二连盆地阿尔凹陷资源潜力评价

发布时间：2018-06-22 04:55

  本文选题：测井评价烃源岩 + 资源潜力　； 参考：《东北石油大学》2017年硕士论文

【摘要】：阿尔凹陷位于中国与内蒙古边界附近,构造上隶属于二连盆地巴音宝力格东北部隆起区。凹陷发育腾一段和阿尔善组两套湖相烃源岩层。资源潜力评价是一个阿尔凹陷进行深化勘探的基石,发现后备资源,落实储量,是勘探面临的问题;开展资源潜力评价,落实勘探潜力,明确油气的运聚方向,能为圈闭目标落实提供依据,具有非常重要的意义。本文基于阿尔凹陷已有的地球化学分析化验、较为系统的测井资料和其他构造、地层、储层、圈闭和油藏资料,通过应用测井烃源岩评价和盆地模拟、资源评价技术,对该凹陷进行了详尽的烃源岩评价;分析了油气的运聚特征,定量地模拟生、排烃量,计算了凹陷油气资源量;明确了各构造带的剩余资源潜力,指出下步的主要勘探潜力区。通过使用测井-有机地化一体化评价流程与体系,有效地开展了烃源岩单井评价,借助层序地层学研究成果,分析了烃源岩平面的展布特征。分析研究表明:阿尔凹陷腾一段烃源岩以中等-优质烃源岩为主,阿尔善组烃源岩以中等-差烃源岩为主;阿尔善组优质烃源岩厚度50-100m,在南部的罕乌拉和哈达构造带处较大,最大厚度可以达到100m;腾一段优质烃源岩厚度50-300m,在南部的罕乌拉-沙麦构造带处较大,最大可以达到300m;腾一段优质烃源岩比阿尔善组优质烃源岩厚度大、分布面积更广。根据地化分析结果,确定了腾一段烃源岩为Ⅰ-Ⅱ1型,阿尔善组为Ⅱ1-Ⅱ2型。根据镜质体反射率确定了凹陷的生烃门限,腾一段、阿尔善组烃源岩都为成熟生油岩。盆地模拟的关键是参数的选择,地史、生烃史等参数,是依据实测的多数据点,反复拟合确定的。利用盆地模拟、资源评价方法,确定了阿尔凹陷油气资源量,总资源量为10251×104t(腾一段资源量为6057×104t,阿尔善组资源量为4194×104t)。凹陷生油量为11.39×108t,腾一段生油量的贡献率为60%,阿尔善组生油量的贡献率为40%;优质烃源岩生油量的贡献率为84%,为烃源岩生油量的主要贡献者;腾一段优质烃源岩为主力供烃层系。根据盆地模拟、成藏模拟技术和综合地质评价,认为阿尔凹陷的勘探潜力区是:阿尔善组现今时期北部油势运聚方向在哈达构造中心处,向哈达北构造、AE1井区处、AD2井区处聚集;中部油势运聚方向从哈达构造和沙麦构造中心处朝四周发散,南部油势运聚方向朝罕乌拉处聚集。腾一段现今时期北部油势运聚方向在哈达中心处朝哈达北、AE1井处、AD2井处聚集;中部油势运聚方向在沙麦构造处及AE63下部聚集;南部油势运聚方向朝罕乌拉处聚集。通过成藏模拟显示,沙麦构造带、哈达构造带聚集有较大资源量。
[Abstract]:Ar Sag is located near the boundary between China and Inner Mongolia and belongs to the northeast uplift of Bayinbaolag in Erlian Basin. There are two sets of lacustrine source rocks in Tengyi formation and Alshan formation in the sag. The evaluation of resource potential is the cornerstone of deepening exploration in an Al sag, the discovery of reserve resources and the implementation of reserves are the problems facing exploration, and the evaluation of resource potential, the implementation of exploration potential, and the direction of oil and gas migration and accumulation are carried out. It is of great significance to provide the basis for the implementation of the trap target. This paper is based on geochemical analysis, systematic logging data and other structural, stratigraphic, reservoir, trap and reservoir data in Al Sag, and the application of logging source rock evaluation and basin simulation, as well as resource evaluation techniques. The hydrocarbon source rocks in the sag are evaluated in detail, the migration and accumulation characteristics of oil and gas are analyzed, the quantity of hydrocarbon generation and hydrocarbon expulsion is quantitatively simulated, the amount of oil and gas resources in the sag is calculated, the potential of remaining resources in each structural zone is defined, and the main exploration potential areas in the next step are pointed out. By using the integrated evaluation process and system of logging and organic geochemistry, the single well evaluation of source rock is carried out effectively, and the distribution characteristics of hydrocarbon source rock plane are analyzed with the help of sequence stratigraphic research results. The results show that the source rocks of the Tengyi member in the Al Sag are mainly medium-quality source rocks, the source rocks of the Alshan formation are mainly intermediate-differential source rocks, the thickness of the high-quality source rocks of the Alshan formation is 50-100 m, which is relatively large in the southern Hanwula and Hada structural zones. The maximum thickness can reach 100 m, and the thickness of high quality source rocks in Tengyi formation is 50-300 m, which is larger than that in the southern Hanwula-Shamai structural zone, and the thickness and distribution area of the high quality source rocks in the first section is larger than that of the high-quality source rocks in the Alshan formation. Based on the results of geochemistry analysis, it is determined that the source rocks of the Tengyi formation belong to type 鈪，

本文编号：2051672