浊积砂岩混相岩石物理建模及时移地震正演分析

卜崇航; 张佳佳; 张广智; 胡永泽; 赵新科

doi:10.15953/j.ctta.2025.048

浊积砂岩混相岩石物理建模及时移地震正演分析

中国石油大学（华东）地球科学与技术学院，山东青岛 266580

基金项目:

国家自然基金青年基金（多重孔隙介质地震岩石物理模型构建及孔隙结构表征（41404088））。

详细信息

作者简介:
卜崇航，男，地质工程专业硕士研究生，主要从事岩石物理建模及储层预测研究，E-mail：136216548@qq.com

通讯作者:
张佳佳✉，男，教授，主要研究方向为地震岩石物理与叠前储层预测，E-mail：zhangjj@upc.edu.cn。

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出版历程
- 收稿日期: 2025-02-16
- 修回日期: 2025-03-26
- 录用日期: 2025-03-31
- 网络出版日期: 2025-05-27

Turbidite Sandstone Miscible Rock Physical Modeling and Time-lapse Seismic Forward Modeling Analysis

School of Earth Sciences and Technology, China University of Petroleum (East China), Qingdao 266580, China

摘要

摘要:
深水浊积砂岩表现为高孔隙度、高渗透率，对油气生产和二氧化碳封存具有重要意义。在英国北海油田以及北美洲圭亚那油田深水浊积砂岩储层，开展了大量的时移地震开采开发工作。由于浊积砂岩的高孔隙度与低骨架模量特征，他们是开展时移地震的理想储层。较高的孔隙度，导致储层内流体的模量变化会对储层的弹性参数造成较大的影响，在实际油藏开采过程中，尤其是在注入流体的过程中，由于较高的孔隙压力，往往会出现混相的情况，气体会溶解于地层水和石油中进而导致流体的体积模量及密度发生变化。在时移地震剖面上引起干扰。因此，明确流体混相引起的储层弹性参数变化显得尤为重要。构建考虑流体混相的浊积砂岩储层地震岩石物理模型，建立浊积砂岩物性参数（孔隙度、饱和度）、混相流体参数以及地层压力与弹性参数（纵波速度、横波速度）之间的定量关系，为浊积砂岩的地震响应特征分析、储层预测、流体识别及勘探开发提供理论模型与技术支持。
- 浊积砂岩 /
- 岩石物理 /
- 流体混相 /
- AVO正演模拟
Abstract:
Gas injection technology enhances oil recovery by maintaining reservoir pressure and improving displacement efficiency. In deepwater turbidite sandstone reservoirs (characterized by high porosity, permeability, and pore pressure), fluid injection alters the elastic properties through gas dissolution in formation fluids, thereby affecting the accuracy of time-lapse seismic monitoring. This study established a rock physics model linking reservoir parameters (porosity and saturation), fluid mixing effects, and elastic moduli (P/S-wave velocities) in turbidite systems, providing a theoretical foundation for seismic response analysis and fluid identification in offshore exploration, particularly in North Sea and Guyana oilfields.
- turbidity sandstone /
- petrophysics /
- fluid miscibility /
- AVO Forward Simulation

HTML全文

图 1 测井数据实际骨架边界验证图

Figure 1. Validation Diagram of Actual Skeleton Boundary from Logging Data

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图 2 油气水混相示意图

Figure 2. Oil-gas-water miscible diagram

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图 3 不同流体模量参数随含气量变化图

Figure 3. Variation of different fluid modulus parameters with gas content

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图 4 考虑混相的浊积砂岩岩石物理模型流程图

Figure 4. Flow chart of miscible turbidite sandstone rock physical mode

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图 5 混相浊积砂岩岩石物理模型横波预测结果

Figure 5. S-wave prediction results of miscible turbidite sandstone rock physics model

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图 6 饱和岩石弹性参数随流体含气量变化图

Figure 6. Variation of elastic parameters of saturated rock with gas content of fluid

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图 7 流体含气量与含水饱和度变化量版

Figure 7. Fluid gas content and water saturation variation plot

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图 8 弹性参数差异随含水饱和度与流体含气量变化图

Figure 8. Variation of elastic parameter difference with water saturation and fluid gas content

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图 9 正演模拟示意图

Figure 9. Forward simulation schematic diagram

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表 1 混相模型参数

Table 1 Mixed-phase model parameters

储层参数		油藏参数
孔隙压力	69 MPa	温度	114℃
上覆压力	95 MPa	含油饱和度	80%
泥质含量	22%	石油重量	34（API重量）
含水饱和度	20%	气体重量	0.76
孔隙度	23%	盐度	20083 ppm

下载: 导出CSV

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