济阳坳陷郑家-王庄油田稠油生物降解程度及影响因素研究

Biodegradation Level of Heavy Oil and Geological Control Factors in Zhengjia-Wangzhuang Oil f ields,Jiyang Depression

 王振奇^{1, 2} 于赤灵² 张林晔³ 刘俊民³

 1长江大学地球科学学院 2中国科学院广州地球化学研究所有机地球化学国家重点实验室 3胜利油田有限公司地质科学研究院

根据原油和油砂抽提物生物标志物的垂向和平面变化规律,结合原油物性变化特征,综合确定研究区原油生物降解程度为2～8级;垂向上生物降解程度是上轻下重,平面上
为北轻南重、东轻西重。研究区原油生物降解程度受油水边界类型、古地形面貌、构造格局、不整合面特征及储层温度等地质因素的综合控制。

Based on the alteration of biomarks and physical
p roperties of crude oils and oil sands in vertical and p lanar,
the heavy oil biodegradation extent of Zhenjia2Wangzhuang
oilfields of J iyang dep ression are level 2～8 on the Peters and
Moldowan scale. Biodegradation levels of heavy oils become
slight gradually from bottom to top in the oil column and from
south to north, west to east in the research area.
Biodegradation degree of heavy oils in the area are mainly
controlled by oil2water contact ( OWC ) type, ancient
topographty, structure situation, distribution of
unconformable surface and reservoir temperature