多参数地球化学勘探在沙漠地区圈闭构造含油气潜力评价中的应用——以塔里木盆地TD-2构造为例  

Application of multi-parametric geochemical exploration to hydrocarbon potential evaluation for trapped structure in desert area: A case study of TD-2 structure in Tarim basin, China

作　　者：李志明[1] 张长江[1] 宋喜林 

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214151 [2]中国石油东方地球物理勘探有限责任公司,河北涿州072751

出　　处：《地质通报》2009年第11期1668-1673,共6页Geological Bulletin of China

基　　金：中国石油塔里木盆地石油勘探与开发指挥部项目<塔里木盆地塔东2构造油气地球化学勘探>资助

摘　　要：TD-2构造位于塔里木盆地中央隆起带东部,虽然地震和重力勘探证实其是一个基底隆起背斜构造,并且据区域地质构造演化分析具有良好的油气潜力,但因缺乏地球化学信息,进一步的勘探(如钻探)尚未进行。由此,开展了多参数地球化学勘探,所用参数为土壤游离烃(C1—C5)、酸解烃(C1—C5)、ΔC和Hg。结果的综合解释得出:对评价沙漠区TD-2构造的油气潜力来说,游离烃明显好于其他地球化学参数;近地表地球化学异常的形态和地球化学特征暗示,TD-2构造是一个含干气的构造,处于低—中等的逸散阶段。因此,TD-2构造应当具有一定的油气潜力。多参数地球化学勘探结果为进一步的勘探提供了重要依据。TD-2 structure locates in the eastern area of the central uplift zone of Tarim basin, China. Although it is a basement-uplift anticline type structure which is verified by seismic and gravity exploration, according to analysis of regional geological evolution history, and it should have potential good for oil and gas, the further exploration such as drilling is suspended because of lacking geochemical information. Therefore, multi-parametric geochemical survey is conducted. These geochemical parameters include free hydrocarbons （C1-C5）, acid hydrocarbons （C1-C5） of soil, AC amd Hg. Interpretation of the results leads to the conclusions that the flee hydrocarbons are obviously more viable than other geochemical parameters for oil and gas potential evaluation of TD-2 structure in desert area, and the shapes of near-surface geochemical anomalies and geochemical characteristics parameters suggest that TD-2 structure is a dry gas-bearing structure at the early-middle dissipation stage. So TD-2 structure should have promising potential for oil and gas. and the results of multi-parametric geochemical survev have provided important information for further exploration.

关 键 词：多参数地球化学勘探 油气潜力评价 TD-2构造 塔里木盆地 

分 类 号：P618.13[天文地球—矿床学] P632[天文地球—地质学]