东营凹陷辛镇构造南翼沙三段沉积体系研究
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摘要
以辛镇构造南翼沙河街组三段(E2s3)为例,利用地震、钻井、测井资料建立研究区目的层层序地层格架;在此层序格架基础上,对地震资料进行地震属性分析,然后结合已有的对该区沉积背景的认识,对属性分析和反演结果进行地质解释,刻画沉积微相平面展布,得到了较好的应用效果。研究表明,可将E2s3分为3个三级层序(长期旋回),即SQE2s3L、SQE2s3m、SQE2s3u,分别对应于沙三下亚段(E2s3L)、沙三中亚段(E2s3m)和沙三上亚段(E2s3u)。对重点研究的SQE2s3m则进一步划分为6个中期旋回,每个次级旋回内部都包括了近对称的基准面上升半旋回和下降半旋回。辛镇构造地区E2s3沉积时期,由于三角洲前缘的滑塌,发育了一系列深水浊积扇砂岩体。E2s3的沉积过程是一个三角洲向湖盆进积的过程,具有从早期到晚期三角洲逐渐向湖盆内部推进,沉积中心从东向西迁移的特征。
By taking the 3 rd Member of Shahejie Formation in Xinzhen Structure for example , seismic , drilling , logging data were deployed to establish a high-frequency sequence stratigraphic framework.On the basis of the sequence framework , and in combination with sedimentary background , seismic attribute analysis was carried out , the attribute analysis and inversion results were interpreted , and the distribution of sedimentary microfacies was depicted.A good application result is obtained.Study shows that the 3 rd Member of Shahejie Formation can be divided into three GradeⅢ sequences ( long-term base level cycles ), these are SQE2sL3 , SQE2sm3 , and SQE2su3 .They are response to the lower member ( E2sL3 ), the mid member ( E2sm3 ) and the upper member ( E2su3 ) of Shahejie Formation respectively.Among them , SQE2sm3 can be further divided into 6medium-term base level cycles.Every sub-cycle includes approximate symmetrical rising half cycle and falling half cycle.During the sedimentary period the 3 rd member of Shahejie Formation , it develops a series of deepwater turbidite fan sand body for slump of delta front.It is a progradation progress from SQE2s L3 to SQE2su3 , where the depocenter migrates from east to west.
By taking the 3 rd Member of Shahejie Formation in Xinzhen Structure for example , seismic , drilling , logging data were deployed to establish a high-frequency sequence stratigraphic framework.On the basis of the sequence framework , and in combination with sedimentary background , seismic attribute analysis was carried out , the attribute analysis and inversion results were interpreted , and the distribution of sedimentary microfacies was depicted.A good application result is obtained.Study shows that the 3 rd Member of Shahejie Formation can be divided into three GradeⅢ sequences ( long-term base level cycles ), these are SQE2sL3 , SQE2sm3 , and SQE2su3 .They are response to the lower member ( E2sL3 ), the mid member ( E2sm3 ) and the upper member ( E2su3 ) of Shahejie Formation respectively.Among them , SQE2sm3 can be further divided into 6medium-term base level cycles.Every sub-cycle includes approximate symmetrical rising half cycle and falling half cycle.During the sedimentary period the 3 rd member of Shahejie Formation , it develops a series of deepwater turbidite fan sand body for slump of delta front.It is a progradation progress from SQE2s L3 to SQE2su3 , where the depocenter migrates from east to west.
引文
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[2]韩清华,兖鹏,余朝华,等.渤海湾盆地东营凹陷辛东地区构造演化及油气成藏规律[J].地质力学学报,2008,14(4):362～373.
[3]操应长,刘晖.湖盆三角洲沉积坡度带特征及其与滑塌浊积岩分布关系的初步探讨[J].地质论评,2007,53(4):454～458.
[4]鄢继华,陈世悦,姜在兴.三角洲前缘浊积体成因及分布规律研究[J].石油实验地质,2008,30(1):16～20.
[5]彭大钧,庞雄,黄先律,等.南海珠江深水扇系统的形成模式[J].石油学报,2007,28(5):7～11.
[6]刘志华,邓昆,乐锦波,等.鄂尔多斯盆地富县地区深湖浊积沉积特征[J].石油天然气学报(江汉石油学院学报),2010,32(6):186～192.
[7]刘桠颖,徐怀民,李林,等.准噶尔盆地阜东斜坡带深水浊积扇沉积及油气勘探意义[J].沉积与特提斯地质,2009,29(4):29～35.
[8]马德波,李明,张佳佳,等.鄂尔多斯盆地西南部地区延长组浊积砂体的地震识别研究[J].石油天然气学报(江汉石油学院学报),2009,31(4):73～78.
[9]William McCaffrey,Benjamin K.Process controls on the development of stratigraphic trap potential on the margins of confined turbiditesystems and aids to reservoir evaluation[J].AAPG Bulletin,2001,85(6):971～988.
[10]张晶,王伟峰,荣启宏,等.东营凹陷永55区块沙四上亚段深水浊积扇沉积与油气[J].吉林大学学报(地球科学版),2007,37(3):519～524.
[11]夏宝华,刘笑翠,孟偑,等.濮城油田沙二上亚段2+3砂组沉积微相及沉积模式[J].石油天然气学报(江汉石油学院学报),2008,30(2):211～216.
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