高邮凹陷南断阶东部阜宁期构造应力场及其对断层的控制作用  

Structural stress field of Funing sedimentary period and its control on faults in the east of south fault terrace in Gaoyou sag

作　　者：戴俊生[1] 王霞田[1,2] 季宗镇[1] 马晓鸣[3] 冯阵东[1] 张效恭[2] 

机构地区：[1]中国石油大学地球资源与信息学院,山东青岛266555 [2]中国石油新疆油田分公司,新疆克拉玛依834000 [3]中国地质大学能源学院,北京100083

出　　处：《中国石油大学学报（自然科学版）》2011年第2期1-5,19,共6页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家'十五'科技重点攻关项目(2003BA613A-02)

摘　　要：在断层级别划分的基础上分析断层的走向变化、组合规律及活动特征,建立地质模型,并确定SE152°~NW 332°为区域应力的加载方向,结合岩石力学试验确定岩石力学参数及加载应力值,采用有限单元法对工区阜宁沉积期构造应力场进行数值模拟,详细分析构造应力对断层的控制作用。结果表明：南断阶东部阜宁沉积期最小主应力均表现为张应力,沿真①断层在许庄地区和竹墩地区的向北凸出位置出现两个最小主应力高值区,断层发育密集;剪应力呈条带状右旋、左旋区域相间展布,右旋最大剪应力和最小主应力控制产生北北东向正断层,左旋最大剪应力和最小主应力控制产生近东西向正断层。Based on the division of fault grade,fault strike changes,composition rules and fault activity characteristics were analyzed,the geological model was established,and the loading direction of regional stress was calculated as SE152°-NW332°.The rock mechanical parameters and loading stress values were determined on the basis of rock mechanism tests.The numerical simulation on structural stress field of Funing sedimentary period in the east of south fault terrace was done by finite element method,and the control of structural stress on faults was analyzed in detail.The results show that the minimum principal stress of Funing sedimentary period is tensile stress with two high value areas in the north convex parts of Xuzhuang and Zhudun areas along Zhen① fault with dense faults.The shear stress distribution is banding alternating dextrorotatory region with levorotatory region,and the development of north-northeast normal faults is controlled by dextrorotatory maximum shear stress and minimum principal stress.The development of near east-west normal faults is controlled by levorotatory maximum shear stress and minimum principal stress.

关 键 词：高邮凹陷 断阶带 断裂特征 断层落差 应力场 成因机制 

分 类 号：TE121.1[石油与天然气工程—油气勘探]