压实过程中砂岩韧性岩屑的变形特征及其对孔隙度影响的实验研究

发布时间：2018-05-24 17:21

本文选题：韧性岩屑 + 压实作用　；参考：《吉林大学》2015年硕士论文

【摘要】：由于成岩作用提出了相关研究成岩作用的概念，取得了长足的进步，特别是在石油和天然气勘探领域。压实成岩的重要组成部分，对孔隙演化及储层性质有很大的影响。通过广泛的研究可能会显示压实在砂岩孔隙结构和分布有显著影响，导致大幅减少的孔隙空间。但是,学者们在多年来对于储层成岩作用方面的有关研究,关于压实作用对砂岩中韧性岩屑的变形特征及其对孔隙度影响的关注往往更多偏向于一些简短、定性的描述和分析,在压实模拟实验方面的研究并不是很多。为了进一步探索压实作用过程中塑性岩屑的变形特征及对孔隙度的影响,我们以渤海盆地为目标区，以该盆地的地质背景为参考，进行了相关的模拟实验。中国的渤海湾盆地东部陆相断陷盆地，全流域探明超过733×108桶原油储量，，是中国最大的石油发现盆地，至今已有近半个世纪的探索史，勘探潜力非常大。通过研究区资料可以确定盆地储层岩石类型主要为长石岩屑砂岩，岩屑长石砂岩和岩屑砂岩的一小部分，与基础，中粒和粗细粒度，其次是排序等上。在背景作为基准的相关实验为条件下，设计和实施相对比较完善的实验。实验样品选用含有一定数量的韧性岩屑的河沙，含量比例及粒度均参考渤海盆地储层的相关参数，利用“三轴岩石变形实验系统”，完成了相关实验。设计指标为：模拟深度0-4000m，间隔深度500m，压力范围0-120Mpa，间隔为1.5MPa，实验结果显示：随埋深加大，孔隙率随之变小，二者呈负相关关系；压缩量的实现主要由孔隙率的缩小和碎屑变形来完成；韧性岩屑的变形以韧性变形为主；晶屑的变形主要表现为脆性破裂，导致碎屑的粒径变小。该研究对于油气勘探和开发具有一定的参考价值。
[Abstract]:Due to diagenesis, the concept of diagenesis has been put forward and great progress has been made, especially in the field of oil and gas exploration. The important part of compaction diagenesis has great influence on pore evolution and reservoir properties. Extensive studies may show that compaction has a significant effect on the pore structure and distribution of sandstone resulting in a significant reduction in pore space. However, over the years, scholars have studied the diagenesis of reservoir, and the attention of compaction on the deformation characteristics of ductile cuttings in sandstone and its influence on porosity tends to be more inclined to brief, qualitative description and analysis. There is not much research on compaction simulation experiment. In order to further explore the deformation characteristics of plastic cuttings and their influence on porosity during compaction, we take the Bohai Basin as the target area and the geological background of the basin as a reference, and carry out relevant simulation experiments. The continental faulted basin in the eastern Bohai Bay basin in China, with over 733 脳 108 barrels of crude oil reserves, is the largest oil discovery basin in China. It has been explored for nearly half a century and has great exploration potential. The reservoir rock types in the basin are mainly feldspathic sandstone, lithic feldspathic sandstone and lithic sandstone. Under the condition of background related experiments, relatively perfect experiments are designed and implemented. The experimental samples are selected to contain a certain amount of ductile debris, the content ratio and particle size of the reservoir are referenced to the relevant parameters of the reservoir in the Bohai Basin, and the relevant experiments are completed by using the "triaxial rock deformation experimental system". The design indexes are as follows: the simulated depth is 0-4000m, the interval depth is 500m, the pressure range is 0-120Mpaand the interval is 1.5MPa. The experimental results show that the porosity decreases with the increase of the buried depth, and there is a negative correlation between them. The deformation of ductile rock debris is mainly ductile deformation, and the deformation of grain debris is mainly characterized by brittle fracture, which results in the grain size becoming smaller. This study has certain reference value for oil and gas exploration and development.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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