【摘要】：南三區(qū)西部地處薩爾圖背斜構造高點,斷層極其發(fā)育,最大構造面落差100米,斷層附近巖石破碎嚴重,井數(shù)少,斷點組合與構造認識難度大。為了能夠更好的改善開采效果,研究本區(qū)的注水開發(fā)、聚合物驅、剩余油的分布規(guī)律,增加老油區(qū)的儲量,有必要對南三西的斷層成因及分布規(guī)律進行再認識。本文通過南三區(qū)現(xiàn)有斷層的分布特征、產(chǎn)狀特征及不同組合樣式分析斷層形成時巖層的受力情況,更好地識別小斷層,研究斷層的成因。南三區(qū)T11斷層系有兩種成因,一類是沉積時期活動的生長斷層,一類是沉積后形成的后生斷層。生長斷層較少,為伸展作用成因;大多數(shù)斷層不具有活動性,而且集中發(fā)育在背斜的核部,為嫩江期末褶皺反轉期形成的。由于東西向的擠壓作用,大慶長垣隆升為背斜構造,上部巖層在在縱彎褶皺的作用下張裂形成一系列正斷層。下部的T2斷層系集中發(fā)育于青山口組地層的底界面,為坳陷早期的同沉積斷層,斷裂變形與沉積同時發(fā)生,多數(shù)斷層為生長斷層,證明該沉積時期處于拉張環(huán)境,T2斷層系的成因機制為青山口早期的區(qū)域伸展作用。由于強烈的褶皺作用和巖層之間的層面滑移作用,造成青一段早期發(fā)育的正斷層面傾向倒轉,合理解釋了南三區(qū)西側發(fā)育的高角度逆斷層成因。
[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.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.13

【參考文獻】

相關期刊論文 前1條

1 侯艷平;任建業(yè);任延廣;莊新國;王雅峰;;松遼盆地北部姚家組一段層序地層格架及形成機制[J];石油與天然氣地質(zhì);2008年04期

，

本文編號：2290786