库车东地区前中生界不整合及其油气地质意义

前中生界不整合是库车东地区一个非常重要的不整合面，是海西晚期运动的直接产物。通过三维地震解释结
合钻井和区域地质资料，分析了前中生界不整合的不整合类型、平面分布规律及其对油气藏的控制作用。研究表明，
前中生界不整合主要发育平行不整合、异常不整合、削截不整合和超覆不整合。平行不整合分布在阿克库勒凸起，雅
克拉断凸东段分布异常不整合，削截不整合与超覆不整合分布在库车拗陷。与不整合相关的圈闭类型有两种，不整合
面之上的地层超覆圈闭和不整合面之下的古潜山圈闭。前中生界不整合是油气侧向运移的有利通道，油气沿不整合
由拗陷中心向南运移，进入与不整合有关的圈闭后聚集成藏。

Pre-Mesozoic Unconformity and Its Significance for Hydrocarbon Exploration in Kuchedong Area

Pre-Mesozoic unconformity is an important unconformity in Kuchedong Area，which is the direct product of the
late Hercynian movement. Based on 3D seismic interpretation data，combined with well drilling data and regional geology，
we analyzed the main unconformity types，planar distribution of pre-Mesozoic unconformity and its control over oil and gas
reservoirs. The research shows that the types of the unconformity can be divided into parallel unconformity，abnormal unconformity，
truncation unconformity and overlaping unconformity. Parallel unconformity mainly occurs in Akekule uplift，abnormal
unconformity exists in the eastern part of the Yakela faulted uplift，and truncation unconformity and overlaping unconformity
occur in Kuqa Depression. There are two types of unconformity related traps；stratigraphic overlaping trap above the unconformity
surface and buried hill traps below the unconformity. Pre-Mesozoic unconformity is favorable oil and gas lateral migration
channel. Oil and gas migrate along the unconformity from the depression center to south，and enter unconformity related traps
forming oil and gas reservoirs.