磨溪￣高石梯地区龙王庙组古油藏成藏特征

Characteristics of paleo-oil reservoir of Longwangmiao Formation in Moxi-Gaoshiti Area

 张涛 3 马行陟 3 赵卫卫¹ 范俊佳 3 鲁雪松 3 严少怀⁴

西安石油大学，陕西 西安 710065 中国石油勘探开发研究院，北京 100083 中国石油天然气集团公司盆地构造与油气成藏重点实验室，
北京 100083 中国石油大庆头台油田开发有限责任公司，黑龙江 大庆 166512）

 为了确定磨溪￣高石梯地区古油藏的分布范围,并进一步认识其流体性质及规模，文中利用储层定量颗粒荧光、全息扫描荧光技术，结合显微激光拉曼分析等手段，对该地区寒武系龙王庙组古油藏进行了深入剖析。磨溪￣高石梯地区储层段龙王庙组沥青发育，定量荧光分析结果显示，各井储层颗粒定量荧光都存在相对的高值，半峰宽普遍较低，TSF光谱最常用的参数总体表现为低值，激光拉曼光谱显示出了沥青的特征。研究表明：该地区存在一定规模的古油藏，古油藏总体表现为正常油—轻质油，现今残余沥青成熟度较高，古油层主要以层状分布，多发生原位裂解，与现今气藏有较好的匹配关系。

 In order to determine the paleo-oil reservoir′s distribution range in Moxi-Gaoshiti Area and to have a further understanding of the fluid properties and scale of paleo-oil reservoir, the quantitative fluorescence technique, total scanning fluorescence, and the Raman spectroscopy methods are used to analyze the paleo-oil reservoir of Cambrian Longwangmiao Formation in Moxi-Gaoshiti Area. The Longwangmiao Formation reservoir developed bitumen. The results of quantitative fluorescence techniques show relatively high value of QGF index of each well, wide half-peak width, and generally low λ and R1; laser Raman spectroscopy shows the characteristics of bitumen. Researches show that it has certain scale paleo-oil reservoir in this area and the paleo-oil reservoir is of normal oil and light oil; now with the higher residual bitumen maturity, paleo-oil reservoir is mainly of stratiform and tends to occur in situ cracking, it has good matching relationship with the current gas reservoir.

10.6056/dkyqt201704007