【作者】 庞凌云；

【导师】 王明镇； 常象春；

【作者基本信息】 山东科技大学 ， 古生物学与地层学， 2008， 硕士

【摘要】 随着勘探程度的不断加深,剩余油气资源的隐蔽性越来越强,岩性油气藏在勘探领域中显现出越来越重要的地位和作用。临南洼陷作为惠民凹陷最重要的洼陷,经历四十余年的构造油气藏勘探后,寻找岩性油气藏成为下一步勘探的重点。近几年的勘探实践表明,岩性圈闭的含油性变化较大,其含油性和充满度大小的估算已成为油田勘探决策、井位部署及油田开发过程中不可缺少的重要技术。目前急需一种合理而可靠的评价方法来准确地预测砂体的含油性,从而提高油气勘探效益、满足岩性油藏勘探实践的要求。本论文围绕建立岩性油气藏含油性预测模型,并对临南洼陷有利勘探区进行预测这一目的,首先从研究区选取砂岩透镜体、砂体上倾尖灭和构造-岩性三种典型岩性油气藏,从砂体层位、埋深、构造部位、沉积体系、储层物性、圈闭充满度和含油饱和度等方面对其成藏条件进行解剖,结果表明,三个区块的砂体都类型都有利于岩性油气藏的形成,但是含油性存在差异。其次,从临南洼陷选取14个岩性油气藏砂体进行统计分析,内容包括:砂体基本特征、砂体构造特征、沉积特征、储集特征及含油气特征等,结合典型油气藏的解剖认为临南洼陷岩性油气藏成藏的主要控制因素有构造特征,沉积相、烃源岩生排烃强度以及储集条件。在统计分析的基础上,运用层次分析法对影响临南洼陷岩性油气藏含油性的各种因素进行分析,确定了各影响因素的权重:临南洼陷储集子系统与生排烃子系统对岩性油藏含油饱和度起着决定性作用,其影响权值分别达到了0.57和0.28,其中埋深与含油饱和度有密切关系;储集及运聚子系统对本区岩性油藏的充满度起着较为明显的作用,权值分别达到0.5和0.26。在此基础上建立了含油性定量预测模型所需参数,并利用逐步回归、剔除变量的数学地质方法,建立了预测临南洼陷岩性油藏含油性的模型。根据这一模型,结合成藏主控因素,预测基山三角洲岩性油藏有利目标5个,指出江家店—瓦屋三角洲是砂体透镜体油气藏发育的有利区带,营子街地区则有利与构造—岩性油气藏的形成。更多还原

【Abstract】 With the development of oil exploration, the concealments of residual petroleum resources are more prominent and lithological reservoirs have attracted much more attention in exploration field. After more than 40 years exploration on tectonic reservoirs, lithological reservoirs have become the next key targets in Linnan subsag, the most important subsag in Huimin sag. Exploration in the last few years indicates that the oil-bearing properties of lithological trap varies a lot, and to calculate the oil-bearing and oil-filling index has been an indispensable technique in making decision on oil fields exploration, locating wells, and developing oil pools. Now a reasonable and credible evaluation is badly needed to forecast the petroliferous properties accurately, which can improve the efficiency of oil exploration and meet the needs of lithological reservoir exploration.Based on the aim of establishing a model about the petroliferous properties in reservoirs and predicting favorable areas in Linnan subsag, this article selects three kinds of typical lithological reservoirs - lenticular reservoirs, upclined pinch-out reservoirs and structure-lithological reservoirs - at first, then analysis these reservoirs about the accumulation conditions at sand level, buries depth, structural location, sedimentary system, physical property of reservoir, trap-filling index, and petroliferous properties. The results suggests that sand bodies in all the three areas are benefit for the formation of oil pool, but the petroliferous properties varies.Furthermore, 14 sand bodies of lithological reservoirs in Linnan subsag are statistically analyzed in terms of the basic and structure properties of sand bodies, sedimentary properties, reservoir properties, petroliferous properties and so on. Combine with the analysis of typical pools, it is suggested that the main factors which dominate the formation of lithological pools in Linnan subsag are structural properties, sedimentary facies, oil generation and oil expulsion intension of source rocks, and reservoir conditions.On the basis of statistical analysis, the Analytic Hierarchy Process (AHP) is used to analyze the factors that influent the petroliferous properties of lithological reservoirs in Linnan subsag, and to determine the weights of each facter: the reservoir subsystem and the oil generation/expulsion subsystem of Linnan subsag determines the oil saturation, with its weights of 0.57 and 0.28, in which the buried depth is closely contacted to oil saturation. Reservoir and migration/accumulation subsystem effects obviously to the fullness of lithological oil pool in this area, with its weights of 0.5 and 0.26. Based on all of these, the petroliferous properties quantitative-predict model is established. Then petroliferous property model of lithological pool in Linnan subsag is established using the mathematical geology method of stepwise regression and culling variables. According to this model and combined with the major formation factors, five favorable targets of Jishan delta lithological oil pool is predicted, favorable zones are suggested -Jiangjiadian-wawu delta fit for lenticular reservoirs development, and Yingzijie zone for structure-lithological reservoirs formation.更多还原