【摘要】：南三區(qū)西部地處薩爾圖背斜構(gòu)造高點(diǎn),斷層極其發(fā)育,最大構(gòu)造面落差100米,斷層附近巖石破碎嚴(yán)重,井?dāng)?shù)少,斷點(diǎn)組合與構(gòu)造認(rèn)識(shí)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(qū)、剩余油的分布規(guī)律,增加老油區(qū)的儲(chǔ)量,有必要對(duì)南三西的斷層成因及分布規(guī)律進(jìn)行再認(rèn)識(shí)。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(shí)巖層的受力情況,更好地識(shí)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(shí)期活動(dòng)的生長(zhǎng)斷層,一類是沉積后形成的后生斷層。生長(zhǎng)斷層較少,為伸展作用成因;大多數(shù)斷層不具有活動(dòng)性,而且集中發(fā)育在背斜的核部,為嫩江期末褶皺反轉(zhuǎn)期形成的。由于東西向的擠壓作用,大慶長(zhǎng)垣隆升為背斜構(gòu)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(shí)發(fā)生,多數(shù)斷層為生長(zhǎng)斷層,證明該沉積時(shí)期處于拉張環(huán)境,T2斷層系的成因機(jī)制為青山口早期的區(qū)域伸展作用。由于強(qiáng)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(zhuǎn),合理解釋了南三區(qū)西側(cè)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(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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本文編號(hào)：2290786