松辽盆地齐家—古龙凹陷油气成藏期次研究

STUDY ON THE POOL-FORMING PERIODS OF OIL AND GASIN QIJIA-GULONG SAG IN SONGLIAO BASIN

侯启军 冯子辉 邹玉良

Hou Qijun Feng Zihui Zou Yuliang

中国科学院 长沙大地构造研究所, 长沙 410001 2. 吉林大学, 长春 130061 3. 大庆油田有限责任公司, 黑龙江 大庆 163712

Changsha Institute of Tectonics, Chinese Academy of Sciences, Changsha, Hunan 410001, China 2. Jilin University, Changchun, Jilin 130065, China 3. Daqing Oil field Company Ltd., Daqing, Heilongjiang 163712, China

松辽盆地齐家—古龙凹陷在扶余、高台子、葡萄花、黑帝庙等多套油层获工业油流。应用储层包裹体均一温度以及显微傅立叶变换红外光谱等分析技术,结合储层的热演化史,探讨了各套油层的油气成藏特征。有机包裹体的类型和特征显示,青一段源岩生成的原油向储层中运移主要有3个期次,不同油层经历的成藏期次各异,储层中原油的性质是油气多期成藏的综合反映。包裹体均一温度指示凹陷内油气3个成藏期分别是嫩江组沉积末期、白垩纪末期和老第三纪末,油气成藏期次与盆地构造发展历程表现出较好的一致性。

There are a series of oil-and gas-bearing reservoirs in Qijia-Gulong Sag in Songliao Basin,including Fuyu,Gaotaizi,Putaohua,Heidimiao,etc.The characteristics of these reservoirs were discussed according to the homogenization temperatures of reservoir inclusions and micro-Fourier transform infrared spectroscopic analysis combining thermal evolution histories of the reservoirs.The types and characteristics of the organic inclusions indicate that there are 3 main migration periods of oil and gas generated from K1q1 source rock.There are different pool-forming periods for different reservoirs,and the oil/gas properties of reservoirs are the comprehensive reflection of multi-period pool-forming processes.The homogenization temperatures of inclusions show that the 3 pool-forming periods of the oil and gas in the sag are in the ends of K1n,K and E respectively.The pool-forming periods are well consistent with the tectonic-developing history in the basin.

https://doi.org/10.11781/sysydz200504390