摘要
川中东北地区须家河组储层虽然在整体上属于低孔～低渗储层,但在局部仍然发育孔渗相对较好的优质储层。这里通过对沉积作用、成岩作用,以及破裂作用如何影响储层发育程度等方面进行研究,探讨并分析了须家河组优质储层的形成条件与影响因素。研究区须家河组砂岩属辫状河三角洲沉积体系,以发育水上、水下分流河道为显著特征。储层经历了较为复杂的成岩演化过程,受多种成岩作用综合影响。研究认为:沉积相是研究区须家河组优质储层形成的基本条件,岩性是优质储层形成的物质基础,成岩作用是优质储层形成最重要的控制因素,而裂缝是优质储层形成的关键。
Xujiahe formation in northeastern area of central Sichuan basin mainly belongs to low porosity and low permeability reservoirs, but the qualified reservoirs are still developed locally with relatively good porosity and permeability. Through discussing sentimental diagnosis and fracture function analysis which influences the reservoir development, the paper analyzed the forming condition and influencing factors of the high quality reservoir in Xujiahe formation. Xujiahe formation is characterized by braided delta depositional system, with the main features of distributary channels. Reservoir has experienced comparatively complex diagnoses evolution, affected by many kinds of diagnoses effects. Sedimentary facies in Xujiahe is the most basic requirements of the formation of high quality reservoirs. The lithology is the material foundation for preferable promised reservoir formation. Diagenesis is the controlling factor of a good reservoir while the fractures are the key point through which the preferable reservoir formed.
出处
《物探化探计算技术》
CAS
CSCD
2012年第2期132-137,5,共6页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家专项课题(2008EX05001-05-01)
关键词
川中东北部地区
须家河组
优质储层
主控因素
northeastern area of central Sichuan basin
Xujiahe formation
qualified reservoirs
main controlling factors
