烃气在泥岩和砂岩中的微渗漏特征及油气勘探意义  

Micro-seepage of hydrocarbon gas in mudstone and sandstone and its significance for oil and gas exploration

作　　者：黄臣军[1] 王国建[1] 卢丽[1] 杨帆[1] 高俊阳[1] 

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院无锡石油地质研究所,江苏无锡214126

出　　处：《石油实验地质》2013年第4期445-448,472,共5页Petroleum Geology & Experiment

基　　金：国家自然科学基金项目(41072099)资助

摘　　要：利用2个小型的烃气微渗漏实验装置,模拟了泥岩和砂岩中烃气微渗漏的变化规律,研究发现测点的烃组分含量达到平衡后则相对稳定,且平衡后的各组分占总烃含量的百分比不受测点烃组分及总烃含量大小的影响,而与测点至烃源的距离有关。这一特征在油气勘探上具有2点启示:一是通过实验模拟或实地测量烃组分的平衡时间,可以计算烃气的微渗漏速率,进而可以根据烃气的微渗漏模式来估算油气藏的散失量;二是通过井中化探或气测录井研究烃组分占总烃含量的百分比在垂向地层中的变化规律,可以预测油气藏的深度。Two mini apparatus were initially made and employed for the experimental simulation of hydrocarbon gas micro-seepage through mudstone and sandstone separately. It was found out that the ratio of hydrocarbon gas components would maintain stable if they had reached the balance state in a certain sampling point and the balanced componential percentage in the total hydrocarbon was in positive correlation with the distance between sampling point and hydrocarbon resource. These characters On one hand, the balance time could be calculated of hydrocarbon micro-seepage have two pieces of significance ： through experimental research or field measurement. According to the balance time, the micro-seepage velocity of hydrocarbon gas could be accounted, as well as the micro-seepage amount of hydrocarbon gas from a reservoir further according to micro-seepage model. On the other hand, through the study of the characteristics of the vertical curve of hydrocarbon componential percentage in total hydrocarbon tested from core geochemical exploration or hydrocarbon gas logging, the depth of a potential reservoir is likely to be predicted.

关 键 词：烃类微渗漏 烃组分分异 平衡时间 油气藏散失量 油气藏深度 实验模拟 

分 类 号：TE132.4[石油与天然气工程—油气勘探]