total gas amount of gas logging.

Embodiment approach 3

[0135] Embodiment 3: The method of Embodiment 2, wherein generating the gas log comprises estimating the amount of connected gas by identifying a peak in the gas log at a location along the borehole, and comparing the amplitude of the peak to a value along the borehole. Compare the amplitude of the gas logging at one or more other locations.

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Abstract

A method of estimating one or more properties of an earth formation includes disposing a carrier in a borehole in an earth formation as part of an energy industry operation, receiving borehole fluid from the borehole, estimating at least one property of the borehole fluid associated with one or more intervals along the borehole, and generating a mud log that indicates values of the at least one property at the one or more intervals, the at least one property including at least one of gas content and cuttings content. The method also includes estimating, by a processor, one or more properties of the formation based on the mud log, the one or more properties selected from at least one of lithology, permeability, total organic carbon and brittleness, and controlling one or more operational parameters of the energy industry operation based on the one or more properties of the formation.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Application Serial No. 15 / 068033, filed March 11, 2016, which is hereby incorporated by reference in its entirety. Background technique [0003] Geological formations beneath the earth's surface may contain reservoirs of oil and natural gas, which are extracted by drilling one or more boreholes into the earth's subsurface. Boreholes may also be used to measure various properties of the borehole and surrounding subterranean formations. [0004] Unconventional formations are gradually being used in natural gas and oil exploration and production. Unconventional formations are typically low-permeability formations that typically require hydraulic fracturing or other techniques to simulate hydrocarbon recovery. One challenge in developing and evaluating unconventional formations compared to conventional formations is the relative lack of well log data. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): E21B49/08G01N33/24
CPCE21B49/005G01V20/00
Inventor 杨文霞X·张
Owner BAKER HUGHES INC
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