【作者】 张永丰；

【导师】 蒋有录；

【作者基本信息】 中国石油大学 ， 矿产普查与勘探， 2009， 硕士

【摘要】 本文采用油气地质综合研究方法,对霸县凹陷的新近系油气藏的地质特征、烃源岩地化特征及油源对比、输导体系及油气运移方向、成藏模式及主控因素等进行了综合研究。研究表明,霸县凹陷发育有沙一下亚段、沙三段和沙四段三套有效烃源岩;烃源岩生烃史模拟表明,沙一段烃源岩在东营末进入低熟油阶段,文安斜坡带不具备生烃能力,新近系油气藏分布在有效生烃范围之外,属于他源异地成藏。霸县凹陷新近系油藏主要分布在文安斜坡外带的馆陶组地层中,油藏类型为受断层控制的断鼻或断块油藏。油源对比结果表明,新近系油气的各项地化指标与沙一下亚段烃源岩地化特征相同。研究区油气输导体系格架主要由古近系渗透性砂体、断层和不整合组成。通过原油物性、含氮化合物、流体性质、油气显示特征及有效通道空间等方法的研究,对霸县凹陷文安斜坡带有效输导体系进行了综合判识,认为油气来自霸县洼槽沙一下烃源岩,沿砂体、断层和不整合组成的阶梯状运移通道运移,随运移距离的不断增加,运移层位逐渐变新,最终在文安斜坡带的新近系地层中成藏。据此,建立了斜坡区新近系油藏的阶梯状侧向运移成藏模式,认为新近系油气藏形成及分布的主控因素为:构造特征控制新近系油藏的分布,有效输导体系决定了油气的运移方向,保存条件决定了新近系油藏的规模。更多还原

【Abstract】 With the comprehensive research methods of petroleum geology, this paper gives a comprehensive research on the Forming Mechanism and Models of Neocene Reservoirs in Wenan slope, Baxian Depression. Through the research on the geologic reservoir characteristic, geochemical characteristics of source rock and oil-source correlation, passage system and migration direction, accumulation models and main controlling factors, has obtained the following results and recognitions:The results show that lower Es1, Es3 and Es4 are effective source rocks;the hydrocarbon generation of source rocks are simulated, and it is concluded that Es1 source rock generate low mature oil in the late of Ed epocd, Wenan slope zone does not have hydrocarbon generation capacity and it’s Neocene hydrocarbon belonging to other sources. Neocene hydrocarbon distributes in Ng formation of outer belt, Wenan slope zone which mostly is fault nose reservoirs or fault-block reservoirs. The oil-source correlation indicates Neogene hydrocarbon froming lower Es1 source rock.The pathway system is consisted of three parts in the study area:permeable sand bodies, faults and unconformities. Effective passage system is identified through researching crude oil properties,nitrogen compounds,fluid properties, hydrocarbon show and effective migration space. Hydrocarbon migration in the manner of ladder stairs which layer becoming new gradually with the rising of migration distance, finally, accumulate in Neogene formation of Wenan slope. Based on this, one pool-forming model is established: tepladder-lateral migration model. At last, it is concluded that the main controlling factors of Neogene oil pool-forming in Baxian Sag are the regional tectonic background,the effective pathways and the preservation conditions.更多还原