松辽盆地北部长春岭背斜油源识别及油源区资源评价

Oil-source identification and resource evaluation of oll-source area of Changchunling anticline in Northern Songliao Basin

关键词:  松辽盆地北部  长春岭背斜  王府凹陷  油源  资源评价

Key words:  Northern Songliao Basin  Changchunling anticline  Wangfu depression  oiUsource  resource evaluation

摘要:

通过分析原油成熟度差异、油气优势运移方向、油气分布规律、圈闭对油气运移的屏蔽作用及烃源岩地化特 征，并结合化学动力学方法对松辽盆地北部长春岭背斜油源及油源区资源暈进行研究。结果表明:长春岭背斜原油 与王府凹陷原油成熟度相近，且明显低于三笨凹陷和朝阳沟阶地原油成熟度,长春岭背斜位于王府凹陷油气优势运 移方向上，原油平面上环王府凹陷分布，朝阳沟阶地对由肇凹陷而来的油气具有屏蔽作用，长春岭背斜原油主要 来源于王府F1陷;王府凹陷青山口组烃源岩有机质丰度高、类型好，但成熟度较低，其油、气生成量分别为13.6幻0llt 和4.4xl08 m³，油、气资源量分别为(0.68 ?2.72)xl0 t 和(0.022 ?0. 088)xl0n m³。

Abstract:

By analyzing the difference of crude oil maturity, preferred direction of hydrocarbon migration, distribution of hydrocarbon ,shielded effect of trap on hydrocarbon migration, and geochemical characteristics of source rocks，and by combining with chemistry kinetic method, the oil-source of Chmigchunling anticline in Northern Songliao Basin, and the resource of its oil-source area were studied. The results show that the crude oil maturity of Changnhunling anticline is similar to that of Wangfu depression, but significantly lower than that of Sanzhao depression and Chaoyanggou terrace. Changchunling anticline is on the preferred direction of hydrocarbon migration from Wangfu depression. The distribution of crude oil is around Wangfu depression on level. Chaoyanggou terrace shields the hydrocarbon migration from Sanzhao depression to Changchunling anticline. The crude oil of Changchunling anticline comes mainly from Wangfu depression. The source rocks of Qingshankou formation in Wangfu depression are high abundance of organic matter, good type, but low maturity. The amount of oil and gas generation from Qingshankou formation are 13.6xlOn t and 4.4xl08 m³ in Wangfu depression, and the resource of oil and gas are (0.68-2.72) xlO8 t and (0.022-0.088) xlO11 m³ respectively.