雕9柔忆鳞 2010年12月
现代地质 CEOSCIENCE
周口坳陷叶鲁断裂带构造特征及其演化白桦，杨明慧12，曾鹏，王金秀"，黄万国
VoL 24Na.6
Der.2010
0
3.中国石油集困瀚海钻探工程有限公司第一录井分公司，天津300457）
摘要：叶鲁断裂带位于华北克拉通南部，是鲁山－舞阳～阜阳-准南断裂带的重要组成部分，控制着周口场陷谭庄、舞阳等凹陷的形成与演化。据钻井、地震剖面解释和平衡剖面分析，在秦岭－大别造山带挤压活动的影响下，叶鲁断裂带在晚侏罗世一早白墨世向NNE方向强烈逆冲，主断层面倾角约37°，伸展率可达-22m/Ma；晚白垩世一古近纪，周口坳陷处于伸展构造环境，该断裂带发生负反转构造作用。通过三角剪切软件模拟了叶鲁断裂带主断层在周参12井区的构造演化过程。模拟显示主断层形成时的总滑动量约为6100m，断层传播量为9150m，三角剪切角为150°，p/s 值为1.5。
关键词：周口坳陷；叶鲁断裂带；构造特征；构造演化；三角剪切模型
中图分类号：TE121.2
文献标志码：A
文章编号：10008527(2010)06-103507
StructuralFeaturesandEvolutionofYeluFaultBeltinZhoukou
Depression,SouthernNorthChina
BAI Hua', YANG Ming-hui'-2, ZENG Peng', WANG Jin-xiu', HUANC Wan-guo”
(1. College of Geosciences, China Unitersity of Petroleum, Bejing102249,China;
2. Stale Key Laboratory of Peroleum Resowroes and Prospecting, China Uniersity of Petroleum, Bejing102249, China; 3. The First Branch Mud Logging Company, CNPC Bohai Drilling Enginering Ca. Lid. , Tianjin300457, China)
Abstract: Located in the southem North China Craton, Yelu fault belt is an important part of Lushan-Wuyang Fuyang-Huainan fault belt, which controls the formation and evolution of Tanzhuang Sag and Wuyang Sag in Zhoukou depression. It was affirmed through drilling analysis, seismic profile interpretation and balanced cross section analysis that under the influence of Qinling-Dabie orogenic activity, Yelu fault belt strongly thrusted to wards NNE, with about 37° fault dip and fault activity rate of -22 m/Ma during the Late Jurassic and Early Cretaceous; occurred in the Late Cretaceous and Paleogene, the negative inversion of Yelu fault belt was related to the extensional environment in Zhoukou depression. The tri-shear model is applied to stimulating the structur al and evolutionary processes of Yelu fault belt nearby the well ZC 12. The result shows that during the Late Ju-rassic and Early Cretaceous, fault slip of Yelu fault belt amounts to 6,100 m, and fault propagation is 9,150 m as well as p/s is 1. 5, with the trishear angel of 150°.
Key words: Zhoukou depression; Yelu fault belt; structural feature; structural evolution; trishear model
0引言
含油气区；然而，经过30多年的勘探，目前仍未获得大的突破。究其原因可能与该区构造运动频
周口坳陷是华北克拉通南部极具勘探潜力的繁、构造改造强烈有关。前人针对周口坳陷的断收稿日期：2010-07-10；改国日期：2010-10-20；责任编辑：孙义梅。
基金项目：国家自然科学基金重点项目（90814005）；中国石油大学（北京）油气资源与探测国家重点实验室开放基金项目
(2008002)。
作者简介：白棒，男，硕士研究生，1985年出生，构造地质学专业，主要从事油区构查解析和盆地分析方面的研究工作。
Email; beihus1282@ 163. com