论文部分内容阅读
为了解沾化凹陷罗家地区油气运聚特征,对由高渗砂体的输导层、断层、不整合面和裂缝组合而成的输导体系进行了研究,发现罗家地区广泛发育断裂、高渗砂体、不整合面和裂缝多种类型输导体系,构成复杂的立体网络通道;以断层为垂向运移通道的油气藏常在断层带附近多层叠置;以连通砂体为主要运移通道的油气藏常是由于砂体上倾方向为断层所切割封堵而形成;不整合面作为运移通道往往可使油气长距离运移形成各种地层油气藏;同时裂缝是油气运移、聚集的有利场所。罗家地区的油气藏都是油气经过两种或多种输导层阶梯式运移而形成的,多个不整合面、油源断层、各层系储集砂体以及裂缝的空间配置对油气分布的控制方式很复杂。在断阶带上发育一系列沿边坡向洼陷中心延伸的断鼻构造、断层、不整合面及裂缝的罗家地区往往是油气运移的重要指向区。
In order to understand the characteristics of hydrocarbon migration and accumulation in the Luojia area of Zhanhua Depression, the study on the transmission system made up of the combination of the permeability layer, fault, unconformity surface and fracture of the high permeability sand body shows that extensively developed faults in Luojia area, Hypertonic sand bodies, unconformities and fractures, which form complex three-dimensional network channels. The reservoirs with faults as vertical migration channels are often stacked in layers near fault zones. Oil and gas reservoirs in migration channels are usually formed by cutting and sealing of faults in the upwelling direction of sand body. Unconformity surfaces often act as migration channels to transport oil and gas over long distances to form various stratigraphic reservoirs. At the same time, Move, gather a good place. The oil and gas reservoirs in the Luojia area are all formed by the stepwise migration of two or more kinds of transport layers. Many unconformities, oil source faults, reservoir sand bodies of various strata and the spatial distribution of fractures are responsible for the oil and gas Distribution of control is very complicated. In the fault zone, a series of faultless nose structures, faults, unconformities and fractures extending along the slope to the center of the depression are often developed as important points for oil and gas migration.