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VSP 测井技术在页岩气储层预测中的应用
Application of VSP logging technology in the prediction of shale gas reservoirs
张维1 罗坤1 秦俐1 雍杰1 刘丽婷1 朱霁伟1 刘哿行2
点击:1512次 下载:19次
DOI:10.12055/gaskk.issn.1673-3177.2017.02.006
作者单位:1. 中国石油川庆钻探工程有限公司地球物理勘探公司 2. 中国石油川庆钻探工程有限公司地质勘探开发研究院
中文关键字:VSP 测井 页岩气 储层 岩石物理 弹性参数 交会分析 高分辨率 井旁构造
英文关键字:VSP logging; Shale gas; Reservoir; Rock physics; Elastic parameter; Cross analysis; High resolution; Near-well structure
中文摘要:

垂直地震剖面法勘探技术(以下简称VSP 测井)是一项成熟的井中物探技术,该技术利用地面放炮、井中置放检波器接收地震波,有效避免了近地表低速层的影响,得到的地震信息更接近目的层,具有独特的勘探优势。我国页岩气勘探潜力巨大,页岩气储层具有高电阻率、高伽马、高声波时差、低密度的测井响应特征,具有较为明显的岩石物理弹性参数规律,非常适用于VSP 测井技术进行页岩气勘探。利用常规VSP 测井技术在贵州地区某井进行页岩气勘探,零井源距VSP 测井获得地层的纵波、横波速度,计算得到岩石地球物理参数,并通过交会分析识别储层物性规律以用于储层预测;利用非零井源距VSP 测井,进行VSP-CDP 剖面叠加,获得了高分辨率的井旁地层结构,为储层精细地震响应特征分析奠定基础,对水平井轨迹设计具有参考作用。

英文摘要:

Vertical Seismic Profiling (VSP) logging is a mature borehole geophysical technique. The technique adopts the ground shooting and the geophone in borehole to receive seismic waves, so that the influence of near-surface low-velocity layers is avoided effectively and the seismic data obtained approximate those of target layer. The shale gas exploration potential is great in China. Shale gas reservoirs usually reveal the logging responses of high resistivity, high GR, high acoustic time difference, and low density. These reservoirs have obvious elastic parameters of rock physics. The VSP logging technology is very suitable for shale gas exploration in these reservoirs. The conventional VSP logging technique was used for shale gas exploration in a well in Guizhou, and the zero-offset VSP logging was conducted to obtain the P-wave and S-wave velocities of the formation. Then, the geophysical parameters of the rock were calculated and the physical properties of the reservoir were identified by means of cross analysis for reservoir prediction. The non-zero offset VSP logging was used for VSP-CDP profile superimposition. As a result, the high-resolution near-well formation structure was obtained, which lays a foundation for the analysis of fine seismic response characteristics of the reservoir and plays a guiding role in the horizontal well trajectory design.

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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
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