摘要
油源对比是油气地质研究中必不可少的一种技术,本文对油源对比方法进行了简单介绍,其中生物标志化合物对比法是最常使用的方法。近年来鄂尔多斯盆地延长组中下组合油藏的发现使其成为勘探开发的热点话题。通过对鄂尔多斯盆地长9烃源岩发育范围、生烃潜力以及长9油层组原油地球化学特征的研究,发现鄂尔多斯盆地志丹南部地区长9油层组发育有较好的烃源岩,生烃潜力高,最大厚度可达20 m以上,通过对比发现志丹地区长9油层组的原油与长9暗色泥岩烃源岩生物标志化合物组成相似,有较近的亲缘关系;其它地区长9油层组的原油与长7油层组烃源岩具有较近的亲缘关系。因此,鄂尔多斯盆地志丹及其邻近地区长9油层组的原油有长9油层组的烃源岩贡献,其它地区绝大部分为长7油层组的烃源岩贡献,与鄂尔多斯盆地延长组长9油层组烃源岩分布是一致的。
Oil source comparison is an indispensable technology in oil and gas geology research.This paper briefly introduces the oil source comparison method,and the biomarker compound comparison method is the most commonly used method.In recent years,the discovery of the middle and lower combined reservoirs of the Yanchang Formation in the Ordos Basin has become a hot topic in exploration and development.Based on the study of the developmental range,hydrocarbon generation potential and geochemical characteristics of the Chang 9 oil-bearing group in the Ordos Basin,it is found that the Chang 9 oil-bearing formation in the southern part of the Zhidan area of the Ordos Basin has good source rocks and hydrocarbon generation potential.The high and maximum thickness can reach more than 20 meters.It is found that the crude oil of the Chang 9 oil layer group in the Zhidan area is similar to the biomarker compound of the long dark mudstone source rock in the Zhidan area,and has a close genetic relationship.In other areas,the Chang 9 oil layer group Crude oil has a close relationship with the source rocks of the Chang 7 oil formation.Therefore,the crude oil of the Chang 9 oil-bearing formation in Zhidan and its adjacent areas in the Ordos Basin has the contribution of the source rocks of the Chang 9 oil-bearing formation,and most of the other areas contribute to the source rocks of the Chang 7 oil-bearing formation,and the length of the Yanchang Formation in the Ordos Basin is 9.The distribution of source rocks in the reservoir group is consistent.
作者
任帅锋
康昱
夏小雨
Ren Shuaifeng;Kang Yu;Xia Xiaoyu(Department of Geology,Northwest University,Xi'an 710000,China)
出处
《山东化工》
CAS
2019年第5期76-78,共3页
Shandong Chemical Industry
基金
国家基础科学人才培养基金西北大学地质学科学研究培训项目(XDCX2018-08)
