用于储层描述的反射地震方法与应用
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摘要
叙述了用于储层描述的反射地震新方法和在大庆探区的应用情况。对于大庆探区单层砂岩仅为几米的陆相薄互层储层的描述，传统的反射地震方法已很难实现。为此，我们围绕地震资料采集、处理和解释三个环节开展了研究工作，形成了一套以高分辨率地震技术为核心的储层描述反射地震技术方法。在采集上，采用高采样率、高低截滤波、高检波器自然频率、小组合基距、全部检波器深埋接收等方法；在处理上，采用分时静校正、分频叠加等方法；在解释上，采用一维波动方程反演波阻抗、地震道非线性混沌反演等方法。经大庆探区大面积推广使用，证实了地震勘探的分辨率和准确度有大幅度提高，地震剖面主频比用常规地震勘探技术提高100％，在1800m深度上达80Hz，取得了较好的地质效果。
The paper narrates new reflection seismic methods for reservoir characterization and their applications in the Daqing prospect. For the description of landfacies thin bed reservoirs in the area where the single-bed sandstone is only several meters thick, the conventional reflection seismic methods do not work efficiently. For this reason, we construct a set of reflection seismic methods for reservoir descrip-tion with the high resolution seismic technology as the core through the research on the three links of seismic acquisition, processing and interpretation. In acquisition, we adopt high sample rate, high low-cut filtering, high natural frequency of geophones, small array base distance, deeply burying of all geo-phones, etc. In processing, we adopt time-division static correction and frequency-division stacking. In interpretation, we adopt 1-D wave equation impedance inversion and non-linear chaotic inversion of seis-mic traces. Large-area applications of these methods in the Daqing prospect demonstrate that the resolu-tion and accuracy of seismic prospecting are increased by a big margin and dominant frequencies of seis-mic sections are raised by 100%, reaching 80 Hz at the 1800 m depth. Significant geologic results are thus achieved.
The paper narrates new reflection seismic methods for reservoir characterization and their applications in the Daqing prospect. For the description of landfacies thin bed reservoirs in the area where the single-bed sandstone is only several meters thick, the conventional reflection seismic methods do not work efficiently. For this reason, we construct a set of reflection seismic methods for reservoir descrip-tion with the high resolution seismic technology as the core through the research on the three links of seismic acquisition, processing and interpretation. In acquisition, we adopt high sample rate, high low-cut filtering, high natural frequency of geophones, small array base distance, deeply burying of all geo-phones, etc. In processing, we adopt time-division static correction and frequency-division stacking. In interpretation, we adopt 1-D wave equation impedance inversion and non-linear chaotic inversion of seis-mic traces. Large-area applications of these methods in the Daqing prospect demonstrate that the resolu-tion and accuracy of seismic prospecting are increased by a big margin and dominant frequencies of seis-mic sections are raised by 100%, reaching 80 Hz at the 1800 m depth. Significant geologic results are thus achieved.
引文
1 李庆忠. 走向精确勘探的道路. 北京:石油工业出版社,1993
2[美]渥·伊尔马滋.地震数据处理北京:石油工业出版社,1994
3 杨文采.地震道的非线性混沌反演(Ⅰ).地球物理学报,1993,36(2)
4 杨文采.地震道的非线性混沌反演(Ⅱ). 地球物理学报,1993,36(3)
5刘家琦.微分方程反演波阻抗剖面成果报告. 哈尔滨工业大学,1992
2[美]渥·伊尔马滋.地震数据处理北京:石油工业出版社,1994
3 杨文采.地震道的非线性混沌反演(Ⅰ).地球物理学报,1993,36(2)
4 杨文采.地震道的非线性混沌反演(Ⅱ). 地球物理学报,1993,36(3)
5刘家琦.微分方程反演波阻抗剖面成果报告. 哈尔滨工业大学,1992
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