东营凹陷北部陡坡带断层应力封闭研究  

Characteristics of Stress Sealing of Fault in North Zone of Dongying Basin

作　　者：吴李泉[1] 曹代勇[2] 郝银全[3] 张立勤[2] 

机构地区：[1]浙江科技学院土木系,浙江杭州310012 [2]中国矿业大学煤炭资源教育部重点实验室,北京100083 [3]中国石油勘探开发研究院,北京100083

出　　处：《中国矿业大学学报》2006年第3期414-418,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(40201051;20377051);国家"863"项目(2005AA644020)

摘　　要：断层封闭性研究是油气勘探开发过程中重点难点研究内容之一．本文运用构造力学原理和方法，通过计算东营凹陷北部陡坡带地区的断层应力特征，研究了断层应力特征随断层埋深变化的演化规律，并探讨了断层应力与断层封闭性随断层埋深变化之间的关系规律．结果发现，断层应力、断层性质和断层封闭性在浅部是张性开启的，而在深部是压性封闭的，中部（1650-2000m）则存在一个断层性质和封闭的过渡段，即断层性质和断层封闭性的转换段．Fault Sealing Characteristics is one of the most important content in oil-gas exploration and development. By using structural mechanism and calculating fault plane stress （σ and τ）in the northern slope zone of Dongying basin, this paper presents the stress of fault plane changing with depth and the changing rule of fault plane stress and fault sealing with the depth. The results reveals that the fault nature changes with depth, which can be classified into three segments. 1） extensional and open to gas-oil（〈1 650 m）; 2） transitional （1 650-2 000 m） ; 3） compressive and sealing to gas-oil（〉2 000 m）. Because the fault stress is quantitatively calculated and only a few major factors are taken into account while many other factors have not been taken into consideration, its correctness needs to be verified by using other methods.

关 键 词：东营凹陷 构造应力 断层封闭性 

分 类 号：P618.130.2[天文地球—矿床学] P618.1[天文地球—地质学]