RU2016150545A - Быстрая вязкоакустическая и вязкоупругая инверсия полного волнового поля - Google Patents

Быстрая вязкоакустическая и вязкоупругая инверсия полного волнового поля Download PDF

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RU2016150545A
RU2016150545A RU2016150545A RU2016150545A RU2016150545A RU 2016150545 A RU2016150545 A RU 2016150545A RU 2016150545 A RU2016150545 A RU 2016150545A RU 2016150545 A RU2016150545 A RU 2016150545A RU 2016150545 A RU2016150545 A RU 2016150545A
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equations
viscoelastic
viscoacoustic
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Хусейн ДЕНЛИ
Алекс КАНЕВСКИЙ
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Эксонмобил Апстрим Рисерч Компани
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V20/00Geomodelling in general
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/28Processing seismic data, e.g. for interpretation or for event detection
    • G01V1/282Application of seismic models, synthetic seismograms
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V2210/00Details of seismic processing or analysis
    • G01V2210/60Analysis
    • G01V2210/61Analysis by combining or comparing a seismic data set with other data
    • G01V2210/614Synthetically generated data
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V2210/00Details of seismic processing or analysis
    • G01V2210/60Analysis
    • G01V2210/61Analysis by combining or comparing a seismic data set with other data
    • G01V2210/616Data from specific type of measurement
    • G01V2210/6161Seismic or acoustic, e.g. land or sea measurements
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V2210/00Details of seismic processing or analysis
    • G01V2210/60Analysis
    • G01V2210/62Physical property of subsurface
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V2210/00Details of seismic processing or analysis
    • G01V2210/60Analysis
    • G01V2210/67Wave propagation modeling
    • G01V2210/675Wave equation; Green's functions

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Claims (47)

1. Способ, содержащий этапы, на которых:
получают, с помощью компьютера, начальную геофизическую модель;
моделируют, с помощью компьютера, прямое волновое поле с помощью вязкоакустических или вязкоупругих волновых уравнений, при этом прямое волновое поле с вязкоакустическими волновыми уравнениями основано на первой вспомогательной переменной, которая является функцией как от давления, так и от переменной запоминающего устройства, либо прямое волновое поле с вязкоупругими волновыми уравнениями основано на второй вспомогательной переменной, которая является функцией как от механического напряжения, так и переменной запоминающего устройства, соответственно, и первая и вторая вспомогательные переменные выбираются с возможностью исключать член сейсмической скорости из прямого волнового поля с помощью вязкоакустических или вязкоупругих волновых уравнений;
моделируют, с помощью компьютера, сопряженное волновое поле с помощью сопряженных вязкоакустических или сопряженных вязкоупругих волновых уравнений, которые извлекаются из прямых вязкоакустических или прямых вязкоупругих волновых уравнений, соответственно, и основаны на сопряженном операторе первой или второй вспомогательной переменной, соответственно, при этом моделирование включает в себя этап, на котором инструктируют пространственной производной переменной запоминающего устройства выпадать из сопряженных вязкоакустических или вязкоупругих волновых уравнений вследствие сопряженной первой или второй вспомогательной переменной;
получают, с помощью компьютера, градиент функции затрат на основе комбинации модели прямого волнового поля и модели сопряженного волнового поля; и
используют, с помощью компьютера, градиент функции затрат для того, чтобы обновлять начальную геофизическую модель и получать обновленную геофизическую модель.
2. Способ по п. 1, в котором получение начальной геофизической модели включает в себя этап, на котором получают релаксационные параметры для данного коэффициента качества с использованием обобщенной реологической модели Максвелла и параметров акустической или упругой среды.
3. Способ по п. 1, в котором получение начальной геофизической модели включает в себя этап, на котором получают релаксационные параметры для данного коэффициента качества с использованием начальной реологической модели и параметров акустической или упругой среды.
4. Способ по любому из пп. 1-3, в котором сопряженное волновое поле моделируется с использованием сопряженных вязкоакустических уравнений.
5. Способ по любому из пп. 1-4, в котором вспомогательная переменная является
Figure 00000001
, где p является давлением,
Figure 00000002
является переменной запоминающего устройства для механизма l, где l является целым числом, большим или равным 1, и
Figure 00000003
является параметром инверсии для механизма l.
6. Способ по любому из пп. 1-5, в котором сопряженные вязкоакустические уравнения являются следующими:
Figure 00000004
,
Figure 00000005
,
Figure 00000006
,
Figure 00000007
,
где
Figure 00000008
является оператором дивергенции,
t является временем,
Figure 00000009
является нерелаксированным модулем объемной деформации (
Figure 00000010
),
Figure 00000011
является массовой плотностью,
Figure 00000012
является сейсмической скоростью (
Figure 00000013
в трехмерном пространстве),
Figure 00000014
является сопряженным давлением,
Figure 00000015
является функцией затрат, где
Figure 00000016
является параметрами модели (т.е. некоторой комбинация
Figure 00000017
или
Figure 00000018
,
Figure 00000009
и
Figure 00000011
)
Figure 00000019
является сопряженной сейсмической скоростью, и
Figure 00000020
является частотой релаксации для механизма l,
Figure 00000021
и
Figure 00000022
являются производными целевой функции
Figure 00000023
относительно давления и сейсмической скорости, соответственно.
7. Способ по любому из пп. 1-6, в котором сопряженное волновое поле моделируется с использованием сопряженных вязкоупругих уравнений.
8. Способ по п. 7, в котором вспомогательная переменная является
Figure 00000024
, где
Figure 00000025
является механическим напряжением,
Figure 00000026
является переменной запоминающего устройства для механизма l, где l является целым числом, большим или равным 1,
Figure 00000027
является упругим конститутивным соотношением для изотропной нерелаксированной системы, и
Figure 00000028
является конститутивным соотношением для запоминающей системы.
9. Способ по п. 8, в котором сопряженные вязкоупругие уравнения являются следующими:
Figure 00000029
,
Figure 00000030
,
Figure 00000031
,
Figure 00000032
,
где t является временем,
Figure 00000033
является сопряженным механическим напряжением,
Figure 00000034
,
Figure 00000019
является сопряженной сейсмической скоростью,
Figure 00000035
является сопряженным полем запоминающего устройства для механизма l,
Figure 00000036
,
Figure 00000037
является переменной, заданной для ясности для механизма l,
Figure 00000038
,
Figure 00000011
является массовой плотностью,
Figure 00000039
и
Figure 00000022
являются производными целевой функции
Figure 00000023
относительно механического напряжения и сейсмической скорости, соответственно
Figure 00000040
=
Figure 00000041
,
что является упругим конститутивным соотношением для изотропной нерелаксированной системы с точки зрения постоянных
Figure 00000042
и
Figure 00000043
Ламе,
Figure 00000044
=
Figure 00000045
,
что является конститутивным соотношением для запоминающей системы (
Figure 00000046
вычисляются из коэффициента качества продольных и поперечных сейсмоволн с использованием уравнения (9)), и
Figure 00000047
является оператором относительной деформации,
Figure 00000048
,
Figure 00000015
является функцией затрат, где
Figure 00000016
является параметрами модели (т.е. некоторой комбинацией
Figure 00000049
,
Figure 00000050
или
Figure 00000046
,
Figure 00000042
,
Figure 00000043
и
Figure 00000011
).
10. Способ по любому из пп. 1-9, дополнительно содержащий этап, на котором используют обновленную подповерхностную модель для того, чтобы управлять углеводородами.
11. Способ по любому из пп. 1-10, в котором начальная геофизическая модель включает в себя модель на основе сейсмической скорости.
12. Способ по любому из пп. 1-11, в котором начальная геофизическая модель включает в себя модель на основе коэффициента качества.
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