地质通报Issue(12)：2051-2057,7.
陕西渭河盆地固市凹陷生物气资源潜力
An analysis of formation conditions of biogenic gas in Gushi depression, Wei-he basin, Shaanxi Province
摘要
Abstract
Researches on geological environment of Neogene Zhangjiapo Formation in Gushi depression of Weihe basin show that the conditions of high deposition rate,thick deposition,average formation temperature between 48.09℃to 78.24℃, proper salinity and optimum Ph values of water media are favorable for the generation of biogenic gas. The analytical result of water-soluble gas samples from geothermal wells show that the content of CH4 is extremely high, heavy hydrocarbon is rare, andδ13C1 values are less than-60‰. It is thus concluded that the water-soluble gas in this area is biogenic gas. The analysis of Zhangjiapo Formation source rock shows that the average values of organic carbon and chloroform bitumen"A"are 0.46%and 0.041%, respectively. The type of organic matter isⅡ1 and the mean value of Ro is 0.56%, belonging to biochemical to thermal catalytic transitional stage. The biogenic gas formation condition of Gushi depression is identical to that of Sanhu area which is the famous biogenic gas field. Calculation shows that there exists certain exploration prospect of biological gas in this area.关键词
生物气/有机质演化/资源潜力/新近系/固市凹陷/渭河盆地Key words
biological gas/organic matter evolution/resources potential/Neogene/Gushi depression/Weihe basin分类
天文与地球科学引用本文复制引用
张雪,刘建朝,李荣西,王行运,翁凯..陕西渭河盆地固市凹陷生物气资源潜力[J].地质通报,2014,(12):2051-2057,7.基金项目
中国地质调查局项目 （）
