天然气地球化学

松辽盆地莺山断陷深层天然气地球化学特征与各套烃源岩定量贡献

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  • 1.东北石油大学地球科学学院,黑龙江 大庆 163318;
    2.大庆油田有限责任公司勘探开发研究院,黑龙江 大庆 163712
张博为(1989-),男,黑龙江大庆人,博士研究生,主要从事地质资源与地质工程研究. E-mail:857602305@qq.com.

收稿日期: 2016-04-19

  修回日期: 2016-06-30

  网络出版日期: 2019-09-06

基金资助

国家自然科学基金项目“油源断裂转换带优势输导运移油气条件研究”(编号:41372153);国家重点基础研究发展计划(“973”)项目“火山岩油气藏分布规律与资源预测”(编号:2009CB219308)联合资助.

Geochemical characteristics of natural gas and the contribution ratio of source rocksin the Yingshan Fault Depression of the Songliao Basin

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  • 1.Northeast Petroleum University,Daqing 163318,China;
    2.Exploration and Development Research Institute of Daqing Oilfield Company Ltd.,Daqing 163712,China

Received date: 2016-04-19

  Revised date: 2016-06-30

  Online published: 2019-09-06

摘要

根据莺山断陷深层天然气组成及轻烃指纹、组分碳同位素、烃源岩等地球化学分析资料,对天然气和烃源岩评价认为,营城组和沙河子组天然气主要是腐殖型和腐泥型的混合成因气,具有高—过成熟演化特征;沙河子组为好—中等烃源岩,营城组为中等—好烃源岩,有机质类型以Ⅲ型为主、Ⅰ型和Ⅱ型为辅;侏罗系为好烃源岩或非_差烃源岩,有机质类型为Ⅲ型,处于过成熟演化阶段。根据莺山断陷深层天然气和烃源岩空间分布及地球化学特征,选择营城组、沙河子组、侏罗系丰度高的烃源岩样品,利用烃源岩吸附气轻烃指纹分析及特征参数表征深层各套烃源岩,通过化学模型和智能神经网络数学模拟方法建立烃源岩贡献模板,测试了深层3套烃源岩对每口井天然气的定量贡献,沙河子组烃源岩贡献大于50%,首次认识了莺山断陷深层天然气的定量来源及各套烃源岩的贡献。

本文引用格式

张博为, 张居和, 付广 . 松辽盆地莺山断陷深层天然气地球化学特征与各套烃源岩定量贡献[J]. 天然气地球科学, 2016 , 27(12) : 2185 -2192 . DOI: 10.11764/j.issn.1672-1926.2016.12.2185

Abstract

Based on the character of gas composition and isotope and light hydrocarbon fingerprint and source rock in Yingshan Fault Depression,gases in the Yingcheng Formation  and Shahezi Formation  are derived from a mixture of  humic and sapropellic  source rocks,and are at high-mature to over-mature thermal evolution stage.Shahezi Formation is a set of good-medium source rocks,and Yingcheng Formation  is a set of medium-good source rocks.The organic matter is dominated by type Ⅲ kerogen and followed by type Ⅰ and type Ⅱ.Jurassic is a set of good or non-poor source rocks,and the organic matter is type Ⅲ.It is at over-mature evolution stage.According to the gas geochemistry characteristic and source rock distribution feature in Yingshan Fault Depression,selecting source rock specimens in Yingcheng Formation ,Shahezi Formation  and Hushiling Formation  and according to the hydrocarbon fingerprint characteristic parameter of hydrocarbon source rocks,the calculating model uses mathematical simulation method to test the ration contribution and adjust per mouth of well of natural gas from three suits of hydrocarbon source rocks to analog computation.Results show,contribution of the Shahezi Formation  source rock is more than 50%.It is the first time to obtain natural gas ration source from and ration contribution of hydrocarbon source rocks in Yingshan Fault Depression.

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