CAJ | 학술논문

四川盆地东北部长兴组储集层主要由细-中晶白云岩组成，其次为微晶白云岩。根据薄片观察、阴极发光、电子探针分析发现，细-中晶白云岩与微晶白云岩在阴极发光特征方面很相似，都不发光，且在Mg、Ca、Fe、Mn、Sr和 Ba含量方面也没有区别。根据上述分析结果认为，研究区的细-中晶白云岩是微晶白云岩在准同生期重结晶形成的，控制重结晶的主要因素是引起准同生白云石化的蒸发卤水下渗。这一认识为确定研究区白云岩储集层的空间分布提供了新的思路。
사천분지동북부장흥조저집층주요유세-중정백운암조성，기차위미정백운암。근거박편관찰、음겁발광、전자탐침분석발현，세-중정백운암여미정백운암재음겁발광특정방면흔상사，도불발광，차재Mg、Ca、Fe、Mn、Sr화 Ba함량방면야몰유구별。근거상술분석결과인위，연구구적세-중정백운암시미정백운암재준동생기중결정형성적，공제중결정적주요인소시인기준동생백운석화적증발서수하삼。저일인식위학정연구구백운암저집층적공간분포제공료신적사로。
The Changxing Formation reservoir in northeastern Sichuan Basin is mainly composed of fine to medium sized crystalline dolomites,and some mud sized crystalline dolomites secondly.Observation of thin sections under cathodoluminescence reveals that the fine-medium sized crystalline dolomites and mud sized crystalline dolomites look very dark.Micro-probe analysis reveals that the Mg,Ca,Fe,Mn, Sr,Na and Ba content is constant from the core of the fine-medium sized crystalline dolomite crystals to their margins,thus it is speculated that the fine-medium sized crystalline dolomites are transformed from previous mud sized crystalline dolomites by recrystallization in penecontemporaneous period.The main fac-tor controlling the recrystallization is the infiltration high-Mg brine caused by evaporation which provides new ideas for determining the reservoir distribution of dolomites in the study area.