松辽盆地太东地区葡萄花油层储层评价及其油气分布控制作用

发布时间：2018-04-03 04:10

  本文选题：太东地区　切入点：沉积相　出处：《东北石油大学》2017年硕士论文

【摘要】：九十年代以来由于有利的正向构造均已被钻探,寻找新的含油气构造难度越来越大,而由于地质研究不足,使太东地区的地质特征、油气水关系、油藏类型及分布规律尚未认识清楚,导致勘探进展缓慢,难以打开新的局面。为解决这一系列的问题,本文对太东地区葡萄花油层储层及其对油气分布控制作用进行研究。首先应用高分辨率层序地层学原理和方法建立姚一段层序地层格架,进行层序地层划分对比,认为姚家组一段底部为不整合面和姚家组一段与二、三段之间的密度段为Ⅰ类层序界面。姚一段内部发育可区域对比的泥岩层为Ⅱ类层序界面。以识别出的三个层序界面为边界,依据沉积基准面升降原理识别出低水位体系域(Ⅰ)和湖盆扩张体系域(Ⅱ)。根据内部的发育较广泛的泥岩层作为内部细分的标志层,将太东地区葡萄花油层划分为7个准层序。在地层划分对比的基础上,充分利用地震、钻井、测井资料,对低水位和湖盆扩张体系域的沉积环境进行了综合分析,识别出太东地区葡萄花油层主要发育三角洲前缘亚相,包括水下分流河道、河口坝、远砂坝以及席状砂微相;以点-线-面的研究思路对研究区的沉积微相进行研究,结果表明:研究区为典型的“退积式”沉积,平面上主要发育北部物源和西部物源,7个准层序自下而上,河道沉积逐渐萎缩,1号准层序大面积为湖相沉积。然后,在储层的宏观和微观发育特征以及有效物性研究的基础上,利用钻井、录井、试油、地震等开发数据对油藏进行精细解剖结果表明,太东地区发育3个油气聚集带,每个油气聚集带由于沉积相带、断裂特征、储层物性不同各自有不同的油藏类型和油水分布规律。西部斜坡油气聚集带为岩性—构造油藏,宋芳屯鼻状构造油气聚集带为断块油藏;永乐向斜油气聚集带为岩性油藏。最后,在储层发育特征和油水分布规律研究的基础上,研究储层对油气分布的控制作用,结果表明,太东地区葡萄花油层储层对油气分布的控制作用主要体现在两个方面:(1)储层沉积相类型控制着油气分布,位于三角洲内前缘亚相的分流河道砂岩厚度大、含油性好、单井产能高;(2)储层物性控制着油气的产能,储层的孔隙度越大油气的总产能就愈高,储层渗透率越大单井油气产能越高。
[Abstract]:Since the 1990s, because favorable forward structures have been drilled, it is becoming more and more difficult to find new petroliferous structures. However, due to insufficient geological research, the geological characteristics and oil-gas-water relationship in Taidong region have become more and more difficult.Reservoir types and distribution laws are not well understood, resulting in slow exploration progress and difficult to open up a new situation.In order to solve this series of problems, this paper studies the reservoir of Putaohua reservoir and its controlling effect on oil and gas distribution in Taidong area.Firstly, the sequence stratigraphic framework of the first member of Yao formation is established by using the principle and method of high-resolution sequence stratigraphy, and the sequence stratigraphic division and correlation are carried out. It is considered that the bottom of the first member of the Yao formation is unconformable surface and the first and second member of the Yao formation.The density segment between the three members is a class I sequence interface.The mudstone layer which can be contrasted regionally developed in the first member of Yao formation is a class 鈪，

本文编号：1703549