【作者】 郝雪峰；

【导师】 陈汉林；

【作者基本信息】 浙江大学 ， 地质学， 2007， 博士

【摘要】 当前随着东部断陷盆地勘探程度的提高，勘探中要求对圈闭有效性作出判别，成藏理论预测要素由源岩、圈闭向运移发展。虽然油气运移的动力、方式等因素作为预测要素可操作性较差，但运移的静态地质表现形式——输导体系具有较强的可操作性。对比而言，“源控论”立足于源岩，从成烃角度解决盆地油藏预测的有无问题；复式油气聚集理论主要从圈闭出发，在聚集角度解决盆地油藏预测的分布问题；而从输导体系出发，则是在运聚角度解决盆地油藏预测的精度问题。本文指出，输导体系是源岩与圈闭联系的物质体现，是圈闭有效性衡量的重要标准。陆相断陷盆地中输导体系表现为断层、裂隙、骨架砂体、不整合等地质要素及其各类组合样式。理论研究和生产实践证明存在油气运移主干道，与断层的活动与运移机理对应，输导体系也存在时间上的有限性，即输导体系存在空间上的有效性及有限性；输导体系与油气运聚相辅相成，输导体系不同则油气运移的方式不同，效率不同，对油藏分布的控制作用不同。本文以东营凹陷为例，在盆地输导体系要素分析及其地质控制因素研究基础上，建立盆地范围的输导体系格架，指出不同构造部位发育不同类型的输导体系样式，在油藏分布的纵向层位、平面位置、运移方向上的演化等方面分析输导体系与油藏类型、分布、数量的关系，指出输导体系类型及空间分布、变化特征控制了东营凹陷油藏类型、分布特征及变化规律。在单因素控藏分析基础上，本文提出了输导体系控藏模式，从输导体系要素及其组合空间样式对东营凹陷油藏分布规律作出解释：平面相邻的油藏类型纵向叠置分布。这种如同Walther沉积相律的分布特点，建立于陆相断陷盆地输导体系类型在横向、纵向上的连续和相似的变化，更深刻的反映了断陷盆地的构造——沉积——成藏规律。在概念分析基础上，结合陆相断陷盆地的地质特点，阐明输导体系空间组合样式的两种典型表现形式——缓坡带“阶梯”型和陡坡带“T—S”型样式。指出具有典型意义的输导体系控藏模式，并不仅仅是输导体系的空间组合样式，还表现了输导体系样式对成藏具有特殊的控制作用，更深入反映了陆相断陷盆地油气的运移聚集规律。更多还原

【Abstract】 According to the exploration practice and the theory searching of the Mesozoic-Cenozoic petroleum basin in East China, Chinese geologists proposition Source control theory and Multiple oil-gas accumulation zone based in Songliao and Bohai Bay basin. Source control theory points out source rock sag control the oil fields distributing. Multiple oil-gas accumulation zone points out the pools controlled by sub-structure belt in basin. Multiple oil-gas accumulation zone forming multi-type reservoir assemblages, trap styles and the assemblage style control reservoir. Along with the prospect mature degree increased in East rift basin, the effective of the trap has to be distinguished. Migration searching grow to the main forecast element. Contrast to the dynamic manner and the mode of migration, the static state form of migration - conduit systems, have preferably operable characteristics. Source control theory depends on the source rock sags, figure out the presence or no of oil in basin from hydrocarbon generated. Multiple oil-gas accumulation zones depend on the trap assemblages, forecast the pool distributing in basin from accumulation. Based on the conduit system, the forecast precision of the pool could be figure out and improved in petroleum basin.Conduit system is the physical presence form of the relation between the source rock and the traps, also the signify criterion of the trap’s effectiveness. The conduit system is consisted of faults, fracture, framework sands, unconformity beds and their compositions. The main pathway of hydrocarbon migration has been proved by theory searching and exploration practice. The conduit system has the limited action in time and space controlled by the faults active mechanisms. The effective conduit system is the action conduit system in effective time and space. The model and the efficiency of hydrocarbon migration is controlled by the effective conduit system styles. The distributing of the pools is controlled by the conduit system also.This paper based on the elements analysis and the study of the controlled factors in Dongying depression, joint with the mechanisms analysis of faults, fracture, frame sands and the unconformity beds, illustrate the static style and the dynamic evolvement of the conduit systems in rift basin. It points out that the conduit systems controlled the styles and distributing of reservoirs in the way of static, dynamic and ration in basin. The distributing rule of the pools in the way of section, plane and migration direction in basin, associated with the single factor and multi-factor composite analysis, point out the conclusion of the Conduit system control reservoirs. This paper points out the conduit systems and their distributing rules control the classification, stratification and distributing of reservoirs in the manners of section and plane. Based on all this, two typical composite styles of conduit systems-Ladder model and "T-S" model has been illustrated in continental rift basin. This paper points out that the typical model of conduit systems control reservoirs is not only the composite styles of the conduit system but also the peculiar reflection of the conduit system controlled function. In a word, Conduit system control reservoirs uncover the essence rule of the hydrocarbon migration and accumulation in continental rift basin.更多还原