台北凹陷西部油气运移和勘探方向分析

Analysis for Hydrocarbon Migration and Exploration Target in West of Taibei Sag

台北凹陷西部的油源基本上都来自胜北洼陷,由于胜北洼陷生油岩埋藏深,从胜北洼陷到周边的葡北、胜金口-葡萄沟,从火焰山下盘的火8井区到西部的神泉-胜南、亚尔湖及雁木西-盐山口地区,油气显示的最深层位逐渐变浅,原油密度逐渐变轻,根据构造格局、原油物性、原油饱和烃成分等分析,台北凹陷的油气存在着从胜北洼陷到葡北-玉果、胜金口-葡萄沟、从胜北洼陷到火焰山下盘的火8井区、从火8井区到神泉-胜南、再从神泉-胜南到雁木西-盐山口地区和亚尔湖-吐参1井附近的几个运移方向。根据油气运移方向,寻找油气藏,是勘探工作的主要方法之一,从而分析和指出了相应的几个方向的勘探领域。

Oil and gas in the west of Taibei sag come from Shengbei depression basically. Because the hydrocarbon source rock in Shengbei depression bury deeply, from Shengbei depression to its circumjacent area, such as Pubei, Shengjinkou, Putaogou, and from Huo 8 borefield ,which is located on the footwall of Huoyanshan fault, to Shenquan- shengnan, Yaerhu, Yanmuxi -yanshankou area, oil -gas showings depth reveals shallower and shallower gradually, and petroleum density becomes fighter and fighter similarly. Analyzing with structure pattern, petroleum physical property, and saturated hydrocarbon component, and so on, there exist several oil - gas migration directions including that removing from Shengbei to Pubei -Yuguo, and to Shengjinkou -Putaogou, and that removing from Shengbei depression to huo 8 borefield, and then to Shenquan - Shengnan, and afterwards to Yanmuxi - Yanshankou, and finally to Yaerhu - Tucan 1 area, etc. Searching for hydrocarbon pool with the oil - gas migration direction is one of the main prospecting ways. Using such method, potential areas situated on the oil - gas migration directions were pointed out.