利用地震前积反射特征确定古水流方向的沉积几何方法
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摘要
古水流条件分析是确定沉积盆地古水系、古物源及沉积体系展布,进行岩相古地理研究必不可少的内容。传统的古水流研究方法主要分为统计方法或百分比法、沉积几何学方法2类。根据地震剖面上前积反射的成因,利用交叉地震剖面上前积反射之间的几何关系,可以定量地确定古水流方向。这种方法适用于盆地勘探的不同阶段,与传统的沉积几何学方法比较,其不仅易于操作,而且便于更准确、定量地判定地质历史时期区域性的古水流主方向。盆地演化后期的构造改造会在不同程度上影响该方法的适用性,此时应与其他方法结合使用。
Analysis of paleocurrent conditions is the necessary part of the research on paleo-water and palaeo-source and depositional systems,and lithofacies paleo-geography in sedimentary basin.The traditional research methods can be divided into two types;statistics or percent methods and sedimentary geometry methods.According to the origin of progradation reflection in the seismic section,a geometrical method is introduced to calculate the paleocurrent direction quantitatively using the geometry relationships between progradation reflections in the cross sections.It fits to different stage of basin exploration.Compared with the traditional sedimentary geometry means,it has the advantages of convenient process,and also is easy to hold the regional paleocurrent directions of certain geologic period.At the later stage of basin e-volution,the availability of this means may be impacted by tectonic changes,thus it is necessary to be combined with other methods.
Analysis of paleocurrent conditions is the necessary part of the research on paleo-water and palaeo-source and depositional systems,and lithofacies paleo-geography in sedimentary basin.The traditional research methods can be divided into two types;statistics or percent methods and sedimentary geometry methods.According to the origin of progradation reflection in the seismic section,a geometrical method is introduced to calculate the paleocurrent direction quantitatively using the geometry relationships between progradation reflections in the cross sections.It fits to different stage of basin exploration.Compared with the traditional sedimentary geometry means,it has the advantages of convenient process,and also is easy to hold the regional paleocurrent directions of certain geologic period.At the later stage of basin e-volution,the availability of this means may be impacted by tectonic changes,thus it is necessary to be combined with other methods.
引文
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[10]张新培,孙晓明.应用测井信息建立塔中地区志留系沉积构造解释模型[J].油气地质与采收率,2007,14(4):19-22.
[11]郭玉新.东营凹陷深陷期层序特征及沉积充填模式[J].油气地质与采收率,2005,12(3):28-30.
[12]孟小红,田春志,梁江平.利用岩石磁学研究古水流和古应力场方向的方法与应用[J].现代地质,1999,13(2):184-189.
[13]张年富,齐雪峰,王英民,等.准噶尔盆地侏罗系Ⅲ层序底界上下砂体预测与有利区评价[J].石油与天然气地质,2002,23(2):145-149.
[14]张明利,金之钧,万天丰,等.柴达木盆地应力场特征与油气运聚关系[J].石油与天然气地质,2005,26(5):674-679.
[2]汪正江,陈洪德,张锦泉.物源分析的研究与展望[J].沉积与特提斯地质,2000,20(4):104-110.
[3]杨剑萍,操应长.惠民凹陷下第三系沙河街组基山砂体成因及石油地质意义[J].石油大学学报:自然科学版,1999,23(4):9-12.
[4]于翠玲,林承焰.储层非均质性研究进展[J].油气地质与采收率,2007,14(4):15-18.
[5]李珍,焦养泉,刘春华,等.黄骅坳陷高柳地区重矿物物源分析[J].石油勘探与开发,1998,25(6):5-7.
[6]范代读,邱桂强,李从先,等.东营三角洲的古流向研究[J].石油学报,2000,21(1):29-33.
[7]刘少峰,柯爱蓉,吴丽云,等.鄂尔多斯西南缘前陆盆地沉积物物源分析及其构造意义[J].沉积学报,1997,15(1):156-160.
[8]戴春山,丛友滋.古湖泊的磁组构学研究及其在油气勘探中的应用[J].海洋地质与第四纪地质,1997,17(3):17-24.
[9]孙立东,赵永军,曲长胜,等.Fischer曲线在古气候研究中的应用——以车镇凹陷古近系沙三段为例[J].油气地质与采收率,2007,14(2):51-53.
[10]张新培,孙晓明.应用测井信息建立塔中地区志留系沉积构造解释模型[J].油气地质与采收率,2007,14(4):19-22.
[11]郭玉新.东营凹陷深陷期层序特征及沉积充填模式[J].油气地质与采收率,2005,12(3):28-30.
[12]孟小红,田春志,梁江平.利用岩石磁学研究古水流和古应力场方向的方法与应用[J].现代地质,1999,13(2):184-189.
[13]张年富,齐雪峰,王英民,等.准噶尔盆地侏罗系Ⅲ层序底界上下砂体预测与有利区评价[J].石油与天然气地质,2002,23(2):145-149.
[14]张明利,金之钧,万天丰,等.柴达木盆地应力场特征与油气运聚关系[J].石油与天然气地质,2005,26(5):674-679.
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