汤原断陷古近系成藏史模拟

发布时间：2018-07-12 08:38

本文选题：汤原断陷 + 成藏史　；参考：《东北石油大学》2017年硕士论文

【摘要】：为了研究汤原断陷古近系的油气聚集规律,恢复本区的成藏动力学过程,本文在综合利用研究区区域地质资料、钻井、测井、地震和分析化验等资料,分析并总结了成藏基本地质条件,应用盆地模拟技术,对汤原断陷古近系地层进行了成藏史模拟并分析了成藏动力学过程。成藏基本条件分析表明,汤原断陷古近系烃源岩整体上属于中-好烃源岩,有机质类型主要为IIB-III型,主力烃源岩处于低成熟-成熟阶段,已进入了生、排烃门限。砂岩储层分布广泛,其物性以中孔中渗为主。盖层封闭条件较好,并发育有多套生储盖组合。圈闭以构造圈闭为主,而且保存条件良好,具备成藏基本条件。成藏史模拟结果表明,自新生代开始,进入断陷期,基底开始快速沉降,沉降速率逐渐增大,宝泉岭组沉积时期达到最大,185.3m/Ma;宝二段沉积末期,盆地发生构造反转,地层抬升剥蚀;新近纪以来,盆地进入断陷消亡期,盆地沉降幅度很小,总沉降速率仅为14.1m/Ma。汤原断陷的构造具有长期继承性发育的特征,主要圈闭构造在达连河组沉积末期已具雏形,在新近纪初期基本定型。主力烃源岩在宝泉岭组沉积时期进入生烃门限,宝二段沉积末期进入成熟阶段,开始大量生烃;在宝泉岭组沉积早-中期开始排烃。汤原断陷具有两期成藏的特点,第一期成藏期为宝泉岭组沉积时期,第二期为新近系富锦组沉积时期。汤原断陷圈闭的形成时期早于油气运移时期,二者匹配良好。
[Abstract]:In order to study the oil and gas accumulation law of Paleogene in Tangyuan fault depression and to restore the dynamic process of reservoir formation in this area, this paper makes comprehensive use of regional geological data, drilling, logging, seismic and analytical laboratory data in the study area. The basic geological conditions of reservoir formation are analyzed and summarized. The reservoir forming history of Paleogene strata in Tangyuan fault depression is simulated and the dynamic process of reservoir formation is analyzed by using basin simulation technology. The analysis of the basic conditions of reservoir formation shows that the source rocks of Paleogene in Tangyuan fault depression belong to meso-good source rocks as a whole, the organic matter type is mainly IIB-III type, and the main source rocks are in low maturation and mature stage, and have entered the threshold of hydrocarbon generation and expulsion. Sandstone reservoirs are widely distributed and their physical properties are mainly mesoporous and permeable. Caprock sealing conditions are good, and there are many sets of reservoirs and caprock assemblage. The traps are mainly structural traps with good preservation conditions and basic conditions for reservoir formation. The simulation results of reservoir forming history show that since the Cenozoic period, the basement began to subsidence rapidly, and the sedimentation rate gradually increased, and the maximum sedimentation time of Baoquanling formation reached 185.3 m / Ma.The tectonic inversion occurred in the basin at the end of Baoguanling formation. Since Neogene, the basin has entered the stage of faulting and wiping out, and the subsidence range of the basin is very small, and the total subsidence rate is only 14.1 m / Ma. The structure of Tangyuan fault depression has the characteristics of long-term inheritance and development. The main trap structure has been formed in the late sedimentary stage of Dalianhe formation and has been basically shaped in the early Neogene. The main source rocks entered the threshold of hydrocarbon generation in the sedimentary period of Baoquanling formation, the late stage of the Baoshan formation entered the mature stage and began to generate a large amount of hydrocarbon, and the expulsion of hydrocarbon began in the early to middle period of the Baoquanling formation. The Tangyuan fault depression is characterized by two stages of reservoir formation, the first is the sedimentary period of Baoquanling formation and the second is the sedimentary period of Fujin formation of Neogene. The formation period of Tangyuan fault trap was earlier than that of oil and gas migration, and the two matched well.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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