采样季节对油气化探中游离烃方法的影响讨论  

Influence of Sampling Seasons on Soil Gas Method in Surface Geochemical Prospecting for Oil and Gas

作　　者：王国建[1] 杨帆[1] 卢丽[1] 唐俊红[2] 

机构地区：[1]中石化石油勘探开发研究院无锡石油地质研究所,江苏无锡214151 [2]杭州电子科技大学环境工程与环境科学研究所,浙江杭州310018

出　　处：《石油天然气学报》2010年第4期166-170,共5页Journal of Oil and Gas Technology

基　　金：国家自然科学基金项目(40973076);中国石油化工集团公司科技开发项目(P05069)

摘　　要：从室内试验和已知油气区方法应用两个方面来探讨采样季节对于反映油气动态信息的壤中游离烃方法指标的影响。研究结果表明,在雨季,由于土壤润湿对物理吸附态烃类的解吸作用,提高了土壤颗粒间隙的游离烃浓度;在旱季,由于土壤干燥,使烃类易于被土壤颗粒物理吸附,使壤中游离烃浓度较雨季低。因此,游离烃方法的采样季节选择土壤润湿的雨季可能较理想,较高浓度的游离烃有利于识别和预测下伏油气藏的存在。Different sampling seasons in surface geochemistry exploration had little effect on 'fossil' indicators,but more effect on the content of 'active' indicators corresponding to hydrocarbon dynamic information. The latter was in short of further study. The wet-season influence on soil gas method was discussed from two aspects of laboratory experiments and method of application in oil and gas province.The results show that the concentration of free hydrocarbon in soil grain pores in wet-season is higher than that in dry-season,because wet soil adsorbs the physical adsorbed hydrocarbon from soil particle surface,whereas hydrocarbon is subject to adsorbed soil grain surface in dry-season. To choose wet-season as sampling season of soil gas method is thought to be more effective. Free hydrocarbon with higher concentration in soil gas is favorable to discriminate or predict the existence of hydrocarbon reservoirs.

关 键 词：油气化探 游离烃 采样季节 油气藏 

分 类 号：P618.13[天文地球—矿床学]