大庆萨尔图油田南三区西部断层成因机制研究
发布时间：2018-10-24 07:56
【摘要】：南三区西部地处萨尔图背斜构造高点,断层极其发育,最大构造面落差100米,断层附近岩石破碎严重,井数少,断点组合与构造认识难度大。为了能够更好的改善开采效果,研究本区的注水开发、聚合物驱、剩余油的分布规律,增加老油区的储量,有必要对南三西的断层成因及分布规律进行再认识。本文通过南三区现有断层的分布特征、产状特征及不同组合样式分析断层形成时岩层的受力情况,更好地识别小断层,研究断层的成因。南三区T11断层系有两种成因,一类是沉积时期活动的生长断层,一类是沉积后形成的后生断层。生长断层较少,为伸展作用成因;大多数断层不具有活动性,而且集中发育在背斜的核部,为嫩江期末褶皱反转期形成的。由于东西向的挤压作用,大庆长垣隆升为背斜构造,上部岩层在在纵弯褶皱的作用下张裂形成一系列正断层。下部的T2断层系集中发育于青山口组地层的底界面,为坳陷早期的同沉积断层,断裂变形与沉积同时发生,多数断层为生长断层,证明该沉积时期处于拉张环境,T2断层系的成因机制为青山口早期的区域伸展作用。由于强烈的褶皱作用和岩层之间的层面滑移作用,造成青一段早期发育的正断层面倾向倒转,合理解释了南三区西侧发育的高角度逆断层成因。
[Abstract]:The west of the third area is located at the high point of the Saartu anticline, the fault is extremely developed, the maximum drop of the tectonic plane is 100 meters, the rock near the fault is badly broken, the number of wells is few, and it is difficult to understand the fault point combination and structure. In order to improve the production effect, study the distribution law of water flooding, polymer flooding and remaining oil in this area, and increase the reserves of the old oil area, it is necessary to re-understand the formation and distribution law of faults in the south and west. In this paper, the distribution characteristics, occurrence characteristics and different combination styles of existing faults in South three regions are used to analyze the stress of rock strata when faults are formed, to better identify small faults and to study the origin of faults. There are two kinds of genesis of T11 fault system in the south third area, one is the active growth fault in sedimentary period, the other is the epigenetic fault formed after sedimentation. Most of the faults are not active and are concentrated in the nucleus of the anticline which was formed during the late Nenjiang fold inversion period. As a result of east-west compression, Daqing Placanticline uplift is an anticline structure, and a series of normal faults are formed in the upper rock layer under the action of longitudinal bend and fold. The T _ 2 fault system of the lower part is concentrated on the bottom interface of the strata of Qingshankou formation, which is the synsedimentary fault in the early stage of depression. The fault deformation and deposition occur simultaneously, and most of the faults are growth faults. It is proved that the sedimentary period is in an extensional environment and the genetic mechanism of T2 fault system is the early regional extension of Qingshankou. As a result of the strong fold action and the layer slip between the strata, the positive fault plane developed in the early stage of Qingyi member tends to reverse, which reasonably explains the origin of the high angle reverse fault developed in the west side of the south third area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13
本文编号：2290786
[Abstract]:The west of the third area is located at the high point of the Saartu anticline, the fault is extremely developed, the maximum drop of the tectonic plane is 100 meters, the rock near the fault is badly broken, the number of wells is few, and it is difficult to understand the fault point combination and structure. In order to improve the production effect, study the distribution law of water flooding, polymer flooding and remaining oil in this area, and increase the reserves of the old oil area, it is necessary to re-understand the formation and distribution law of faults in the south and west. In this paper, the distribution characteristics, occurrence characteristics and different combination styles of existing faults in South three regions are used to analyze the stress of rock strata when faults are formed, to better identify small faults and to study the origin of faults. There are two kinds of genesis of T11 fault system in the south third area, one is the active growth fault in sedimentary period, the other is the epigenetic fault formed after sedimentation. Most of the faults are not active and are concentrated in the nucleus of the anticline which was formed during the late Nenjiang fold inversion period. As a result of east-west compression, Daqing Placanticline uplift is an anticline structure, and a series of normal faults are formed in the upper rock layer under the action of longitudinal bend and fold. The T _ 2 fault system of the lower part is concentrated on the bottom interface of the strata of Qingshankou formation, which is the synsedimentary fault in the early stage of depression. The fault deformation and deposition occur simultaneously, and most of the faults are growth faults. It is proved that the sedimentary period is in an extensional environment and the genetic mechanism of T2 fault system is the early regional extension of Qingshankou. As a result of the strong fold action and the layer slip between the strata, the positive fault plane developed in the early stage of Qingyi member tends to reverse, which reasonably explains the origin of the high angle reverse fault developed in the west side of the south third area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13
【参考文献】
相关期刊论文 前1条
1 侯艳平;任建业;任延广;庄新国;王雅峰;;松辽盆地北部姚家组一段层序地层格架及形成机制[J];石油与天然气地质;2008年04期
，本文编号：2290786
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