埋藏压实-侧向挤压过程对库车坳陷深层储层物理性质的改造机理

发布时间：2018-05-01 09:21

本文选题：深层储层 + 埋藏压实　；参考：《现代地质》2017年02期

【摘要】：早期长期浅埋、后期快速深埋及晚期强烈的侧向挤压作用是西部前陆盆地共性的地质演化过程,埋藏(机械)压实-侧向挤压过程对深层砂岩储层岩石物理性质与储集性具有重要的改造作用。开展成岩物理模拟实验研究,并与实际地质分析相结合,探索改造作用机制的演化过程,认为持续的垂向压实作用使储层碎屑颗粒由松散状至紧密堆积。在晚期侧向挤压、持续垂向埋藏压实共同作用下,深层碎屑颗粒表现为明显的共轭双方向定向排列特征。在快速垂向压实和强烈的侧向挤压应力作用下,石英、长石等颗粒内出现明显的无定向微裂缝、共轭剪切微裂缝。微裂缝的出现可增强颗粒的可溶蚀性,提高储层渗透性。明确埋藏(机械)压实-侧向挤压过程对深层砂岩储层物理性质与储集性的改造作用机制,对评价与预测深层有利储层的分布具有积极作用。
[Abstract]:Early long-term shallow burial, late rapid deep burial and late intense lateral extrusion are the common geological evolution process of Western foreland basin. Buried (Mechanical) compaction lateral extrusion process has important transformation effect on rock physical properties and reservoir properties of deep sandstone reservoirs. The evolution process of the mechanism is explored, and the evolution process of the mechanism is explored. It is considered that the continuous vertical compaction makes the clastic particles from the loose to close accumulation. In the late lateral extrusion and the continuous vertical burial compaction, the deep clastic particles are characterized by the obvious alignment of the conjugated sides. Under the action of lateral extrusion stress, there are obvious non directional micro cracks in quartz and feldspar particles and conjugate shear microcracks. The appearance of micro cracks can enhance the solubility of the particles and improve the permeability of the reservoir, and the mechanism of the transformation of the physical properties and reservoir properties of the buried sandstone reservoir to the deep sandstone reservoir is clearly defined. The evaluation and prediction of the distribution of deep favorable reservoirs play a positive role.

【作者单位】：中国石油勘探开发研究院实验研究中心;提高石油采收率国家重点实验室(中国石油勘探开发研究院);
【基金】：国家科技重大专项“前陆冲断带及复杂构造区地质演化过程、深层结构与储层特征”(2016ZX05003-001) 中国石油天然气股份有限公司课题“深层油气勘探开发理论认识与技术集成”(2014E-3209)
【分类号】：P618.13

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