实验模拟碳酸盐岩储层包裹体对油气充注的响应  

Experimental Simulation of Fluid Inclusion Response to Hydrocarbon Charge in Carbonate Reservoir

作　　者：葛云锦[1,2] 陈勇[2] 周瑶琪[2] 周振柱[2] 

机构地区：[1]延长石油(集团)有限责任公司研究院,陕西西安710075 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266555

出　　处：《地球科学进展》2011年第10期1050-1056,共7页Advances in Earth Science

基　　金：国家自然科学基金项目"碳酸盐岩烃类包裹体捕获机制及其成岩成藏响应:来自实际储层温压条件的人工合成包裹体证据"(编号:40902040);中央高校基本科研业务费专项资金项目"储层流体包裹体形成机制与分析方法研究"(编号:10CX05004A);中国石油科技创新基金研究项目"准南霍-玛-吐构造带油气成藏过程流体示踪研究"(编号:2010D-5006-0106)资助

摘　　要：设计了一系列不同油水比(3/7,5/5,7/39,/1)的实验,以冰洲石为主矿物合成了烃类包裹体,为探讨碳酸盐岩烃类流体包裹体的形成机制提供了一条有效途径。镜下观察及显微荧光分析发现:样品中合成的包裹体沿裂隙分布,表明微裂隙愈合过程中捕获包裹体,烃类和盐水包裹体既同时出现在同一裂隙中,又有分带出现的情况。样品中合成的烃类包裹体数量随油水升高而增多。烃类包裹体所发荧光与实验原油荧光特征一致。显微测温研究显示:不同油水比条件下形成的包裹体均一温度并无明显差异,油气饱和度不是包裹体均一温度的主要影响因素,均一温度受压力及气液相成分影响。实验结果显示,油气对晶体生长和包裹体的形成有抑制作用,但不会终止其形成。油气包裹体的大量形成对应着油气充注的关键时期。油水不混溶造成烃类包裹体和盐水包裹体分带出现。Synthetic oil（hydrocarbon）-bearing inclusion were synthesized in Iceland crystal with different Oil/water ratios（3/7,5/5,7/3,9/1）,which provided better means for researching the mechanism of trapping oil（hydrocarbon）-bearing inclusion in carbonate.Through microscopic observation and micro-fluorometry,it could be seen that the inclusions distributed along the microcrack,which demonstrated that inclusions were trapped during the process of crack healing.Oil and brine inclusions not only distributed in the same crack,but also in different zone.The quantity of synthetic oil（hydrocarbon）-bearing inclusions increased company with the O/W ratios rising.The fluorescence characteristic of oil inclusions and oil adopted in experiment was coincident.There were no apparent differences among the homogenization temperature of inclusions from different sample.Therefore the hydrocarbon saturation was not the main influential factor of homogenization temperature.Homogenization temperature was affected by pressure and gaseous and liquid phase composition.It could be concluded that crystal growth and inclusions trapping were inhibited by oil and gas,but not terminated.The critic time of hydrocarbon accumulation coincided with trapping much oil inclusions.Zonation of oil and brine inclusions distribution was caused by immiscibility effect between oil and water.

关 键 词：油气充注 烃类包裹体 人工合成 碳酸盐岩 裂隙愈合 

分 类 号：P618.130.2[天文地球—矿床学]