本文選題：瓊東南盆地 + 北部坳陷帶��； 參考：《中國(guó)礦業(yè)大學(xué)》2015年碩士論文

【摘要】：本文以板塊構(gòu)造理論為基礎(chǔ),在瓊東南盆地區(qū)域構(gòu)造背景分析的基礎(chǔ)上,較為深入地研究了北部坳陷帶構(gòu)造特征及其演化歷史,并劃分了北部坳陷帶不同的構(gòu)造區(qū)塊;應(yīng)用斷層落差、斷層活動(dòng)速率及地質(zhì)演化平衡剖面等方法對(duì)研究區(qū)同沉積斷裂進(jìn)行了定量分析;探討了不同凹陷的聚煤模式,并結(jié)合北部坳陷帶崖城組沉積相特征,總結(jié)了構(gòu)造演化對(duì)崖城組煤系烴源巖發(fā)育的控制作用,探討了崖城組煤系烴源巖的分布規(guī)律,并進(jìn)行了潛在有利分布區(qū)的預(yù)測(cè)。主要取得了以下認(rèn)識(shí):(1)北部坳陷帶主要發(fā)育NE、NW、近WE向三組斷層,構(gòu)造樣式分為簡(jiǎn)單半地塹、復(fù)式半地塹、地塹及走滑構(gòu)造。受區(qū)域構(gòu)造事件的影響,北部坳陷帶構(gòu)造演化經(jīng)歷了斷陷期、斷坳期、區(qū)域熱沉降期、加速沉降期四個(gè)階段,形成了下斷上坳的構(gòu)造層序。(2)北部坳陷帶內(nèi)控凹斷裂主要為F5、F3、F6。F5斷層?xùn)|西段分別控制了崖北凹陷、松西凹陷的形成與演化,F6斷層則為松東凹陷的控凹斷裂。通過(guò)對(duì)斷層活動(dòng)性的定量分析認(rèn)為,斷層活動(dòng)性與區(qū)域演化保持一致,斷陷期活動(dòng)性較強(qiáng),漸新世時(shí)期為斷層主要活動(dòng)期,漸新世之后斷層活動(dòng)趨于穩(wěn)定。(3)北部坳陷帶崖城組主要的成煤沉積體系在崖城組早期主要為辮狀河三角洲-水下扇體系,在崖城組沉積中、晚期主要為潮坪-瀉湖體系。其中,辮狀河三角洲和潮坪環(huán)境最有利于成煤作用發(fā)生。通過(guò)對(duì)不同剖面內(nèi)煤層分布的預(yù)測(cè)認(rèn)為崖城組煤系主要發(fā)育在半地塹緩坡帶辮狀河三角洲和潮坪,其次是陡坡帶扇三角洲和潮坪。(4)構(gòu)造活動(dòng)控制了崖城組煤系烴源巖聚集。斷陷期及斷坳期構(gòu)造活動(dòng)較為強(qiáng)烈,形成了北部坳陷帶內(nèi)主要的烴源巖,區(qū)域熱沉降期僅在局部形成烴源巖。崖城組沉積期的聚煤作用,歸結(jié)于差異性構(gòu)造活動(dòng)控制下的沉積相帶的差異。(5)通過(guò)沉積和構(gòu)造相結(jié)合進(jìn)行分析,對(duì)研究區(qū)崖城組煤系烴源巖的分布進(jìn)行了預(yù)測(cè),認(rèn)為松東凹陷北側(cè)及崖南凹陷大型緩坡帶、崖北凹陷東部及南部緩坡帶、崖北凹陷西北部區(qū)域,同時(shí)松東、松西凹陷的過(guò)渡地帶為潛在有利勘探區(qū)。
[Abstract]:Based on the theory of plate tectonics and based on the analysis of the regional tectonic background of Qiongdongnan basin, the structural characteristics and evolution history of the northern depression are studied in depth, and the different tectonic blocks in the northern depression are divided. By using the methods of fault drop, fault activity rate and geological evolution equilibrium profile, the synsedimentary faults in the study area are quantitatively analyzed, the coal accumulation models in different sag are discussed, and the sedimentary facies characteristics of Yacheng formation in the northern depression are discussed. This paper summarizes the controlling effect of tectonic evolution on the development of source rocks of coal measures of Yacheng formation, probes into the distribution law of source rocks of coal measures of Yacheng formation, and forecasts the potential favorable distribution area. The main results are as follows: (1) the northern depression mainly developed three groups of faults, neuung NW, near we, and the structural style is divided into simple half graben, compound half graben, graben and strike-slip structure. Under the influence of regional tectonic events, the tectonic evolution of the northern depression experienced four stages, namely, the faulting stage, the fault depression stage, the regional thermal subsidence stage, and the accelerated subsidence period. The tectonic sequence of the lower and upper depression is formed. (2) the inner controlled concave fault in the northern depression is mainly controlled by the east and west segment of the F5F3F3F6.F5 fault, while the formation and evolution of the Songxi sag is the controlled concave fault of the Songdong depression, while the formation and evolution of the Songxi sag is controlled by the east and west segment of the fault. The quantitative analysis of fault activity shows that the fault activity is consistent with the regional evolution, the fault subsidence period is strong, and the Oligocene period is the main fault active period. The main coal-forming sedimentary system of Yacheng formation in the northern depression zone is braided river delta-underwater fan system in the early stage of Yacheng formation and the tidal flat lagoon system in the late stage of the Yacheng formation. Among them, braided river delta and tidal flat environment are most favorable for coal formation. Based on the prediction of coal seam distribution in different sections, it is considered that the coal measures of Yacheng formation are mainly developed in braided river delta and tidal flat of semi-graben gentle slope zone, followed by fan delta of steep slope zone and tidal flat .4) tectonic activity controls the accumulation of source rocks in coal measures of Yacheng formation. The tectonic activity of the fault depression and fault depression is relatively strong, forming the main source rocks in the northern depression zone, and the source rocks are formed only locally in the regional thermal subsidence period. The coal accumulation of Yacheng formation during sedimentary period is attributed to the difference of sedimentary facies belt controlled by different tectonic activities. The distribution of source rocks in coal measures of Yacheng formation in the study area is predicted through the combination of sedimentary and structural analysis. It is considered that the large gentle slope zone in the north side of Songdong Sag and Yanan sag, the gentle slope zone in east and south of Yabei depression, the northwestern region of Yabei sag, and the transition zone of Songdong and Songxi sag are potential favorable exploration areas.
【學(xué)位授予單位】：中國(guó)礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.13

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張功成;陳國(guó)俊;張厚和;李友川;梁建設(shè);楊樹(shù)春;;“源熱共控”中國(guó)近海盆地油氣田“內(nèi)油外氣”有序分布[J];沉積學(xué)報(bào);2012年01期

2 陳國(guó)達(dá);東亞陸緣擴(kuò)張帶──一條離散式大陸邊緣成因的探討[J];大地構(gòu)造與成礦學(xué);1997年04期

3 夏斌,崔學(xué)軍,張宴華,劉寶明,王冉,閆義;南海擴(kuò)張的動(dòng)力學(xué)因素及其數(shù)值模擬討論[J];大地構(gòu)造與成礦學(xué);2005年03期

4 鐘延秋;李勇;郭洪金;鐘建華;;濟(jì)陽(yáng)坳陷古近系同沉積背斜構(gòu)造及其與油氣的關(guān)系[J];大地構(gòu)造與成礦學(xué);2006年01期

5 徐義剛,黃小龍,顏文,劉穎,陳小明;南海北緣新生代構(gòu)造演化的深部制約(I):幔源包體[J];地球化學(xué);2002年03期

6 林暢松,潘元林,肖建新,孔凡仙,劉景彥,鄭和榮;“構(gòu)造坡折帶”——斷陷盆地層序分析和油氣預(yù)測(cè)的重要概念[J];地球科學(xué);2000年03期

7 解習(xí)農(nóng);張成;任建業(yè);姚伯初;萬(wàn)玲;陳慧;康波;;南海南北大陸邊緣盆地構(gòu)造演化差異性對(duì)油氣成藏條件控制[J];地球物理學(xué)報(bào);2011年12期

8 劉和甫,夏義平,殷進(jìn)垠,尚培樂(lè);走滑造山帶與盆地耦合機(jī)制[J];地學(xué)前緣;1999年03期

9 崔盛芹;論全球性中-新生代陸內(nèi)造山作用與造山帶[J];地學(xué)前緣;1999年04期

10 姚伯初;南海海盆新生代的構(gòu)造演化史[J];海洋地質(zhì)與第四紀(jì)地質(zhì);1996年02期

相關(guān)碩士學(xué)位論文 前1條

1 吳敬武;瓊東南盆地南部凹陷構(gòu)造特征及形成機(jī)制[D];浙江大學(xué);2008年

，

本文編號(hào)：1897264