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“双高”地震资料处理技术与应用 ——以四川盆地射洪区块沙溪庙组河道砂储层成像为例
"Double-high" seismic-data processing technology and its application: An example from imaging of channel sandbody reservoirs of Shaximiao Formation, Shehong block, Sichuan Basin
杨广广1 吕 龑1 韩 嵩1 粱 菁2 曾华会3
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DOI:
作者单位:1. 中国石油西南油气田公司勘探开发研究院  2. 中国石油西南油气田公司致密油气项目部  3. 中国石油勘探开发研究院西北分院
中文关键字:高保真 高分辨率 中侏罗世 沙溪庙期 河道砂 地震成像 射洪区块 四川盆地
英文关键字:High fidelity; High resolution; Middle Jurassic; Shaximiao Formation; Channel sandbody; Seismic imaging; shehong block; Sichuan basin
中文摘要:    四川盆地射洪区块中侏罗统沙溪庙组河道砂体与烃源断裂的搭配关系非常复杂,由于地震采集覆盖次数低、采集脚印现象严重等因素的影响,常规地震处理资料信噪比低,河道砂体和断裂的成像精度低,不能满足复杂窄细河道地震刻画、储层定量预测和含气性检测的需求。针对这些问题,采用基于“双高”原则的地震资料处理流程与方法,强化处理参数试验与优化,降低采集脚印对高保真成像的影响,提高地震资料的分辨率与成像精度。研究结果表明:①“双高”处理地震资料的信噪比和分辨率明显提高,河道亮点特征及河道边界更明显,断点归位更准确,断裂成像更清晰,有助于开展河道砂体与断裂精细解释;②“双高”处理地震资料含气河道砂储层AVO 特征信息保留得更好,有助于开展储层与含气性预测;③“双高”地震资料处理技术在四川盆地射洪区块取得了较好的应用效果,在其他地区浅层河道砂储层、断裂的高精度成像等方面具有推广应用价值。
英文摘要:    For Middle Jurassic Shaximiao Formation, Shehong block, Sichuan Basin, the collocation of channel sandbodies with source faults is very complex. Affected by low fold and heavy footprint of seismic acquisition, both signal-to-noise ratio of conventional seismic processing data and imaging accuracy of channel sandbodies and faults are too low to meet the demands of seismic depicting complex and narrow channels, quantitative predicting reservoirs, and detecting gas-bearing property. So, this study adopted a seismic-data processing technology based on "double-high (high fidelity and high resolution)" principle to strengthen processing parameter test and optimization, reduce an effect of footprint on high-fidelity imaging, and improve resolution and imaging accuracy. Results show that (1) after an application of the double-high-based technology, the signal-to-noise ratio and resolution are improved significantly, the bright-spot characteristics and channel boundary are more obvious, the breakpoint homing is more accurate, and fault imaging is clearer, which is conducive to a fine interpretation on channel sandbodies and faults; (2) for gas-bearing channel sandbody reservoirs, the AVO feature information may be better preserved in seismic data processed by this technology, which is helpful for predicting reservoirs and gas-bearing property; and (3) this technology has been well applied to Shehong block, and it is worth popularizing in high-accuracy imaging of shallow channel sandbody reservoirs and faults in other areas of Sichuan Basin.
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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:
主管单位:中国石油西南油气田公司  主办单位:中国石油西南油气田公司勘探开发研究院
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