本文選題：成藏機(jī)制與模式　切入點(diǎn)：遠(yuǎn)源巖性油氣藏　出處：《山東科技大學(xué)》2017年碩士論文

【摘要】：遠(yuǎn)源巖性油氣藏為油氣生成環(huán)境與成藏環(huán)境的溫壓等條件差異明顯的巖性油氣藏。準(zhǔn)噶爾盆地沉積地層具有多溫壓系統(tǒng)的特點(diǎn),為遠(yuǎn)源巖性油氣藏的形成提供了基礎(chǔ)條件。本論文從成藏靜態(tài)要素分析入手,以輸導(dǎo)體系為主線,成藏機(jī)理和動(dòng)力學(xué)過(guò)程為核心,采用盆地模擬方法,恢復(fù)成藏期溫壓場(chǎng)特征、油氣輸導(dǎo)格架及流體驅(qū)動(dòng)機(jī)制,揭示盆地遠(yuǎn)源巖性油氣藏形成的油氣運(yùn)聚過(guò)程,闡明其成藏機(jī)制與成藏模式。準(zhǔn)噶爾盆地油氣主要來(lái)源于二疊系和侏羅系烴源巖,盆地內(nèi)發(fā)育C-T2儲(chǔ)層與T3區(qū)域蓋層、Jib儲(chǔ)層與J1s蓋層、J2-J3儲(chǔ)層與K1區(qū)域蓋層、K2-E2儲(chǔ)層與E3蓋層、N1儲(chǔ)層與N2蓋層等5套儲(chǔ)蓋組合。巖性圈閉的形成受古地貌、物源及沉積體系空間匹配關(guān)系的控制,多分布于盆地東、西隆起區(qū)向中央坳陷過(guò)渡的陡坡區(qū)以及盆地內(nèi)部凸起向凹陷過(guò)渡的緩坡區(qū),與烴源巖相隔較遠(yuǎn),且垂向上由多套區(qū)域蓋層相隔,成藏條件復(fù)雜。遠(yuǎn)源巖性油氣藏形成的輸導(dǎo)體系主要由多旋回構(gòu)造運(yùn)動(dòng)形成的不整合與垂向斷裂及多期疊置發(fā)育的大型三角洲砂體組成。盆地內(nèi)各構(gòu)造單元油氣遠(yuǎn)源運(yùn)聚的輸導(dǎo)格架多發(fā)育于晚海西期構(gòu)造運(yùn)動(dòng),定型于燕山期構(gòu)造運(yùn)動(dòng);除西部隆起、莫北-莫索灣地區(qū)輸導(dǎo)體系受車(chē)-莫古隆起的發(fā)育與演化改造外,其他構(gòu)造單元輸導(dǎo)體系形態(tài)自形成后基本保持不變。輸導(dǎo)體系有效性及輸導(dǎo)機(jī)制研究表明準(zhǔn)噶爾盆地燕山期與喜馬拉雅期構(gòu)造運(yùn)動(dòng)及古構(gòu)造形態(tài)對(duì)油氣遠(yuǎn)源聚集具有明顯的控制作用。準(zhǔn)噶爾盆地在垂向上發(fā)育P-T3、J1-J1s和K1tg-E2-3a三套相對(duì)封閉的地層溫壓系統(tǒng),分別形成于晚三疊世、中侏羅世和始新世,垂向上將盆地分為C-T3、J1-J1s、J2-K1、K2-E3及E3-N等5個(gè)成藏系統(tǒng)。燕山期斷裂活動(dòng)強(qiáng)烈、地層溫壓能量調(diào)整、超壓流體釋放,一方面為遠(yuǎn)源巖性油氣藏的形成提供物質(zhì)基礎(chǔ),另一方面則對(duì)油氣運(yùn)聚提供輸導(dǎo)動(dòng)力。喜山期,盆地主要為南降北升的掀斜運(yùn)動(dòng),斷裂活動(dòng)微弱,油氣保存條件良好。準(zhǔn)噶爾盆地遠(yuǎn)源巖性油氣藏多形成于燕山構(gòu)造運(yùn)動(dòng)時(shí)期,其形成與分布受控于古構(gòu)造形態(tài)、盆地溫壓場(chǎng)的形成與演化及斷裂垂向輸導(dǎo)空間的有效性。依據(jù)油氣遠(yuǎn)源聚集的動(dòng)力學(xué)過(guò)程,認(rèn)為斷壓控制油氣越層運(yùn)移充注是該區(qū)遠(yuǎn)源巖性油氣藏的主要成藏機(jī)制。根據(jù)油氣成藏輸導(dǎo)動(dòng)力及輸導(dǎo)體系的組合類(lèi)型與作用特點(diǎn),提出高能驅(qū)動(dòng)-油氣越層多階式成藏、低能驅(qū)動(dòng)-油氣越層多階式成藏、低能驅(qū)動(dòng)-油氣越層單階式成藏及高能驅(qū)動(dòng)-油氣越層單階式成藏等4種遠(yuǎn)源巖性圈閉成藏模式。
[Abstract]:The remote lithologic reservoirs are lithologic reservoirs with obvious differences in temperature and pressure between hydrocarbon generation environment and reservoir forming environment. The sedimentary strata in Junggar Basin are characterized by multi-temperature pressure system. This paper begins with the analysis of the static elements of the reservoir formation, taking the transportation system as the main line, the reservoir forming mechanism and the dynamic process as the core, and adopts the basin simulation method to restore the characteristics of the temperature and pressure field during the reservoir forming period. Oil and gas transport framework and fluid driving mechanism reveal the process of hydrocarbon migration and accumulation of remote source lithologic reservoirs in the basin, and illustrate the mechanism and model of hydrocarbon accumulation. The oil and gas of Junggar Basin are mainly derived from Permian and Jurassic source rocks, and the oil and gas of Junggar Basin are mainly derived from Permian and Jurassic source rocks. There are five sets of reservoir and cap assemblage developed in the basin, such as C-T2 reservoir and T _ 3 area caprock reservoir, J1s caprock reservoir, J _ 2-J _ 3 reservoir and K _ 1-E _ 2 reservoir and E _ 3 caprock reservoir and N _ 2 caprock. The formation of lithologic traps is caused by paleogeomorphology. The spatial matching relationship between provenance and sedimentary system is controlled by the steep slope from the east and west uplift of the basin to the central depression and the gentle slope from the protruding to the sag in the basin, which is far away from the source rock. And vertically separated by multiple sets of regional caprocks, The reservoir forming conditions are complex. The transport system formed by the remote lithologic reservoirs is mainly composed of the unconformity and vertical faults formed by the polycyclic tectonic movement and the large delta sand bodies developed in multiple periods. The oil and gas of each structural unit in the basin is composed of oil and gas. The transport framework of distant migration and accumulation mostly developed in late Hercynian tectonic movement. Shaped in Yanshanian tectonic movement, except for the western uplift, the transport system in Mobei-Moso Bay area was transformed by the development and evolution of Che-Mogu uplift, The study on the validity and mechanism of the transport system indicates that the Yanshanian and Himalayan tectonic movements and paleotectonics in Junggar Basin have great influence on the accumulation of oil and gas. In Junggar basin, three sets of relatively closed formation temperature and pressure systems, P-T _ 3N _ J _ 1-J _ 1s and K1tg-E2-3a, have been developed in the vertical direction. Formed in the late Triassic, Middle Jurassic and Eocene, the basin was vertically divided into five pool-forming systems, C-T _ 3N J _ 1-J _ 1s _ (1) J _ 2-K _ (1) K _ (2-E _ 3) and E _ 3-N. The Yanshanian fault was strongly active, the formation temperature and pressure energy was adjusted, and the overpressure fluid was released. On the one hand, it provides material basis for the formation of remote lithologic reservoirs, on the other hand, it provides transportation power for oil and gas migration and accumulation. In the Himalayan period, the basin was mainly a tilting movement from the south to the north, and the fault activity was weak. The formation and distribution of oil and gas reservoirs in Junggar Basin were controlled by paleotectonics, and most of them were formed during the Yanshanian tectonic movement. The formation and evolution of the temperature and pressure field in the basin and the validity of the vertical fault transport space. It is considered that fault-pressure control is the main reservoir forming mechanism of remote lithologic reservoirs in this area. According to the combination types and characteristics of hydrocarbon reservoir formation and transportation power and transportation system, the high-energy driving-oil-gas overpass multi-stage reservoir formation is proposed. There are four kinds of remote lithologic trap formation models, such as low energy drive, low energy drive, single stage oil and gas migration and high energy drive.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：P618.13

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳建平;王緒龍;鄧春萍;梁狄剛;張?jiān)竭w;趙U，

本文編號(hào)：1666399