三肇凹陷徐家围子油田葡萄花油层断裂控藏规律再认识
发布时间：2018-11-02 17:40
【摘要】：本文主要对松辽盆地三肇凹陷青山口组泥岩底界面(T2反射层)和顶界面(T11反射层)的断层几何学特征进行了对比分析,在此基础上对该地区的断层的运动学特征及其成因机制进行了系统的解析,认为其构造成因是T2反射层的高密度断层。在青山口组沉积时期早期由于近东西向拉张应力场作用,在青山口组塑性泥岩底界面(T2反射层)形成了受斜向裂陷作用、差异伸展作用、基底断裂及火山口的联合控制的多条不同延伸方位的断裂密集带。T11反射层断裂密集带依然发育,展布特征与T2断裂系一致,表明断裂形成时受T2断裂影响较大,但两者之间并不是一条断裂的简单继承性生长的结果,而是垂向分段生长连接的结果。野外观察、典型地震解剖和物理模拟证实,只要岩石存在能干性差,断层具有典型垂向分段生长特征。岩石能干性差异决定断层演化历经三个阶段:下部断层形成、断裂上下分段和贯通性断裂形成。通过徐家围子向斜区断裂重新解释,应用岩石力学特征和断层相关褶皱理论,明确了断裂垂向分段生长的特征,虽然T11断裂与T2断裂虽然分段生长,相互连接性差,但是其发育受T2断裂系的影响较大,应力的传递通常是通过两断层系叠覆的岩桥区实现的。通常断层垂向叠覆的方式有两种类型:限制型叠覆带和释放型叠覆带。三肇凹陷T11与T2断裂系的叠覆类型以限制型叠覆为主,叠覆部位地层通常发生褶皱或旋转。结合断裂的几何发育及生长演化特征,依据成藏期断裂的活动性和沟通源储情况,对研究区油源断裂进行重新厘定。利用工区探评井的生产数据,以松辽盆地升西—徐家围子向斜葡萄花油层为解剖对象,通过对研究区葡萄花油层油水的分布规律及其与断裂的关系的解析,明确了研究区内断裂对油水分布的控制作用。研究区油水分布主要受断裂密集带控制,油平面上受断层密集带背形构造控制呈”条带状”分布,垂向上受沉积演化序列和微相物性差异影响”择层”分布。油井多分布在密集带内两条断裂的交叉点处和密集带的交叉点处,换句话来说,密集带控油的根本就是断裂或断裂带的交叉点控制油藏的分布。而研究区北部的宋芳屯、升平等油田由于断层多期活动,加之油源供给不足在纵向上呈现下水上油的分布模式。
[Abstract]:In this paper, the fault geometries of the bottom interface of mudstone (T2 reflection layer) and top interface (T11 reflection layer) of Qingshankou formation in Sanzhao depression of Songliao Basin are compared and analyzed. On this basis, the kinematic characteristics and genetic mechanism of the faults in this area are systematically analyzed, and the tectonic origin is considered to be the high-density fault of the T2 reflection layer. In the early sedimentary period of Qingshankou formation, due to the near east-west tensile stress field, the ductile mudstone bottom interface (T2 reflection layer) of Qingshankou formation was subjected to oblique fissure and differential extension. There are several fault-dense zones controlled by basement faults and crater with different extension azimuth. T11 reflection layer fault dense zone is still developed, and the distribution characteristics are consistent with T2 fault system, indicating that the fault formation is greatly affected by T2 fault. But it is not the result of the simple succession growth of a fracture, but the result of vertical piecewise growth. Field observation, typical seismic anatomy and physical simulation confirm that the fault has typical vertical segmental growth characteristics as long as there is poor capability of rock. The difference of rock capability determines that the fault evolution goes through three stages: the formation of the lower fault, the formation of the upper and lower sections of the fault and the formation of the penetrating fault. Through the reinterpretation of the faults in the Xujiaweizi syncline, the vertical sectional growth characteristics of the faults are determined by applying the rock mechanics characteristics and the fault-related fold theory, although the T11 and T2 faults grow in stages, their interconnectedness is poor. However, its development is greatly affected by T2 fault system, and the stress transfer is usually achieved through the rock bridge area overlaid by the two fault systems. There are usually two types of fault vertical overlay: restricted overlay and release overlay. The overlay types of T11 and T2 fault systems in Sanzhao depression are mainly restricted overlay, where the strata usually fold or rotate. Combined with the geometric development and growth evolution of the faults, the oil-source faults in the study area were redetermined according to the activity of the faults during the reservoir forming period and the source storage. Based on the production data of exploratory wells in Songliao Basin, this paper analyzes the distribution of oil and water and its relationship with faults in the Xixi-Xujiaweizi syncline of the Songliao Basin. The controlling effect of faults on the distribution of oil and water in the study area is clarified. The distribution of oil and water in the study area is mainly controlled by the fault dense zone, the oil plane is controlled by the back structure of the fault dense belt, and the vertical distribution is influenced by the sedimentary evolution sequence and the difference of the microfacies physical properties. The oil wells are mostly distributed at the intersection of two faults in the dense zone and the intersection of the dense zone. In other words, the basic of the oil control in the dense belt is the distribution of the reservoir controlled by the crossing point of the fault or fault zone. The oil fields of Songfangtun and Shengping in the north of the study area show the distribution pattern of oil in water longitudinally due to the multi-stage activity of faults and the insufficient supply of oil source.
【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
[Abstract]:In this paper, the fault geometries of the bottom interface of mudstone (T2 reflection layer) and top interface (T11 reflection layer) of Qingshankou formation in Sanzhao depression of Songliao Basin are compared and analyzed. On this basis, the kinematic characteristics and genetic mechanism of the faults in this area are systematically analyzed, and the tectonic origin is considered to be the high-density fault of the T2 reflection layer. In the early sedimentary period of Qingshankou formation, due to the near east-west tensile stress field, the ductile mudstone bottom interface (T2 reflection layer) of Qingshankou formation was subjected to oblique fissure and differential extension. There are several fault-dense zones controlled by basement faults and crater with different extension azimuth. T11 reflection layer fault dense zone is still developed, and the distribution characteristics are consistent with T2 fault system, indicating that the fault formation is greatly affected by T2 fault. But it is not the result of the simple succession growth of a fracture, but the result of vertical piecewise growth. Field observation, typical seismic anatomy and physical simulation confirm that the fault has typical vertical segmental growth characteristics as long as there is poor capability of rock. The difference of rock capability determines that the fault evolution goes through three stages: the formation of the lower fault, the formation of the upper and lower sections of the fault and the formation of the penetrating fault. Through the reinterpretation of the faults in the Xujiaweizi syncline, the vertical sectional growth characteristics of the faults are determined by applying the rock mechanics characteristics and the fault-related fold theory, although the T11 and T2 faults grow in stages, their interconnectedness is poor. However, its development is greatly affected by T2 fault system, and the stress transfer is usually achieved through the rock bridge area overlaid by the two fault systems. There are usually two types of fault vertical overlay: restricted overlay and release overlay. The overlay types of T11 and T2 fault systems in Sanzhao depression are mainly restricted overlay, where the strata usually fold or rotate. Combined with the geometric development and growth evolution of the faults, the oil-source faults in the study area were redetermined according to the activity of the faults during the reservoir forming period and the source storage. Based on the production data of exploratory wells in Songliao Basin, this paper analyzes the distribution of oil and water and its relationship with faults in the Xixi-Xujiaweizi syncline of the Songliao Basin. The controlling effect of faults on the distribution of oil and water in the study area is clarified. The distribution of oil and water in the study area is mainly controlled by the fault dense zone, the oil plane is controlled by the back structure of the fault dense belt, and the vertical distribution is influenced by the sedimentary evolution sequence and the difference of the microfacies physical properties. The oil wells are mostly distributed at the intersection of two faults in the dense zone and the intersection of the dense zone. In other words, the basic of the oil control in the dense belt is the distribution of the reservoir controlled by the crossing point of the fault or fault zone. The oil fields of Songfangtun and Shengping in the north of the study area show the distribution pattern of oil in water longitudinally due to the multi-stage activity of faults and the insufficient supply of oil source.
【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10条
1 王海学;付晓飞;付广;吕延防;杜微;刘桐汐;;三肇凹陷断层垂向分段生长与扶杨油层油源断层的厘定[J];地球科学(中国地质大学学报);2014年11期
2 刘宗堡;崔羽西;方庆;刘性全;仇翠莹;于s，
本文编号：2306486
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2306486.html
