裂缝性储层的地震响应特征——以川中地区致密砂岩储层为例
Seismic Response of Fractured Reservoirs —Taking the Tight Sandstone Reservoirs in the Central Region of Sichuan for Example
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- 引用格式:
-
仇鹏,牟中海,蒋裕强,刘峰,罗芳,李杨.裂缝性储层的地震响应特征——以川中地区致密砂岩储层为例[J].天然气与石油,2011,29(3):0.doi:
.Seismic Response of Fractured Reservoirs —Taking the Tight Sandstone Reservoirs in the Central Region of Sichuan for Example[J].Natural Gas and Oil,2011,29(3):0.doi:
- DOI:
- 作者:
- 仇 鹏1 牟中海1 蒋裕强1 刘 峰1 罗 芳2 李 杨3
- 作者单位:
- 1.西南石油大学资源与环境学院，2.中国石油天然气集团公司川庆钻探工程有限公司地质勘探开发研究院，3.中国石油天然气集团公司青海油田公司格尔木炼油厂
- 关键词:
- 裂缝；模型正演；地质模型；地震模型；地震响应；相干分析
Crack； Forward modeling； Geological model； Seismic model； Seismic Response； Coherence analysis
- 摘要:
- 为了提取裂缝性储层在不同地震剖面上的地震响应特征，利用相干分析方法得到了裂缝性储层发育区的裂缝识别标志。首先用模型正演方法设计符合研究区地质实际的裂缝性储层地质模型，以此建立研究区主频条件下的地震模型，总结裂缝发育区常规剖面上的地震响应特征；而后对地震模型进行相干性分析，得到了相干剖面上裂缝发育区的识别标志，对比发现相干分析的识别标志和常规剖面的地震响应特征是相吻合的，而且特征更明显、响应更清晰；最后通过钻井证实该区域裂缝发育带的存在，有效证明了相干分析方法在识别、预测裂缝发育带上是可靠的、科学的。
Coherent analysis method is adopted to obtain fracture identification marks in fractured reservoir development areas in order to obtain seismic response characteristics of fractured reservoirs on different seismic profiles. Adopted is the forward modeling firstly in this method to design the geological model of the fractured reservoirs consistent with actual conditions in the researched area， establish the seismic model under main frequency conditions in the area accordingly and summarize seismic response characteristics of fracture development areas on the conventional profiles. Conducted is coherent analysis on the seismic model and obtained are fracture identification marks in fracture development areas on relative profiles and it is found through comparison that the identification marks resulting from coherent analysis is consistent with the seismic response characteristics on the conventional profiles and the characteristics are more obvious and the response is more clear. Finally， it is confirmed through drilling that fracture development zones are real in the areas， which shows that the coherence analysis is an effective， reliable and scientific method for identifying and predicting fracture development zones.
