英台气田营二段致密气藏富集规律研究

发布时间：2018-07-23 18:00

【摘要】：致密气藏是近两年中国天然气增储上产的主要气藏类型,其岩性复杂、储层致密、气藏在纵向和横向变化较快,虽然具备较大的开发潜力,但是研究难度也逐渐提升,尤其是其气藏的富集规律的研究是近年来致密火山岩气藏攻关的重点领域。英台气田营二段是吉林油区近两年来发现的天然气主要产能建设区,储层岩性以火山碎屑岩、火山沉积岩为主,物性致密,为典型的致密气藏。本文通过分析营二段致密气藏成藏特点,从烃源岩、微构造及沉积特征开展研究,通过源岩分析,落实营二段北、中、南三个源岩有利区;依据精细的构造解释以及与气井产量的对比分析,认为南北构造高部位易于烃类的运聚成藏,而中部断裂发育,使源岩与储层得到有效沟通,且断裂附近的储层微裂缝发育,易于形成优质储层,同样是气藏富集的有利区域;通过对本区沉积特征的认识,营二段岩性虽源于火山喷发,但为水动力搬运沉积,储层的特征受水动力沉积特征影响较大,通过岩性结构构造等沉积标志分析,本区为近源扇沉积环境,发育四个主要的扇体发育区,其中扇中及扇前缘更易于形成优质储层,是气藏富集的主要区带,通过烃检测验证,营二段在工区的南部、中部、北部形成了受烃源岩、构造、沉积三重因素控制下的三个主要富集区。
[Abstract]:Tight gas reservoir is the main type of gas reservoir in China in the last two years. Its lithology is complex, the reservoir is compact, the gas reservoir changes rapidly in vertical and horizontal direction, although it has great potential for development, the research difficulty is gradually increased. Especially, the study on the enrichment law of its gas reservoir is the key area of the tight volcanic gas reservoir in recent years. Ying2 member of Yingtai gas field is the main natural gas productivity construction area discovered in Jilin oil area in recent two years. The reservoir lithology is mainly composed of pyroclastic rock, volcanic sedimentary rock and dense physical property, so it is a typical tight gas reservoir. In this paper, through analyzing the reservoir forming characteristics of the tight gas reservoirs in the second member of Yingshan formation, the source rocks, microstructures and sedimentary characteristics are studied, and through the analysis of the source rocks, three favorable areas of the north, middle and south source rocks of the second member of Ying are realized. On the basis of fine structural interpretation and comparative analysis with gas well production, it is considered that hydrocarbon migration and accumulation is easy in the high part of the north and south structure, while the middle fault is developed, which makes the source rock and reservoir get effective communication, and the microfracture of reservoir near the fault is developed. It is easy to form high-quality reservoir, which is also a favorable area for gas reservoir enrichment. Through the understanding of the sedimentary characteristics of this area, although the lithology of the second member of Ying formation originated from volcanic eruption, it is a hydrodynamic transport deposit, and the characteristics of reservoir are greatly affected by hydrodynamic sedimentary characteristics. Through the analysis of sedimentary markers such as lithologic structure and structure, this area is a near-source fan sedimentary environment, and develops four main fan body development areas, in which the middle fan and the front fan edge are more likely to form high-quality reservoirs, which are the main zones for gas reservoir enrichment, which are verified by hydrocarbon detection. In the southern, central and northern parts of the working area, three major rich areas were formed in the second member of the camp, which are controlled by the triple factors of source rock, structure and sedimentation.
【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

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