地震油气检测技术在宁东油田的应用
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摘要
宁东油田构造上处于鄂尔多斯盆地南部天环坳陷中段,油藏类型主要为岩性复合油藏,该区储层物性横向变化大,油藏分布不规律,勘探难度较大。通过基于双相介质理论的共振滤波油气检测技术,提取主力油层"低频共振、高频衰减"信息,进行油气检测,预测结果与大部分井的测试结果相符合,与已有钻井结果对比具有很高的符合率。这项检测技术基本适用于研究区的地质及地震资料条件,为宁东油田储层预测及含油性预测提供了一种有效的技术与手段。
Structurally Ningdong Oilfield was in the middle of Tianhuan Depression located in the south of Ordos Basin. Reservoir type was lithologic composite system. Its reservoir physical property changed severely in lateral direction with irregular reservoir distribution, thus its exploration was difficult. By using the technique of resonance and filtration of oil and gas detection based on the theory of two-phase media, the information of "low frequency resonance and high frequency attenuation" was extracted from main reservoirs for oil and gas detection. The result is mostly consistent with that of detection. And coincidence rate is higher compared with that of drilled wells. The detecting technique is basically suitable for the situation of regional geologic and seismic data, therefore effective technical means is provided for reservoir and oil-bearing prediction in Ningdong Oilfield.
Structurally Ningdong Oilfield was in the middle of Tianhuan Depression located in the south of Ordos Basin. Reservoir type was lithologic composite system. Its reservoir physical property changed severely in lateral direction with irregular reservoir distribution, thus its exploration was difficult. By using the technique of resonance and filtration of oil and gas detection based on the theory of two-phase media, the information of "low frequency resonance and high frequency attenuation" was extracted from main reservoirs for oil and gas detection. The result is mostly consistent with that of detection. And coincidence rate is higher compared with that of drilled wells. The detecting technique is basically suitable for the situation of regional geologic and seismic data, therefore effective technical means is provided for reservoir and oil-bearing prediction in Ningdong Oilfield.
引文
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[7]李霞·俄罗斯地球物理勘探前沿技术文集[M]·北京:石油工业出版社,2000·
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