塔里木盆地东部震旦—寒武白云岩类型及成因  

THE TYPES AND GENESIS OF CAMBRIAN AND SINURIAN DOLOSTONE IN EASTERN TARIM BASIN

作　　者：刘永福[1] 桑洪[1] 孙雄伟[1] 党青宁[1] 朱长见[1] 

机构地区：[1]中国石油塔里木油田公司勘探开发研究院,新疆库尔勒841000

出　　处：《西南石油大学学报（自然科学版）》2008年第5期27-31,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：通过详细的岩芯描述及镜下薄片观察,对塔东地区近年钻遇的震旦系至寒武系白云岩进行了初步研究,总结出该区白云岩主要由结晶白云岩(粗晶、中晶、细晶、粉晶白云岩和粉-泥晶或泥-粉晶白云岩)、残余藻纹层白云岩、残余鲕粒白云岩组成。通过碳、氧同位素、均一包裹体测温、白云石有序度分析及微观岩石薄片研究将该地区的白云岩总结为渗透回流白云石化、混合水白云石化、高温热液(水)白云石化3种成因。其中,高温热液(水)白云石化作用最有利于本地区储集空间的发育。By means of core description and rock thin section observation,the Cambrian and Silurine dolostones penetrated in eastern Tarim Basin recent years are studied.It is recognized that the dolostones in the area are mainly composed of crystallized dolostone(coarse crystal,mid-crystal,fine crystal,silt crystal and silt-dolomicrita),residual algal lamina dolostone and residual oolite dolostone.The geochemical analysis of Carbon and Oxygen isotopes,homo-inclusion temperature measurment,dolomite order degree and rock slide inspectation indicates the dolostones can be divided into three types of genesis,i.e.,high temperature hydrothermal fluid dolomization,seepage reflux dolomization and mixed water dalomization.Among them,the first type is the most favorable for the development of pore space in the area.

关 键 词：塔里木盆地东部 震旦系 寒武系 白云岩 成因 

分 类 号：TE122.2[石油与天然气工程—油气勘探]