柴达木三湖地区转换波地震资料处理解释技术应用
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摘要
柴达木盆地三湖地区由于地下含气所引起的能量吸收与构造畸变问题,单一纵波资料在该区岩性油气藏勘探历程中表现出明显局限性。利用多波地震勘探技术加入的转换波信息,能解决纵波资料受多重因素影响而出现的多解性问题,极大提高储层预测、油气检测的精度。以柴达木盆地三湖地区多波数据地震勘探为应用实例,进一步完善了转换波资料处理、多波联合解释技术,在转换波静校正、转换波叠前时间偏移技术上取得突破的基础上,利用获得的高品质多波数据,深化多波联合解释技术,进行多波地震属性联合分析及油气预测,确定岩性气藏范围,经实际钻探验证,获得良好的地质效果。
There exits obvious limitations by using P-wave data for reservoir characterization alone in Sanhu area, Qaidam Basin, due to energy absorbing and structure distortion caused by underground gas. Affected by many factors, using P-wave data alone may lead to multi-solution problem. This problem could be solved by using multi-wave seismic exploration techniques and converted-wave data, and the accuracy of reservoir forecast and oil-gas detection could be improved a lot. Taking seismic exploration in Sanhu area based on multi-wave data as an example, the converted-wave data processing technique and the interpretation technique combining multiple waves have been improved. Based on making breakthroughs in converted-wave static correction and prestack time migration, and using high-quality multi-wave data, the interpretation technique combining multiple waves has been improved; joint analysis of multi-wave seismic attributes and oil-gas detection have been conducted to confirm lithologic gas reservoirs. Good geological results have been achieved in practical drilling and exploration.
There exits obvious limitations by using P-wave data for reservoir characterization alone in Sanhu area, Qaidam Basin, due to energy absorbing and structure distortion caused by underground gas. Affected by many factors, using P-wave data alone may lead to multi-solution problem. This problem could be solved by using multi-wave seismic exploration techniques and converted-wave data, and the accuracy of reservoir forecast and oil-gas detection could be improved a lot. Taking seismic exploration in Sanhu area based on multi-wave data as an example, the converted-wave data processing technique and the interpretation technique combining multiple waves have been improved. Based on making breakthroughs in converted-wave static correction and prestack time migration, and using high-quality multi-wave data, the interpretation technique combining multiple waves has been improved; joint analysis of multi-wave seismic attributes and oil-gas detection have been conducted to confirm lithologic gas reservoirs. Good geological results have been achieved in practical drilling and exploration.
引文
[1]黄绪德,杨文霞.转换波地震勘探[M].北京:石油工业出版社,2008.
[2]赵邦六,等.多分量地震勘探技术理论与实践[M].北京:石油工业出版社,2007.
[2]赵邦六,等.多分量地震勘探技术理论与实践[M].北京:石油工业出版社,2007.
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