关键词: 盐丘构造, 正断层, 成因机制, 中原油田, 构造模拟实验, 位移边界条件, 应力场, 实验材料, 文留地区, 地震构造图

Abstract: This paper discusses certain problems related to the mechanism of formation of the salt-dome structures and listric normal fault in Zhong-Yuan oil field, North China. In order to explain such mechanism, we have conducted a series of modelling tests related to tectonic phenomena of salt-dome and listric normal fault. The experimental results indicate that formation of salt-dome was controlled by mechanical and physical properties of rock, vertical displacement boundary condition of the basement, and tensile stress field. In our modelling, it has been observed that the development of listric normal fault usually varies with depth. During formation and evolution of salt-dome and listric normal fault, they are subjected from regional tensile, derived from the inplate movement or that between block and plate combined with the shear-tensile stress from the upward gravity gliding of the rock salt formation.