埋藏环境硫酸盐岩岩溶发育的微生物机理  

Bacterial Mechanism of the Development of Sulfate Karst in Burial Environment

作　　者：张凤娥[1] 张胜[1] 齐继祥[1] 张云[1] 宋淑红[1] 

机构地区：[1]中国地质科学院水文地质环境地质研究所,河北石家庄050061

出　　处：《地球科学（中国地质大学学报）》2010年第1期146-154,共9页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金项目(No.40572144);国家重点研究发展规划"973"项目(No.2006CB403200)

摘　　要：针对我国广泛分布的碳酸盐-硫酸盐岩混合建造,选择其中的硫酸盐岩作为研究对象,通过室内水-岩和水-岩-细菌两个封闭系统的硫酸盐岩溶蚀模拟实验,模拟了细菌数、温度、时间等因素对反应系统水化学组分的影响,研究了两个系统内的地球化学作用.结果表明,水-岩系统内发生的是硫酸盐岩溶解作用;水-岩-细菌系统内发生了细菌硫酸盐还原作用和细菌硫酸盐还原驱动的硫酸盐岩溶解作用,导致埋藏环境硫酸盐岩岩溶的发育,进而增强了与硫酸盐岩共生的碳酸盐岩的渗透性.研究成果开拓了油气储层古岩溶研究的新思路.The present work is designed to simulate the dissolution of sulphate rock under various conditions of different bacterial cell numbers, temperatures and reaction times both in water-rock and water-rock-bacteria systems by laboratory experiment. The results show that chemical dissolution of sulphate rock is dominated in water-rock system, while bacterial sulphate reduction process and the dissolution of sulphate rock driven by bacterial sulphate reduction are dominated in water-rock-bacteria system. The dissolution of sulphate rock driven by bacterial sulphate reduction resultes in the formation of sulphate karst, which enhances the permeability of carbonate rock coexisted with sulphate rock. The research is an insight into biokarst, which provides a new perspective for the field of petroleum geology.

关 键 词：硫酸盐岩岩溶 硫酸盐还原菌 细菌硫酸盐还原 水-岩-细菌系统 埋藏环境 水文地质 

分 类 号：P641[天文地球—地质矿产勘探] X141[天文地球—地质学]