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SN4井获高产天然气流揭示塔里木盆地深层-超深层具有巨大油气勘探潜力,然而目的层段埋藏深、勘探程度低,其储层发育机理和分布规律仍备受争议.从宏观和微观上着手,运用三维地震精细解释技术分析了顺南地区断裂构造发育以及碳酸盐岩储层空间展布特征,并结合岩相岩石学和流体包裹体分析技术判定了碳酸盐岩成岩作用类型,从而总结出顺南地区中-下奥陶统断控型深成岩溶储层形成机制.研究结果表明,顺南地区主要经历4期构造运动:加里东早期、加里东中期、加里东晚期-海西早期和海西晚期;NE向走滑断裂的形成和改造主要与加里东中期和加里东晚期-海西早期两期构造活动有关.深成岩溶作用在顺南地区大规模发育,并与NE向走滑断裂具有很好的耦合关系:平面上,深成岩溶主要沿SN4断裂带发育,具有明显的分段性;剖面上,深部流体在垂向上的运移主要受张性走滑断裂的控制,其在横向上的运移则主要受先存渗流带的控制.深成岩溶主要顺着张性走滑断裂发育,侧向上受鹰山组上段砂屑灰岩相带的约束.
However, the exploration depth is low in the Tarim Basin, and the development mechanism and distribution of the reservoirs are still in dispute.From the macroscopical and microscopic perspectives, By means of three-dimensional seismic interpretation technique, the fault structure and the spatial distribution of carbonate reservoirs in Shunnan area are analyzed, and the diagenesis types of carbonate rocks are judged according to lithofacies and fluid inclusion analysis. The results show that Shunnan mainly experienced four tectonic movements: early Caledonian, middle Caledonian, late Caledonian-early Hercynian and The Hercynian strike-slip faulting is mainly related to the Middle Caledonian and Caledonian-Early Hercynian tectonic activities.The deep karstification developed on a large scale in the Shunnan area and was associated with the NE strike-slip fault It has a good coupling relationship: on the plane, deep karstification mainly develops along SN4 fault zone and has obvious segmentality. In the section, the migration of deep fluid in the vertical direction is mainly affected by The control of sexual strike-slip faults is mainly controlled by the pre-existing seepage zone in the lateral direction, and the deep karstification developed along the Zhang-strike strike-slip faults and laterally by the sandstone and limestone facies in the upper part of the Yingshan Formation constraint.