松辽盆地齐家致密油区青山口组有效烃源岩评价  

An Evaluation of Qingshankou Formation Effective Source Rocks in Tight Oil Region of Qijia Area,Songliao Basin

作　　者：赵荣[1] 刘顺宇[1] ZHAO Rong;LIU Shunyu(School of Earth Sciences, Northeast Petroleum University, Daqing, Heilongjiang 163318, China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163318

出　　处：《中国锰业》2018年第2期88-95,共8页China Manganese Industry

基　　金：国家科技重大专项(2011ZX05028-002)

摘　　要：以松辽盆地齐家地区青山口组致密油为例,讨论了致密油有效烃源岩评价标准。利用12口取心井的岩心资料和70多口取样井的地化数据,将齐家地区青山口组烃源岩分为Ⅰ类和Ⅱ类。在此基础上,综合前人的研究成果,根据质量守恒原理,建立残留烃和有机碳含量的关系、有机碳含量和厚度的关系,并确定有机碳含量下限、有效排烃厚度。通过生烃潜量、镜质体反射率和深度关系确定排烃门限和对应的成熟度,划分齐家地区有效烃源岩中Ⅰ类源岩有机碳含量在1.8%以上,厚度为0.9~2.8 m,镜质体反射率大于0.8%,Ⅱ类源岩有机碳含量在1.2%以上,厚度为0.7~1.5 m,镜质体反射率大于0.8%。研究结果显示:齐家致密油区有效烃源岩主要分布齐家—古龙凹陷的中部和南部。Taking the tight oil in Qingshankou Formation of Qijia area in Songliao Basin as an example,we have discussed the evaluation standards of effective source rocks. We have also utilized the core data of 12 coring wells,including the geochemical data of 70 sampling wells to classify source rocks in Qingshankou Formation into Type-Ⅰand Type-Ⅱ. On this basis,we are combining with previous achievements establish the relationship between retention hydrocarbon and organic carbon content to determine the lower limit of organic matter abundance parameter. We will try to establish the relationship between organic carbon content and thickness to determine the effective expulsion thickness according to mass conservation law. We obtain hydrocarbon expulsion threshold in corresponding maturity by the relationship of potential hydrocarbon generation amount,vitrinite reflectance and depth. We divide the effective source rocks of Qijia area-the organic carbon content more than 1. 8%,including the thickness from 0. 9 meter to 2. 8 meters. The vitrinite reflectance is more than 0. 8% of Type-Ⅰ and the organic carbon content is more than 1. 2%. The thickness is from 0. 7 meter to 1. 5 meters and the vitrinite reflectance is more than 0. 8% of Type-Ⅱ. The research results show that the effective source rocks mainly distribute in the central and south district of Qijia area.

关 键 词：有效烃源岩 评价标准 有机碳含量下限 有效排烃厚度 成熟度 

分 类 号：P618.13[天文地球—矿床学]