冀中坳陷蠡县斜坡沙河街组油气成藏模式研究

发布时间：2018-06-05 00:13

  本文选题：蠡县斜坡 + 沉积微相　； 参考：《东北石油大学》2017年硕士论文

【摘要】：本文针对蠡县斜坡构造样式相对单一,但沉积类型多样,变化期次多,多种类型圈闭与成藏配置关系复杂等问题,对主力含油气层系沉积相与沉积微相进行了研究,希望认清冀中坳陷蠡县斜坡富油圈闭相控影响因素,建立富油圈闭综合评价标准。为了弄清蠡县斜坡富油圈闭相控影响因素,本文重新厘定了蠡县斜坡沙二段、沙三段的层序地层方案,把原认为的沙一段尾砂岩归为沙二段的高水位体系域,同时底部应发育低位体系域,应存在一套砂岩;而沙三段上部正常为高位体系域,应以一套进积的砂体为特征。并明确了沉积相对于砂体的控制作用,并对于油气水关系有合理的解释。研究认为浅水三角洲前缘优质砂体利于油气的富集。前缘相带砂体发育,波浪改造明显,储层质量优越,且靠近油源,具有近源储层易成藏的条件。三角洲前缘分流河道与河口沙坝常可叠加连片,形成规模较大优质储集砂体,形成连片成藏规模。通过研究后发现,微相边缘是导致物性封闭岩性成藏的原因。各类成因砂体边缘常常是砂体厚度变薄、含泥质增加、储集物性变差位置,这一方面制约了油气充注的效率,一方面又形成封堵条件。尤其是受构造影响的上倾方向发生微相变化或砂体减薄时,物性封闭成藏成为可能,这是宽缓斜坡近油源上生下储成藏模式中的独特类型,是形成斜坡带岩性油气藏的一种重要类型。在上述研究基础上,总结出了蠡县斜四种区带成藏模式:(1)中外带同口-雁翎地区多源供油构造岩性复合成藏模式;(2)高阳-西柳地区顺向断层岩性对接成藏模式;(3)雁翎-任西洼槽潜山过渡带复式油气聚集成藏模式;(4)斜坡中南部中、外带低丰度多层叠加连片成藏模式。
[Abstract]:In view of the relatively single structural styles in Lixian County slope, the sedimentary facies and sedimentary microfacies of the main oil and gas bearing strata are studied in various types of sedimentary types, many types of change period and complex relationship between the various types of traps and the distribution of reservoir. It is hoped to recognize the factors affecting the phase control of the Xie Pofu oil trap in Lixian County, Jizhong depression, and establish a comprehensive oil trap synthesis. In order to understand the factors affecting the phase control of the oil rich traps in the Lixian County slope, the sequence stratigraphic scheme of the two section of the Lixian County slope and the three sand section of the sand is redefined, and the sand one tailed sandstone originally considered as the high water level system region of the two section of the sand should be classified, at the same time, the low system tract should be developed at the bottom, and a set of sandstone should exist, while the upper part of the three section of the sand is normal. The high system domain should be characterized by a set of accumulated sand bodies. The control effect of sedimentation relative to the sand body is clearly defined and the relationship between the oil and gas water is reasonably explained. The study holds that the high quality sand body in the front of the shallow water delta is beneficial to the enrichment of oil and gas. The delta front distributary channel and the estuarine sand dam are often superimposed to form a large scale and high quality reservoir sand, forming a large scale of reservoir formation. This aspect restricts the efficiency of oil and gas filling. On the one hand, the efficiency of oil and gas filling is restricted, and the sealing conditions are formed on the one hand. Especially when the upward inclination of the structure affects the micro phase change or the thinning of the sand body, it is possible for the physical property to be closed and formed. This is the unique type in the near oil source and the reservoir formation model of the wide slow slope, which is the formation of the slope zone rock. An important type of sexual oil and gas reservoir is made. On the basis of the above study, four types of reservoir forming models of Lixian County slope are summed up: (1) the multi source oil supply structural lithologic complex formation pattern in the same mouth Yanling region, and (2) the lithologic docking model of the Shun direction fault in the Gaoyang xulu area, and (3) the complex hydrocarbon accumulation and accumulation of the Yanling - Ren west depression in the transitional zone of the West Depression (4) in the middle and southern part of the slope, the low abundance and multi-storey superimposed cascade accumulation mode.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13
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本文编号：1979487