本文選題：彰武盆地 + 早白堊世��； 參考：《吉林大學(xué)》2016年博士論文

【摘要】：松南早白堊世斷陷盆地群是潛力較大的勘探新區(qū),彰武盆地作為其中的典型代表,滾動開發(fā)已經(jīng)展開。鉆井與試油結(jié)果表明,彰武盆地滿盆含油,但只有X2和X8兩個(gè)井區(qū)達(dá)到工業(yè)油流標(biāo)準(zhǔn),并穩(wěn)定投產(chǎn),而在盆地其他部位,僅見油氣顯示,但并未發(fā)現(xiàn)成規(guī)模的油氣藏。彰武盆地油氣產(chǎn)區(qū)位于盆地X2-X8一線NNW走向的斜向低隆之上。研究盆內(nèi)低隆如何產(chǎn)生,盆內(nèi)沉積體系如何展布,以及盆地如何演化成為研究彰武盆地亟待解決的重要問題之一。解決這些問題,不僅可為盆地內(nèi)進(jìn)一步勘探開發(fā)提供參考,對其周緣斷陷盆地的勘探開發(fā)同樣具有借鑒價(jià)值。本文以整個(gè)彰武盆地為研究區(qū),以下白堊統(tǒng)九佛堂組、沙海組為目的層,開展沉積體系與構(gòu)造控制研究。根據(jù)地震剖面的地質(zhì)解釋確定盆地?cái)嗔押偷貙影l(fā)育狀況,研究盆地構(gòu)造樣式,并運(yùn)用平衡剖面原理,繪制盆地構(gòu)造發(fā)育史剖面,恢復(fù)盆地充填過程和構(gòu)造演化,同時(shí)對盆地發(fā)育機(jī)制進(jìn)行探討�；跍y井曲線、錄井巖性、巖心等資料通過標(biāo)準(zhǔn)層控制下的旋回對比和分級控制的方法進(jìn)行全盆砂組劃分對比,建立層序地層格架,總結(jié)層序發(fā)育模式。確定沉積體系的平面展布,建立沉積相模式。從地層發(fā)育、沉積體系、成藏作用三個(gè)方面研究構(gòu)造-火山作用對于盆地的控制作用。一、盆地構(gòu)造特征和演化彰武盆地整體為東斷西超的箕狀盆地,東部為陡坡,西部為緩坡。斷裂F1為控盆斷裂,為犁式正斷層,頂部較陡向下變緩。斷裂F2、F3在伸展同時(shí),伴隨扭動作用,屬調(diào)節(jié)斷層。九佛堂組和沙海組時(shí)期,盆地經(jīng)歷了伸展階段和扭轉(zhuǎn)階段兩個(gè)階段。伸展階段包括拉張伸展期(相當(dāng)于九佛堂組下段沉積期)、轉(zhuǎn)換伸展期(相當(dāng)于九佛堂組上段沉積期)、構(gòu)造反轉(zhuǎn)期(九佛堂組沉積期末)。扭轉(zhuǎn)階段包括轉(zhuǎn)換伸展期(相當(dāng)于沙海組下段沉積期)、萎縮反轉(zhuǎn)期(相當(dāng)于沙海組上段沉積期)。盆內(nèi)最重要的低凸起即X2-X8凸起是由于盆地右旋扭動產(chǎn)生的擠壓應(yīng)力場造成的,這一凸起帶是整個(gè)盆地的油氣有利區(qū)。二、層序地層格架確定地層發(fā)育完整的井作為標(biāo)準(zhǔn)井。依據(jù)測井標(biāo)準(zhǔn)曲線和綜合錄井,對標(biāo)準(zhǔn)井含油層系進(jìn)行砂組劃分。在標(biāo)準(zhǔn)井砂組劃分后,優(yōu)選標(biāo)準(zhǔn)層段,建立典型剖面,開展標(biāo)準(zhǔn)井統(tǒng)層。建立過標(biāo)準(zhǔn)井的骨干剖面網(wǎng),從標(biāo)準(zhǔn)井出發(fā),采取鄰井對比,井點(diǎn)輻射,逐步蔓延,統(tǒng)一閉合,劃分全區(qū)的地層。識別層序界面,建立了層序地層格架,九佛堂組和沙海組共劃分了13個(gè)三級層序,4個(gè)二級層序。4個(gè)二級層序(超層序)相當(dāng)于九佛堂組下段、九佛堂組上段、沙海組下段和沙海組上段。13個(gè)三級層序分別相當(dāng)于九7-九1砂組的7個(gè)層序,沙5、沙4-沙3、沙2的3個(gè)層序,沙1-1、沙1-2、沙1-3的3個(gè)層序。據(jù)此建立盆地層序模式共5種8型。包括受正拉張伸展構(gòu)造控制的“粗-細(xì)-粗對稱”和受斜張走滑控制的“細(xì)-粗-細(xì)偏對稱”的陡坡型;受正拉張伸展構(gòu)造控制的“粗-細(xì)非對稱”和受斜張走滑控制的“細(xì)-粗-細(xì)對稱”的緩坡型;受正或斜拉張構(gòu)造控制的“細(xì)夾粗”的深水型;受正拉張伸展構(gòu)造控制的“細(xì)-粗-細(xì)”的深槽型;受斜張走滑構(gòu)造控制的“細(xì)-粗-細(xì)”的臺灘型。三、物源-沉積體系識別出彰武盆地的巖石類型,四類、十五亞類、二十次亞類和47類基本類型。4大類包括陸源碎屑巖大類、火山熔巖大類、火山碎屑巖大類和侵入巖(脈巖)大類。十五亞類包括礫巖、砂巖、灰?guī)r等,二十次亞類包括安山玄武巖、玄武巖等,47類基本類型包括復(fù)成分礫巖、砂礫巖等。識別出彰武盆地的沉積相(相、亞相和微相)類型,四相、十亞相、二十微相。四相分別是湖泊相、扇三角洲相、三角洲相和火山巖相,十亞相包括淺湖、半深湖、水下扇等,二十微相包括濁流、靜水泥、水下河道等。沉積體系包括東部沉積體系、西部沉積體系、西南沉積體系、東北沉積體系等。其中,主要沉積體系為東部沉積體系和西部沉積體系。東部為火山物源-扇三角洲物源-沉積體系,西部為火山-風(fēng)化物源-辮狀河三角洲沉積體系。四、構(gòu)造控制伸展扭動構(gòu)造機(jī)制下的構(gòu)造沉降導(dǎo)致相對湖平面變化,并由此控制層序發(fā)育,特別表現(xiàn)在水進(jìn)期盆地中部有大規(guī)模沉積物進(jìn)積。隨構(gòu)造活動伴生的火山作用既提供了大量的沉積物,并使得盆地東部物源和西部物源產(chǎn)生差異。同期發(fā)育的同生凸起和兩側(cè)深凹陷提供了深湖的油頁巖和沼澤的煤層兩種烴源巖。構(gòu)造作用產(chǎn)生的X2—X8低凸起與兩側(cè)生油凹陷一起,構(gòu)成了近源組合,利于油氣藏的形成,使得X2—X8一帶成為成藏有利區(qū)。
[Abstract]:The early Cretaceous fault basin group in southern Songliao basin is a new exploration area with great potential. As a typical representative of the Zhangwu basin, the rolling development has been carried out. The results of drilling and oil test show that the Zhangwu basin is filled with oil, but only the two wells in the X2 and X8 wells reach the standard of industrial oil flow, and the oil and gas show only in other parts of the basin, but in other parts of the basin, only oil and gas display, but the other parts of the basin are shown only by oil and gas display, but the other parts of the basin are shown only by oil and gas display. The oil and gas reservoirs in Zhangwu basin are not found. The oil and gas producing areas in the Zhangwu basin are located above the oblique low uplift of the NNW direction of the front line of the basin. It is one of the important problems to study how the low uplift of the basin is produced, how the sedimentary system is distributed in the basin and how the basin evolves to be one of the important problems to be solved in the Zhangwu basin. One step of exploration and development provides reference and is of reference value for the exploration and development of its circumference faulted basin. This paper takes the whole Zhangwu basin as the study area, the following nine Buddha Hall formation in the Cretaceous and the Sha Hai formation as the purpose layer, to carry out the study of the sedimentary system and structure control. The structural style of the basin is studied, and the balance section principle is used to draw the tectonic development history section of the basin, to restore the filling process and structural evolution of the basin, and to discuss the mechanism of the basin development. Based on the logging curve, logging lithology, core and other data, the whole basin sand group is carried out through the method of cycle contrast and classification control under the control of standard layer. It establishes the sequence stratigraphic framework, summarizes the sequence development pattern, determines the plane distribution of the depositional system and establishes the sedimentary facies model, and studies the control effect of the tectonic volcanism on the basin from three aspects of formation development, depositional system and reservoir formation. One, the basin tectonic characteristics and evolution of Zhangwu Basin are the skip like basins of the East fault West. In the East, the East is a steep slope and the west is a gentle slope. The fault F1 is a control Basin fault, it is a plow type fault, and the top is steeply downward. The fracture is F2, F3 is extended at the same time, and is associated with the adjustment fault. The basin experienced two stages of stretching and twisting stages during the period of nine and Sha Hai formation. The extension stage includes the extension period (equivalent to nine). The transformation extension period (equivalent to the upper part of the nine fo Tang formation) and the tectonic inversion period (the end of the nine Buddhist temple sedimentary period). The reverse phase includes the transition extension period (equivalent to the lower section of the Sha Hai formation) and the atrophy reversal period (equivalent to the upper part of the Sha Hai Group). The most important low uplift in the basin is the X2-X8 uplift. The extrusion stress field produced by dextral twisting is caused by the stress field of the whole basin. Two, the sequence stratigraphic framework determines the well developed well as the standard well. According to the standard logging curve and comprehensive logging, the sand group in the standard well is divided. After the standard well sand group is divided, the standard level section is selected and established. Typical profile, standard well formation, established standard well backbone section network, starting from standard wells, adopting adjacent well contrast, well point radiation, gradual spread, unified closure, division of whole area formation, identification of sequence interface, sequence stratigraphic framework, nine fo Tang formation and Sha Hai formation, 13 three order sequences and 4 grade two sequence.4 two levels The sequence (super sequence) is equivalent to the lower part of the nine fo Tang formation, the upper part of the nine fo Tang formation, the lower section of the Sha Hai formation and the upper part of the Sha Hai formation.13 three sequence is equivalent to 7 sequence of nine 7- nine 1 sand groups, sand 5, sand 4- sand 3, 3 sequence of sand 2, Sha 1-1, Sha 1-2 and Sha 1-3. The "coarse fine coarse symmetry" controlled by the "coarse fine skew symmetrical" slope controlled by oblique stretching; "coarse finely asymmetric" controlled by a positive stretching extension and a "fine coarse fine symmetrical" gentle slope controlled by oblique stretching; a "fine coarse" deepwater type controlled by a positive or oblique tension structure; subjected to a positive tension extensional structure. The "fine coarse fine" deep groove type, controlled by the slanting and sliding structure, is controlled by the slant and sliding structure. Three, the source sedimentary system identifies the rock types of the Zhangwu basin, the four, the fifteen subcategories, the twenty subclasses and the 47 basic types, including the terrestrial clastic rock, the volcanic lava large category, the major category and invade of the pyroclastic rock. The fifteen subclasses include conglomerate, sandstone, limestone and so on. The twenty subclasses include Anshan Xuan Wuyan, Xuan Wuyan and so on. The 47 types of basic types include complex conglomerate and gravel. The sedimentary facies (facies, subfacies and microfacies) of the Zhangwu basin, four facies, ten subfacies and twenty microfacies are identified as lacustrine facies and fan delta facies, respectively. The delta facies and volcanic facies, the ten subfacies include shallow lakes, semi deep lakes, subaqueous fans, and the twenty microfacies include turbidity, static cement and underwater channel. The sedimentary system includes the eastern sedimentary system, the Western sedimentary system, the southwest sedimentary system and the Northeast sedimentary system, among which the main sedimentary system is the eastern sedimentary system and the Western sedimentary system. The East is the East. The volcanic source fan delta source sedimentary system, the western part of the volcano weathered source - braided river delta sedimentary system. Four, the tectonic subsidence caused by tectonic control extension and torsion structure resulted in relative lake level change, and thus controlled the sequence development, especially in the middle of the basin. The associated volcanism not only provides a large number of sediments, but also causes differences in the eastern and Western sources of the basin. The simultaneous uplift and deep sag developed in the same period provide two source rocks of the deep lake oil shale and the swamp coal beds. The X2 - X8 low uplift produced by the tectonic action is associated with the two sides of the oil sags, forming a near source assemblage. It is favorable for the formation of oil and gas reservoirs, making the X2 X8 area a favorable area for hydrocarbon accumulation.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：P618.13

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