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根据库仑 摩尔黏性或非黏性摩擦材料的塑性变形和破坏理论 ,制作了剪切模拟实验装置 ,以黏土、砂、水泥等作为不同厚度、不同成岩程度的砂泥岩地层的替代物 ,进行了大量断层涂抹层形成的剪切断裂实验。根据对实验结果的观测分析 ,认为处于泥岩成岩作用早期阶段的生长断层易形成断层涂抹层 ,非生长断层一般不形成涂抹层 ;断层的初期活动对形成涂抹层起积极作用 ,再次活动对涂抹层起破坏作用 ;断层涂抹层的分布长度与断移泥岩层的厚度、泥岩含水量、一定范围内的断距呈正比关系 ,涂抹层的厚度与断移泥岩层的厚度、泥岩含水量呈正比关系 ,与断距呈反比关系。这一物理模拟实验研究为揭示断层涂抹层的地下发育规律、定量研究断层对油气的封闭性提供了依据。图4表2参5
According to the plastic deformation and failure theory of Coulomb Molar viscous or non-viscous friction materials, a shear simulation experiment device was made. Clay, sand and cement were used as substitutes for sandstone and mudstone with different thickness and diagenesis degree Large number of fault smear layer shear fracture test. According to the observation and analysis of the experimental results, it is considered that the growth fault in the early stage of mudstone diagenesis is easy to form the fault smear layer, and the non-growth fault does not generally form the smear layer; the initial activity of the fault plays a positive role in forming the smear layer, The distribution length of the fault smear layer is in direct proportion to the thickness of broken mudstone layer, the water content of mudstone and the breaking distance in a certain range. The thickness of smear layer is in direct proportion to the thickness of mudstone layer and the water content of mudstone , And the inverse distance is inversely related. This physical simulation experiment reveals the underground development of the fault smear and provides a basis for the quantitative study of fault sealing of oil and gas. Figure 4 Table 2 Reference 5