鄂尔多斯盆地延安探区延长组油源对比研究

Oil-source correlation of Yanchang formation in Yan ’an exploration area, Ordos Basin

烃源岩与其所生成的油气具有亲缘关系,生物标志化合物是来自动植物体内,经过热演化过程以干酪根形式保存下来,其中包含了丰富的地质信息,这些地质信息可以展示该地区的沉积环境及物源来源,通过对这些较稳定的生物标志化合物在原油和烃源岩之间对比,从而确定出研究区油-岩关系,为进一步揭示研究区内优质烃源岩对油气藏形成的贡献作用。由于油气成藏形成中经历多次运移和多源供烃等地质作用,所以利用单一的生物标志物参数很难准确的确定出油源关系,需要综合多个生物标志化合物综合分析才能全面的把握研究区内的油源关系。

The source rocks are related to the oil and gas generated by them. The biomarkers come from plants and animals and are preserved in the form of kerogen through thermal evolution, which contains abundant geological information, these geological information can show the sedimentary environment and the source of material in this area. Through the comparison of these relatively stable biomarkers between crude oil and source rock, the oil-rock relationship in the study area can be determined, in order to reveal further the contribution of high quality source rocks to the formation of oil and gas reservoirs in the study area. Because of the geological processes such as multiple migration and multi-source hydrocarbon supply during the formation of oil and gas reservoirs, it is difficult to accurately determine the oil-source relationship by using single biomarker parameters, the comprehensive analysis of multiple biomarkers is needed to grasp the oil-source relationship in the study area.