【作者】 杨春；

【导师】 王宇林；

【作者基本信息】 辽宁工程技术大学 ， 矿产普查与勘探， 2005， 硕士

【摘要】 本文根据沉积学和地球化学原理,对建昌—喀左盆地烃源岩系进行了比较深入的研究。揭示出该区北票组烃源岩为弱氧化—弱还原条件下的淡水湖沼相沉积,沉积时水体较浅; 九佛堂组烃源岩为弱还原—还原条件下的淡水—微咸水湖相沉积,沉积时水体较深。同时,北票组发育河流沉积体系和湖泊沉积体系; 九佛堂组发育河流沉积体系、辫状河三角洲沉积体系和湖泊沉积体系。阐明了北票组烃源岩有机质丰度高,以腐殖型和腐泥腐殖型为主,处于未成熟阶段; 九佛堂组烃源岩丰度较低,以腐泥腐殖型和腐殖腐泥型为主,处于低成熟—成熟阶段。进而论述了盆地的构造演化控制了沉积相带的发育程度与分布,沉积环境控制了烃源岩原始有机物质沉积时的生物类型及丰度。最后指出在研究区内,四官营子凹陷和建昌凹陷生烃条件较好,是今后寻找油气的有利地区。更多还原

【Abstract】 Based on sedimentological and geochemical theories, this paper have studied and discussed more profoundly about the source rock measures of Jianchang-Kazuo basin. It had been discovered that source rocks of Beipiao formation are freshwater lacustrine and swamp facies deposits that formed in the weak reduction to reduction environment with shallow water table; source rocks of Jiufotang formation are freshwater to weak saltwater lacustrine facies deposits that formed in weak reduction to weak oxidative environments with more deeper water table. Meanwhile, the Beipiao formation is composed of fluvial system and lacustrine system and the Jiufotang formation is made up of fluvial system, braided river deltaic system and lacustrine system. Clearly formulated that source rocks of Beipiao formation are humic and sapropelic-humic type with high organic matter abundance that at immature stage; that of Jiufotang formation are sapropelic-humic and humic-sapropelic type with less high organic matter abundance that at less mature-mature stage. Then put forward an opinion that the structural evolution of the basin controls the development and distribution of facies belt of the sediment, and depositional environments determined life-forms and it’s enrichment of source rocks while the original organic matters deposited. At last pointed out Siguanyingzi and Jianchang sub-depression are in better hydrocarbon generating conditions In the research area, and are profitable districts for searching oil and gas in the future.更多还原