准噶尔盆地西北缘中拐、五、八开发区佳木河组天然气与石油成藏差异性研究  

Differences between Oil and Gas Accumulations in Zhongguai,5^(th) & 8^(th) Districts of Karamay Oil Field,Northwestern Margin of Junggar Basin

作　　者：杨海风[1] 柳广弟[1] 雷德文[2] 韩永强[2] 黄志龙[1] 高岗[1] 

机构地区：[1]油气资源与探测国家重点实验室(中国石油大学(北京)),北京102249 [2]中国石油新疆油田公司勘探开发研究院,新疆克拉玛依834000

出　　处：《高校地质学报》2008年第2期262-268,共7页Geological Journal of China Universities

基　　金：中国石油天然气股份公司重点科技攻关项目“准噶尔盆地西北缘滚动精细勘探(2005-2009)”资助

摘　　要：准噶尔盆地中拐、五、八开发区佳木河组天然气与石油成藏特征的研究表明,天然气与石油在成藏上存在明显差异,体现在分布特征、母质来源、成藏期次及直接盖层条件等四个方面。天然气主要分布在远离盆地边缘主断裂的区域,而石油分布在主断裂附近;天然气主要来源于佳木河组腐殖型烃源岩,石油来自风城组腐泥型烃源岩;晚期成藏是天然气成藏的重要特征,石油的成藏时间则相对较早;当直接盖层厚度小于10m时,难以形成纯气层,但是可以形成小规模的油藏。There are significant differences between accumulations of crude oil and accumulations of natural gas in their distribution, hydrocarbon source, accumulation time and caprock thickness in Zhongguai, 5^th and 8^th districts of Karamay Oilfield, Junggar basin, Northwest China. The natural gas accumulations occur in the localities far away from the Ke-Bai thrust fault and are mainly sourced from over-matured humic kerogen in the Jiamuhe Formation of the Permian. However, the crude oil reservoirs are distributed in the localities near the fault, and are chiefly derived from the matured sapropelic kerogen in the Fengcheng Formation of the Permian. The charging time of the natural gas was later as compared with that of the crude oil, although both of them were accumulated in the Late Triassic to Jurassic. The cap rocks less than 10 m thick could hardly seal natural gas, but could effectively seal small scale crude oil reservoirs in this area.

关 键 词：油气成藏 中拐 五 八开发区 佳木河组 准噶尔盆地 

分 类 号：P618.130[天文地球—矿床学]