大庆油田安达向斜油气富集规律与成藏模式

发布时间：2018-05-01 22:27

本文选题：向斜 + 成藏模式　；参考：《东北石油大学》2015年硕士论文

【摘要】：安达向斜位于大庆市东南,在构造上位于松辽盆地北部中央坳陷区三肇凹陷的北部,西接大庆长垣、东临明水阶地,北为黑鱼泡凹陷。作为滨北地区与三肇凹陷的过渡带,主要目的层为扶余油层。尽管在安达向斜岩性油藏的勘探近几年虽取得了长足进步,但是,由于该地区跨多个油气运聚单元,致使不同区域、不同构造位置的油气分布规律、成藏主控要素不明确,使得对周边地区的资源前景认识不够深入,严重制约了周边地区的勘探步伐。通过本项目研究及科技攻关,建立了安达向斜超压控深—断裂控边的断压双控成藏模式。安达向斜断裂密集、复杂,侧向封闭性较好,储层砂体连续性较差,不具备远距离运聚条件。同时,构造发育史研究表明,安达向斜受构造调整,明末沉积时期沉积中心位于现今沉积中心的西侧,与现今油气显示匹配,油气分布受控于古沉降中心。在上述分析基础上,明确了安达向斜的油气成藏区带。因此通过对安达向斜自身石油地质条件及成藏规律的研究,一方面可以揭示安达向斜自身的油气成藏规律及勘探潜力,同时也可以进一步明确对周边地区小型凹陷致密油的勘探部署思想,为后期周边地区致密油储量的整体认识和提升储量品质提供技术支撑。
[Abstract]:The Anda syncline is located in the southeast of Daqing city, structurally located in the north of Sanzhao sag in the central depression of north Songliao basin, in the west of Daqing Placanticline, in the east of Mingshui terrace, and in the north of black fish bubble sag. As a transitional zone between Binbei area and Sanzhao sag, the main target layer is Fuyu reservoir. Although great progress has been made in the exploration of lithologic reservoirs in the Anda syncline in recent years, due to the migration and accumulation of oil and gas across many units in this area, the distribution of oil and gas in different regions and different structural positions is not clear, and the main controlling elements of reservoir formation are not clear. It makes the understanding of the resource prospect of the surrounding area not deep enough, and restricts the exploration step of the surrounding area seriously. Through the research of this project and the research of science and technology, the overpressure-controlled deep-fault-controlled reservoir formation model of Anda syncline is established. The Anda syncline is characterized by dense faults, complex faults, good lateral sealing, poor continuity of reservoir sand bodies and no conditions for long-range migration and accumulation. At the same time, the study of tectonic development history shows that the depositional center of Anda syncline is located on the west side of the present sedimentary center in the late Ming Dynasty, which matches the present oil and gas display, and the distribution of oil and gas is controlled by the paleo-subsidence center. On the basis of above analysis, the hydrocarbon forming zone of Anda syncline is defined. Therefore, through the study of the petroleum geological conditions and reservoir formation laws of the Anda syncline, on the one hand, the oil and gas accumulation law and exploration potential of the Anda syncline can be revealed. At the same time, the idea of exploration and deployment of compact oil in the surrounding small depression can also be further clarified, which can provide technical support for the overall understanding of the compact oil reserves in the surrounding areas and the improvement of reserve quality.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

【参考文献】