基于层面的地震曲率属性在碳酸盐岩断裂预测中的应用——以塔里木盆地塔北某区块为例
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摘要
塔里木盆地塔北某区块奥陶系碳酸盐岩地质年代老,地层埋深大,原生基质孔隙发育较差,其储层的有利分布区多受断裂控制。因此,对该区断裂进行精细预测显得尤为重要。针对断裂精细预测难度较大这一实际问题,选用近年来颇受关注的地震曲率技术,运用曲率原理和基于层面的地震曲率属性对研究区奥陶系一间房组顶界进行断裂预测,从常用的几种地震曲率中优选出最小负曲率和最大正曲率对断裂进行刻画,取得了较好的应用效果。通过地震剖面和基于层面的地震曲率属性平面图的交互分析发现,所预测的断裂级别、性质及走向都有较好的对应关系。
The Ordovician carbonate rocks in an area of Tarim Basin are characterized by old geological age,large burial depth and poor developed primary matrix pores,and the favorable reservoir distribution is controlled by faults.So it is very important to carry out the fine prediction of fault in this area.The seismic curvature technique based on horizon was used to predict the fault at the top boundary of Ordovician Yijianfang Formation.The minimum negative curvature and maximum positive curvature were selected from the commonly used seismic curvatures to describe the fault,and the result shows the good effects.Through the interactive analysis of seismic profile and plane map of seismic curvature based on horizon,it is found that there are good corresponding relations among the level,nature and strike of the predicted faults.
The Ordovician carbonate rocks in an area of Tarim Basin are characterized by old geological age,large burial depth and poor developed primary matrix pores,and the favorable reservoir distribution is controlled by faults.So it is very important to carry out the fine prediction of fault in this area.The seismic curvature technique based on horizon was used to predict the fault at the top boundary of Ordovician Yijianfang Formation.The minimum negative curvature and maximum positive curvature were selected from the commonly used seismic curvatures to describe the fault,and the result shows the good effects.Through the interactive analysis of seismic profile and plane map of seismic curvature based on horizon,it is found that there are good corresponding relations among the level,nature and strike of the predicted faults.
引文
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[3]袁野,刘洋.地震属性优化与预测新进展[J].勘探地球物理进展,2010,33(4):229-239.
[4]刘伟方,段永华,高建虎,等.利用地震属性预测碳酸盐岩储层[J].岩性油气藏,2007,19(1):101-104.
[5]侯海龙,顾汉明,朱定,等.分频技术在塔河碳酸盐岩储层预测中的应用[J].勘探地球物理进展,2007,30(3):207-210.
[6]滕余团,余建平,崔海峰,等.YH地区碳酸盐岩储层预测方法研究及应用[J].岩性油气藏,2008,20(2):119-123.
[7]尉晓玮,郑晓东,李艳东,等.时频域多属性分析技术在碳酸盐岩岩溶储层预测中的应用[J].石油天然气学报,2008,30(5):251-254.
[8]刘立峰,孙赞东,杨海军,等.缝洞型碳酸盐岩储层地震属性优化方法及应用[J].石油地球物理勘探,2009,44(6):747-754.
[9]张虎权,卫平生,潘建国,等.碳酸盐岩地震储层学[J].岩性油气藏,2010,22(2):14-17.
[10]孙勤华,刘晓梅,刘建新,等.利用波形分析技术半定量预测塔中碳酸盐岩储层[J].岩性油气藏,2010,22(1):101-103.
[11]王宏斌,张虎权,卫平生,等.碳酸盐岩地震储层学在塔中地区生物礁滩复合体油气勘探中的应用[J].岩性油气藏,2010,22(2):18-23.
[12]Sigismondi M E,Soldo J C.Curvature attributes and seismicinter-pretation:Case studies from Argentinabasins[J].The Leading Edge,2003,22(11):1122-1126.
[13]Lisle R J.Detection of zones of abnormal strains in structures using Gaussian curva-ture analysis[J].AAPG Bulletin,1994,78(12):1811-1819.
[14]Hart B S.Validating seismic attributes:Beyond statistics[J].The Leading Edge,2002,21:1016-1021.
[15]Chopra S,Marfurt K J.Seismic attribute mapping of structure and stratigraphy[C].SEG,Distinguished instructor shortcourse series,Tulsa,2006:77-104.
[16]Chopra S,Marfurt K J.Integration of coherence and volumetric curvature images[C].Recovery-CSPG CSEG CWLS Convention,Calgary,2011:1-9.
[17]Chopra S,Marfurt K J.Seismic curvature attributes for mapping faults/fractures and other stratigraphic features[J].CSEG Recorder,2007,32(9):37-41.
[18]Roberts A.Curvature attributes and their application to3D inter-preted horizons[J].First Break,2001,19(2):85-100.
[19]Chopra S,Marfurt K J.Curvature attribute applicationsto3D surface seismic data[J].CSEG Recorder,2006,31(4):44-56.
[20]邬光辉,琚岩,杨仓,等.构造对塔中奥陶系礁滩型储集层的控制作用[J].新疆石油地质,2010,31(5):467-470.
[21]肖普拉S,马弗特K J.地震属性在构造和地层学中的应用[M].北京:石油工业出版社,2008:46-89.
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