论文部分内容阅读
从机理上看,影响断层封闭性的主要因素包括:涂抹作用、碎裂作用及成岩作用。其中成岩作用是静止期断层逐渐封闭的主导因素,其类型主要包括:压实和充填作用、胶结作用,二者对断层的封闭性均具有建设性作用。根据地震、测井、录井及试油等基础资料,运用定量计算的方法,并结合岩心和岩石薄片观察,对准噶尔盆地西北缘夏红北断裂内成岩作用进行了研究。结果表明:由于夏红北断裂内压实和充填作用强烈,致使该断裂的封闭性较好,对油气具有良好的封堵作用。加之受胶结作用的影响,使断裂带与相邻围岩相比具有较低的孔隙度和渗透率。最后通过断裂带结构划分,结合岩心和岩石薄片观察,初步认为夏红北断裂内成岩胶结作用的影响范围约为50~70m。
From the mechanism point of view, the main factors affecting the fault sealing include: smearing, fragmentation and diagenesis. Diagenesis is the dominant factor in the gradual closure of quiescent faults. The types of diagenesis include: compaction, filling and cementation, both of which play a constructive role in fault sealing. According to the basic data of seismic, well logging, logging and oil testing, the diagenesis of Xia Hong Bei fault in the northwestern margin of Junggar Basin was studied by quantitative calculation method combined with the observation of core and rock slices. The results show that due to the strong compaction and filling in the Xiahongbei fault, the sealing of the fault is good and the blockage of the oil and gas is well. Coupled with the influence of cementation, the fault zone has lower porosity and permeability than the adjacent wall rocks. Finally, through the structural division of the fault zones and the observation of the core and the rock slices, it is initially considered that the influence range of the inner-diagenetic cementation of the Xiahongbei fault is about 50-70 m.