迈陈凹陷东部构造演化及其对构造样式的影响  

Structural Evolution of Eastern Maichen Sag in Junggar Basin and Influence on Its Structural Styles

作　　者：陈伟[1,2] 刘宏宇[1] 吴峰[1] 侯峰[3] 陈长征[1] 马月琴 

机构地区：[1]中国石化江苏油田分公司地质科学研究院,江苏扬州225009 [2]中国石化江苏油田分公司博士后科研工作站,江苏扬州225009 [3]中国石油新疆油田分公司陆梁油田作业区,新疆克拉玛依834000 [4]中国石油新疆油田分公司实验检测研究院,新疆克拉玛依834000

出　　处：《新疆石油地质》2013年第4期402-404,共3页Xinjiang Petroleum Geology

摘　　要：根据地震、钻井、测井资料,将迈陈凹陷新生界自下而上划分为长流组—流沙港组、涠洲组和新近系—第四系3个构造层,分别对应凹陷的陆相断陷、断拗过渡和海相拗陷3个构造演化阶段。这3个演化阶段之间的转变导致了凹陷构造格局的2次转变:始新世末期盆地构造格局由北东向转为近东西向;古近纪末期盆地整体抬升剥蚀,由断陷转变为区域拗陷。下部构造层区域应力以纯拉张为主,主要发育伸展构造样式;中部构造层区域应力场以拉张-走滑为主,主要发育伸展-走滑构造样式;上部构造层断裂发育较少或不发育。Through the detailed analysis of seismic,drilling and well logging data,the Cenozoic of Maichen sag in Junggar basin can be divided into three structural zones from the bottom up： Changliu formation-Liushagang formation,Weizhou formation and Neogene-Quaternary.They correspond to such three structural evolution stages as continental rift stage,rift-depression transition stage and marine depression stage.The transition changes of the three stages result in two transformations of structural pattern of this sag： at the end of Eocene the Junggar basin＇s pattern transformed from NE to near EW;at the end of paleogene the whole basin was uplifted and eroded,becoming regional depression from rift.At the same time,the differences of structural evolution made the different structural styles developed in different structural zones： the stress in the lower structural zone（Changliu formation-Liushagang formation） was dominated by tension,developing stretch structural style;the stress in the middle structural zone（Weizhou formation） was tension and strike-slip,mainly developing stretch and strike-slip style,and in the upper structural zone（Neogene-Quaternary） few or no fault occurred.

关 键 词：迈陈凹陷 构造层 构造演化 构造格局 构造样式 

分 类 号：TE111.2[石油与天然气工程—油气勘探]