DIAGENESIS MODEL AND PORE EVOLUTION OF FELDSPAR-RICH SANDSTONE RESERVOIRS IN SONGLIAO BASIN

Xing Shunquan; Jiang Hongqi

doi:10.11743/ogg19900401

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DIAGENESIS MODEL AND PORE EVOLUTION OF FELDSPAR-RICH SANDSTONE RESERVOIRS IN SONGLIAO BASIN
Vol. 11, Issue 4, Pages: 351-360(1990)
Online First：25 December 1990，

Published：1990
DOI： 10.11743/ogg19900401
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DOI：

Xing Shunquan, Jiang Hongqi. DIAGENESIS MODEL AND PORE EVOLUTION OF FELDSPAR-RICH SANDSTONE RESERVOIRS IN SONGLIAO BASIN[J]. 1990, 11(4): 351-360. DOI： 10.11743/ogg19900401.

摘要

松辽盆地的油气储层以陆相沉积的富长石砂岩为主

在盆地高地温场的条件下

成岩作用有其独特的模式。本文根据砂岩薄片

X 射线衍射粘土矿物分析

扫描电镜和电子探针

还用显微热台研究了石英次生加大边内气液包裹体的均一温度

阴极发光下成岩矿物定量分析等测试手段。对埋藏深度500—3200m 范围内砂岩储层的成岩标志研究后

建立了富长石砂岩成岩演变模式。将砂岩储层划分出早成岩阶段、中成岩阶段早期、中成岩阶段晚期、晚成岩阶段早期和晚成岩阶段晚期共3个阶段5期。指出松辽盆地白垩系砂岩储层中存在三个次生孔隙发育带。

Abstract

The oil and gas reservoirs that are mainly composed of continental feldspar-rich sandstones in the Songliao Basin have a distinctive diagenesis model due to high geother-mal field of the basin.After the study of diagenetic indication for the sandstone reservoirs buried at the depth of 500-3200m based on thin section

X-ray diffraction

SEM

electronic probe

the uniform temperature and salinity of the gas-liquid inclusions in the overgrowth of qartz and the quantitative analysis of diagenetic minerals in cathodoluminescence

this pa-per sets up a diagenetic model of feldspar-rich sandstones

divided the diagenetic evolutioninto 3 stages and 5 phases such as early stage

the early and late phases of the middle stage

the early and late phases of the late stage

and then points out three zones of secondary pores.