新近系馆陶组上段储层预测方法——以济阳坳陷沾化凹陷垦东北部地区为例
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摘要
综合分析垦东北部地区新近系馆陶组上段储层速度分析和正演分析结果,结合储层地质特征,提出适合本区储层预测的3种方法:1)由于孤立河道具有强振幅、透镜状的地震反射特征,可以应用可视化解释软件在振幅数据体上直接进行储层的立体追踪;2)连续的强振幅波峰和波谷指示砂岩的连续沉积,砂岩与泥岩速度相近,阻抗资料不能有效区分砂体,因此可选用特征曲线反演进行储层的空间分布研究;3)本区典型气层速度远低于泥岩速度,气层具有低阻抗特征,因此波阻抗反演可以预测气层的空间分布。
Three reservoir prediction approaches are proposed based on reservoir characteristics,reservoir velocity,and forward modeling analyses in northern Kendong: 1) direct 3-D tracing of the reservoirs on amplitude data volume can be performed with visualized interpretation software since the isolated river channel sands feature in seismic reflectance signatures of high amplitude and lenticular shape;2) characteristic curve inversion can be an option in the study of spatial distribution of reservoirs due to the facts that continuous crests and troughs of high amplitude indicate a successive sedimentation of sandstone and similar velocities of sandstone and mudstone render an ineffective distinction of sandbody through impedance data;and 3) wave impedance inversion can be used in prediction of the spatial distribution of gas reservoirs because the typical gas reservoirs in the study area show low impedance and a velocity far lower than that of mudstone.An integrated application of the three approaches is of great significance in improving the accuracy of reservoir prediction and performing lateral prediction of reservoirs in the study area.
Three reservoir prediction approaches are proposed based on reservoir characteristics,reservoir velocity,and forward modeling analyses in northern Kendong: 1) direct 3-D tracing of the reservoirs on amplitude data volume can be performed with visualized interpretation software since the isolated river channel sands feature in seismic reflectance signatures of high amplitude and lenticular shape;2) characteristic curve inversion can be an option in the study of spatial distribution of reservoirs due to the facts that continuous crests and troughs of high amplitude indicate a successive sedimentation of sandstone and similar velocities of sandstone and mudstone render an ineffective distinction of sandbody through impedance data;and 3) wave impedance inversion can be used in prediction of the spatial distribution of gas reservoirs because the typical gas reservoirs in the study area show low impedance and a velocity far lower than that of mudstone.An integrated application of the three approaches is of great significance in improving the accuracy of reservoir prediction and performing lateral prediction of reservoirs in the study area.
引文
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2万晓龙,邱楠生,张善文.东营凹陷岩性油气藏动态成藏过程[J].石油与天然气地质,2004,25(4):448~451
3谭茂金,杨邦伟,贾黎,等.胜利老河口油田桩106井区馆陶组成藏规律研究[J].石油与天然气地质,2006,27(1):44~47
4张建宁.牛庄洼陷浊积岩砂体储层物性地震预测方法[J].石油地球物理勘探,2005,44(6):716~720
5谈彩萍,刘翠荣,周新科,等.中国东部老油区油气成藏特征[J].石油实验地质.2004,2(27):144~150
6苏应雪,张秉政.济阳坳陷孤北古潜山逆断层的发现及其地质意义[J].石油勘探与开发,1987,14(4):42~47
7陆基孟.地震勘探原理[M].北京:石油工业出版社,1993
8刘震.储层地震地层学[M].北京:地质出版社,1997
9陈遵德.储层地震属性优化方法[M].北京:石油工业出版社,1998
10邓宏文.高分辨率层序地层学——原理及应用[M].北京:地质出版社,2002
11于兴河.碎屑岩系油气储层沉积学[M].北京:石油工业出版社,2002
12万静萍,马立祥.沉积学简明教程——以沉积环境和相为主[M].湖北武汉:中国地质大学出版社,1992
13牟荣.复杂小断块圈闭识别描述方法——以苏北盆地为例[J].石油与天然气地质,2006,27(2):269~274
14鲁国明,刘魁元.济阳坳陷高凸起斜坡带新近系油气成藏与勘探实践[J].石油与天然气地质,2006,27(2):258~262
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