泌阳凹陷孙岗地区地震相识别
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摘要
泌阳凹陷孙岗地区钻、测井资料较少,而地震资料较丰富。为了解研究区沉积特征,利用地震相识别方法对该区内典型地震相以及地震相平面特征进行了研究。根据地震相与沉积相的对应关系,参照瞬时频率地震属性平面图、古地貌发育情况以及少量井的单井相特征,将地震相平面展布图转化为沉积相平面展布图。通过研究,共识别出4种典型地震相:楔状前积地震相、斜交前积地震相、叠瓦状前积地震相、平行—亚平行地震相。在研究区北部,核三段Ⅰ砂组上段和下段沉积时期均大面积发育不同期次辫状河三角洲前缘沉积体;在研究区南部,上段沉积时期仅发育1个扇三角洲前缘朵叶,下段沉积时期发育2个扇三角洲前缘朵叶。
In order to understand the sedimentary characteristics in Sungang area of Biyang Sag, the typical seismic facies and the planar characteristics of seismic facies of the study area were studied by using the seismic facies identification method. Based on the corresponding relation of seismic facies and sedimentary facies, instantaneous frequency planar graph, palaeogeomorphology and the single well facies of some wells, the planar graphs of seismic facies were translated into the planar graphs of sedimentary facies. By the study, four typical seismic facies in the study area were identified, including sphenoid foreset facies, oblique foreset facies, imbricate progradation facies and sub-paralleling sheet facies. In the northern study area , there are vast braideddelta front subfacies of the different period in the upper sub-member and the lower position of sand groupⅠof He 3 member. In the southern study area, there is only one leafy sand body of fan delta front in the upper sub-member of sand groupⅠof He 3 member, and two leafy sand bodies of fan delta front in the lower position of sand groupⅠof He 3 member.
In order to understand the sedimentary characteristics in Sungang area of Biyang Sag, the typical seismic facies and the planar characteristics of seismic facies of the study area were studied by using the seismic facies identification method. Based on the corresponding relation of seismic facies and sedimentary facies, instantaneous frequency planar graph, palaeogeomorphology and the single well facies of some wells, the planar graphs of seismic facies were translated into the planar graphs of sedimentary facies. By the study, four typical seismic facies in the study area were identified, including sphenoid foreset facies, oblique foreset facies, imbricate progradation facies and sub-paralleling sheet facies. In the northern study area , there are vast braideddelta front subfacies of the different period in the upper sub-member and the lower position of sand groupⅠof He 3 member. In the southern study area, there is only one leafy sand body of fan delta front in the upper sub-member of sand groupⅠof He 3 member, and two leafy sand bodies of fan delta front in the lower position of sand groupⅠof He 3 member.
引文
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[11]曹卿荣,李佩,孙凯,等.应用地震属性分析技术刻画河道砂体[J].岩性油气藏,2007,19(2):93-96.
[12]凌云研究组.基本地震属性在沉积环境解释中的应用研究[J].地球物理勘探,2003,38(6):642-653.
[2]翟中喜,陆建林,胡望水,等.泌阳凹陷新生代构造控油规律研究[J].石油天然气学报(江汉石油学院学报),2010,32(3):43-46.
[3]刘启亮,罗顺社,刘良刚,等.泌阳凹陷南部陡坡带核桃园组沉积体系研究[J].沉积与特提斯地质,2011,31(1):48-52.
[4]彭勇民,周子勇,曾联波,等.南阳地区泌阳凹陷沉积相展布与油气勘探[J].中国地质,2012,39(1):119-126.
[5]王敏芳,焦养泉,任建业,等.沉积盆地中古地貌恢复的方法与思路——以准噶尔盆地西山窑组沉积期为例[J].新疆地质,2006,24(3):326-330.
[6]吴嘉鹏,王英民,马贵明,等.孟加拉扇某区块地层层序划分及典型地震相识别[J].岩性油气藏,2010,22(2):69-73.
[7]郭伟,李小刚,刘尚军,等.焉耆盆地博湖坳陷三工河组下段地震相-沉积相分析[J].岩性油气藏,2012,24(2):11-15.
[8]朱筱敏,刘长利,张义娜,等.地震沉积学在陆相湖盆三角洲砂体预测中的应用[J].沉积学报,2009,27(5):915-921.
[9]常景慧,冉崎,黄天俊,等.川中地区上三叠统须家河组二、四段地震相特征及其地质意义[J].天然气工业,2012,32(3):38-41.
[10]胡明毅,吴玉坤,徐艳霞,等.西湖凹陷深层宝石组沉积相特征及沉积相模式[J].石油天然气学报(江汉石油学院学报),2011,33(8):1-6.
[11]曹卿荣,李佩,孙凯,等.应用地震属性分析技术刻画河道砂体[J].岩性油气藏,2007,19(2):93-96.
[12]凌云研究组.基本地震属性在沉积环境解释中的应用研究[J].地球物理勘探,2003,38(6):642-653.
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