小草湖次凹西山窑组烃源岩特征及资源量再评价  

Revaluation of Characteristics and Resources of Source Rock of Xishanyao Formation in Xiaocaohu Sub-depression

作　　者：常通 程开虎 白栋 解楠 CHANG Tong;CHENG Kai-hu;BAI Dong;XIE Nan(School of Earth Sciences and Engineering,Xi’an Shiyou University,Xi’an 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi’an Shiyou University,Xi’an 710065,China;China Shaanxi nuclenr industry group 214 brigade Co.,ltd,Xi’an 710054,China)

机构地区：[1]西安石油大学地球科学与工程学院,西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,西安710065 [3]中陕核工业集团214大队有限公司,西安710054

出　　处：《西安文理学院学报（自然科学版）》2022年第4期95-101,共7页Journal of Xi’an University(Natural Science Edition)

基　　金：陕西省教育厅重点研究计划(17JS109):“鄂尔多斯盆地奥陶系高过成熟度烷烃气甲-乙烷倒转机理研究”。

摘　　要：为明确小草湖西山窑组煤系烃源岩的发育特征及资源量,根据钻井资料和地球化学分析数据,对西山窑组煤系烃源岩进行评价,应用ΔLogR技术对烃源岩纵向评价,明确研究区有效烃源岩展布,在此基础上计算生烃强度,并结合多图叠合发圈定有效生烃面积进行预测J2x资源量.结果表明:由泥岩和煤有机质类型分别为Ⅱ2-Ⅲ型、Ⅲ型;暗色、炭质泥岩均为中等—好和煤为差烃源岩,处于成熟阶段;J2x石油和天然气预测资源量分别为66.05~106.4(10^(6)t)、254~401(10^(8)m^(3)).通过多因素综合分析小草湖地西北部区将是下一步天然气勘探重点区域.该研究对下一步明确小草湖地区油气勘探具有重要参考价值.In order to clarify the development characteristics and resource amount of coal measures source rocks of Xishanyao formation in Xiaocaohu,according to drilling data and geochemical analysis data,the coal measures source rocks of Xishanyao formation are evaluated,andΔLogR technology is used to longitudinally evaluate the source rocks.on this basis,the hydrocarbon generation intensity is calculated,and the effective hydrocarbon generation area is determined by multi-map overlap to predict the amount of J2x resources.The results show that the organic matter types of mudstone and coal areⅡ2-ⅢandⅢrespectively,dark mudstone and carbonaceous mudstone are medium-good and coal are poor source rocks,which are in the mature stage,and the predicted resources of J2x oil and natural gas are 66.05~106.4(10^(6)t)and 254~401(10^(8)m^(3)),respectively.Through the comprehensive analysis of multi-factors,the northwest area of Xiaocaohu will be the key area of natural gas exploration in the next step.This study has important reference value for defining oil and gas exploration in Xiaocaohu area in the next step.

关 键 词：吐哈盆地 小草湖地区 煤系烃源岩 西山窑组 ΔLogR技术 生烃强度 资源量预测 

分 类 号：TE13[石油与天然气工程—油气勘探]