川东南地区灯影组储层特征及其控制因素研究.doc

川东南地区灯影组储层特征及其控制因素研究

[摘要] 川东南地区灯影组是一套以潮坪相白云岩为主的地层,其储层主要分布在中、上部。通过对灯影组储层薄片观察及物性资料分析发现,储集空间主要为次生溶蚀孔、洞、缝,储层类型为低孔低渗的裂缝-孔洞型储层。储层发育受沉积相和成岩作用的双重影响,沉积相是储层形成的基础,成岩作用则决定了储层的储集性能好坏;压实作用、胶结作用、硅化作用是破坏孔隙的主要成岩作用,溶蚀作用(特别是表生期古喀斯特作用)、破裂作用是发育次生孔隙的主要成岩作用。
[关键词]川东南;灯影组;储层特征;控制因素
Reservoir features and controlling factors of Dengying Formation in Southeast Sichuan, China

Abstract: The Sinian Dengying Formation is a set of tidal flat dolostone in Southeast Sichuan. The dolostone reservoir is dominantly distributed over the top and middle of the Dengying Formation. Based on the flake observation and physical properties data of the reservoir in Dengying Formation, this study indicates that the main reservoir spaces are pores, caves and fissures with secondary origin and the reservoir is a fractured-porous type with low porosity and low permeability. The reservoir’s development is influenced by both sedimentary facies and diagenesis and the sedimentary facies are the basis of its development and diagenesis process controlled by the reservoir’s ability. Cementation, compaction and silicification are the major diagenesis for destroying pores. Denudation and fracturing are the major diagenesis for forming secondary pores.
Key words: Sichuan Basin; Dengying Formation; reservoir characteristic; controlling factors
川东地区下-中三叠统的锶同位素曲线及年代地层划分
常晓琳,石和,罗威,宋莹,万明礼
成都理工大学沉积地质研究院,成都 610059
[摘要]从川东邻水和渠县采集的73个下-中三叠统锶同位素样品获得了对应于地层累计厚度的锶同位素演化曲线。-三叠系锶同位素曲线对比,将川东下-中三叠统剖面进行了年代地层的划分对比。根据剖面中获得的牙形石化石,讨论了对四川地区三叠系底界的确定,认为应尽可能采用综合的地层学方法对沉积地层进行年代地层划分对比。
[关键词]川东地区; 三叠系; 锶同位素地层学; 三叠系底界; 牙形石
Sr isotopic curve of the Lower-Middle Triassic of East Sichuan and the chronostratigraphic division
CHANG Xiao-lin, SHI He, LUO Wei, SONG Ying, WAN Ming-li
Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
Abstract: Strontium isotope stratigraphy is a new method to divide and contrast strata. This paper sets up an evolution c