丰富川1230井区长2油藏特征描述与剩余油研究

发布时间：2018-05-23 14:41

本文选题：长2油藏 + 油藏描述　；参考：《西安石油大学》2015年硕士论文

【摘要】：鄂尔多斯盆地是我国最早发现油田的盆地之一,也是我国第二大含油气盆地,油气资源丰富,鄂尔多斯盆地延长组为一套坳陷型内陆碎屑湖盆。丰富川位于鄂尔多斯盆地陕北斜坡东部斜坡的中南段,油田自2002年投入开发,2004年最高时年产量30万吨,2009年产油量下降到6.7万吨,2010年原油产量6万吨。随着开发不断推进,在有限新的资源区块问题下,对原有老区块再认识、精管理是油田稳产的必要技术方向。本文选取丰富川油田典型井区1230长2油藏为研究对象,从该区特低渗透储层地质评价分析入手,开展研究区目的层段地层、构造、沉积微相、成岩相带、砂体展布、油层有效厚度、地质储量分布研究,最终通过数值模拟研究并确定研究区长2储层剩余油分布。从而为有效地对剩余油分布富集区进行调整挖潜,提供重要保障。研究认为:1230井区为岩性油气藏,构造作用对油藏控制不明显,为三角洲平原沉积,其中分流河道是油气聚集的有利场所,研究区技术可采储量约为24.39×104t。根据地质建模与油藏数值模拟结果,研究区长21-2仍是主要的富集区,长21-3、长21-4次之;长21-1剩余油较少。
[Abstract]:The Ordos Basin is one of the earliest oilfields discovered in China and the second largest oil and gas bearing basin in China with abundant oil and gas resources. The Yanchang formation of the Ordos Basin is a set of depression type inland clastic lacustrine basin. The rich Sichuan is located in the middle and south section of the eastern slope of northern Shaanxi slope in Ordos Basin. The oil field was put into development in 2002, the annual output in 2004 was 300000 tons, the oil production decreased to 67000 tons in 2009, and the crude oil output in 2010 was 60,000 tons. With the development advancing continuously, under the limited new resource block problem, it is the necessary technical direction of stable production of oil field to recognize the original old block again. This paper selects 1230 Chang 2 reservoir in the typical well area of rich Sichuan Oilfield as the research object, starting with the geological evaluation and analysis of the ultra-low permeability reservoir in this area, develops the stratigraphy, structure, sedimentary microfacies, diagenetic facies belt and sand body distribution of the target formation, structure, sedimentary microfacies, diagenetic facies and sand body in the study area. The effective thickness of reservoir and the distribution of geological reserves are studied. Finally, the remaining oil distribution of Chang 2 reservoir is determined by numerical simulation. Thus, it provides an important guarantee for the adjustment and tapping of potential in the rich area of remaining oil distribution. It is considered that the area of well No. 1230 is a lithologic reservoir, and the tectonic action is not obvious to the reservoir. It is a delta plain deposit. The distributary channel is a favorable place for oil and gas accumulation, and the technical recoverable reserve in the study area is about 24.39 脳 10 ~ (4) t. According to the results of geological modeling and reservoir numerical simulation, Chang 21-2 is still the main rich area, Chang 21-3, Chang 21-4, and Chang 21-1 have less remaining oil.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13;TE327

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