本文選題：遼中凹陷 + 構(gòu)造樣式��； 參考：《成都理工大學(xué)》2015年碩士論文

【摘要】：本文以區(qū)域地質(zhì)、地震和鉆井資料為基礎(chǔ),從地震資料構(gòu)造解釋入手,結(jié)合前人研究成果,對(duì)遼中凹陷主干斷裂帶的結(jié)構(gòu)特征和演化特征進(jìn)行了深入研究,總結(jié)了遼中凹陷及其鄰區(qū)構(gòu)造樣式特征,并分析了各種類型構(gòu)造樣式的成因。最后結(jié)合油氣成藏要素,分析了構(gòu)造樣式與油氣的關(guān)系。遼中凹陷主干斷裂帶控制了遼中凹陷整體構(gòu)造格局,并將遼中凹陷及其鄰區(qū)分為東部凸起帶、中部凹陷帶以及西部凸起帶。遼中1號(hào)斷裂帶從南向北貫穿了整個(gè)遼中凹陷,沿著走向方向斷裂性質(zhì)有差異,主要表現(xiàn)為伸展性質(zhì),走滑性質(zhì),伸展-走滑疊加復(fù)合性質(zhì)。遼中2號(hào)斷裂帶發(fā)育在遼中凹陷的北部,主要表現(xiàn)為走滑性質(zhì),沿走向方向斷裂的傾向有差異,表現(xiàn)了走滑斷裂的絲帶效應(yīng)。遼西3號(hào)斷裂帶主要發(fā)育在遼東灣北部地區(qū),整體表現(xiàn)為伸展性的正斷層。遼中凹陷及其鄰區(qū)發(fā)育的構(gòu)造樣式主要有伸展構(gòu)造樣式、走滑構(gòu)造樣式、伸展-走滑疊加復(fù)合構(gòu)造樣式,局部地區(qū)在斷裂的作用下伴生底辟構(gòu)造樣式和反轉(zhuǎn)構(gòu)造樣式。遼中凹陷主干斷裂帶的主要活動(dòng)期次為:①強(qiáng)烈伸展活動(dòng)期:孔店組到沙河街組三段沉積時(shí)期,遼中1號(hào)斷裂、遼中2號(hào)斷裂和遼西3號(hào)斷裂均表現(xiàn)為伸展活動(dòng);②右旋走滑活動(dòng)期:東營組三段和東營組二沉積期,在郯廬斷裂帶右旋走滑作用下,三條主干斷裂帶在不同程度上均遭受到了利用和改造。③反轉(zhuǎn)活動(dòng)期:東營組一段沉積末期,盆地發(fā)生區(qū)域性抬升導(dǎo)致局部地區(qū)斷裂發(fā)生反轉(zhuǎn)活動(dòng)。④弱走滑-伸展活動(dòng)期:館陶組-平原組沉積期,遼中1號(hào)斷裂和遼中2號(hào)斷裂整體上表現(xiàn)為較弱的走滑活動(dòng),遼西3號(hào)斷裂表現(xiàn)為較弱的伸展活動(dòng)或者靜止。遼中凹陷主干斷裂帶伸展和走滑活動(dòng)形成了多種類型的構(gòu)造樣式,從而導(dǎo)致了圈閉的多樣性,其中深層圈閉的形成與斷裂的伸展活動(dòng)相關(guān),淺層圈閉的形成與斷裂的走滑活動(dòng)相關(guān)。遼中凹陷主干斷裂帶溝通了下部的烴源巖和上部的圈閉,可以作為油氣垂向的運(yùn)移通道。
[Abstract]:Based on the regional geological, seismic and drilling data, the structural and evolutionary characteristics of the main fault zone in the central Liaoning sag are studied in this paper, starting with the structural interpretation of the seismic data and combining with the previous research results. This paper summarizes the structural style characteristics of the central Liaoning sag and its adjacent areas, and analyzes the genesis of various types of structural styles. Finally, the relationship between structural style and oil and gas is analyzed in combination with oil and gas accumulation elements. The main fault zone of the central Liaoning sag controls the whole tectonic structure of the central depression, and divides the central depression and its neighbors into the eastern uplift zone, the central sag zone and the western uplift zone. Liaozhong No. 1 fault zone runs through the whole Liaozhong sag from south to north, and the fault properties along the strike direction are different, mainly showing extensional property, strike-slip property, extension-strike-slip superposition property. The No. 2 fault zone of Liaozhong developed in the northern part of Liaozhong sag, which is mainly characterized by strike-slip, and the tendency of faults along strike direction is different, which shows the ribbon effect of strike-slip fault. The No. 3 fault zone in western Liaoning is mainly developed in the northern part of Liaodong Bay, which is an extensional normal fault. The structural styles developed in the central Liaoning sag and its adjacent areas mainly include extensional structural style, strike-slip structural style, extension-strike-slip superimposed composite structural style, and the diapir structural style and reverse structural style associated with the fault in the local area. The main active stage of the main fault zone in the central Liaoning sag is the stage of strong extensional activity: the third member sedimentary period from Kongdian formation to Shahejie formation, Liaozhong No. 1 fault, Liaozhong No. 2 fault and Liaoxi No. 3 fault all show extensional activity; (2) dextral strike-slip activity: the third member of Dongying formation and the second sedimentary period of Dongying formation, under the action of right-lateral strike-slip in the Tanlu fault zone, The three main fault zones were all subjected to the reverse activity period of utilization and transformation in varying degrees: the end of the first member of the Dongying formation, the late depositional period of the first member of the Dongying formation, The occurrence of regional uplift in the basin leads to the inversion of fault activities in the local area. 4. The weak strike slip and extensional period: the sedimentary period of Guantao formation and plain formation, and the faults of Liaozhong 1 and Liaozhong 2 show weaker strike-slip activities as a whole. Fault No. 3 in western Liaoning shows weak extensional activity or quiescence. The extension and strike-slip activities of the main fault zone in the central Liaoning sag have formed many types of structural styles, resulting in the diversity of traps, in which the formation of deep traps is related to the extensional activities of the faults. The formation of shallow traps is related to the strike-slip activity of faults. The main fault zone in the central Liaoning sag connects the lower source rock with the upper trap and can be used as the vertical migration channel of oil and gas.
【學(xué)位授予單位】：成都理工大學(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)：2011387