天然气地质学

辽河西部凹陷雷家地区沙四段油气资源结构特征

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  • 中国石油勘探开发研究院,北京 100083
汪少勇(1988-),男,湖北天门人,博士,主要从事常规-非常规油气资源评价研究. E-mail:wsy19880129@163.com.

收稿日期: 2016-04-10

  修回日期: 2016-06-05

  网络出版日期: 2019-09-11

基金资助

中国石油天然气股份有限公司重大专项“油气资源评价_中国石油第四次油气资源评价”(编号:2013E-0502)资助.

Resource framework of the 4th member of Shahejie Formation,Leijia district,Liaohe Western Depression

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  • Research Institute of Petroleum Exploration & Development,Beijing 100083,China

Received date: 2016-04-10

  Revised date: 2016-06-05

  Online published: 2019-09-11

摘要

油气资源结构是指不同类型油气资源量的大小及空间配置关系,其研究结果能为勘探决策提供重要支撑。辽河西部凹陷中北部雷家地区沙河街组四段发育优质烃源岩和多种类型储层,形成常规、非常规石油协同发育,低熟、成熟石油混合聚集特征。在成藏要素综合分析的基础上,研究了雷家地区沙四段常规油、致密油、页岩油空间分布特征。结合盆地模拟法、小面元容积法、EUR分布类比法、体积法估算雷家地区沙四段生烃量、排烃量、滞留量和聚集量,详细研究了沙四段资源定量组成及分布特征,建立沙四段油气资源结构模型。结果表明,雷家地区沙四段以生油为主,页岩油分布在洼陷中心,致密油环绕页岩油分布,常规油聚集在页岩油和致密油分布区外围。缓坡带_洼陷带_陡坡带剖面上,依次分布低熟稠油、低熟_成熟混源致密油、成熟页岩油和成熟常规油。沙四段烃源岩总生油量为12.9×108t,总的石油地质资源量为10.45×108t。其中,页岩油地质资源量为7.51×108t,占比71.9%;致密油地质资源量为2.25×108t,占比21.5%;常规油地质资源量为0.69×108t,占比6.6%。页岩油、致密油、常规油地质资源量的比例约为11∶3∶1。

本文引用格式

汪少勇, 李建忠, 王社教, 郑民, 吴晓智 . 辽河西部凹陷雷家地区沙四段油气资源结构特征[J]. 天然气地球科学, 2016 , 27(9) : 1728 -1741 . DOI: 10.11764/j.issn.1672-1926.2016.09.1728

Abstract

The resource framework includes spatial distribution and resource volume of different hydrocarbon types.It can provide vital support for the exploration decision.The 4th member of Shahejie Formation (Es4) in Leijia district of Liaohe Western Depression,which is under the salty chemical Lake Bay environment,developed excellent shale source rock and different reservoir types.Mixed immature and mature oil,with conventional and unconventional types,can be explored in this area.Based on integrated analysis of source rock and reservoir,spatial distribution of conventional viscous crude oil,normal crude oil,tight oil and shale oil was studied.Multiple methods including basin simulation,small cell element volumetric method,EUR distribution analogism method and probabilistic volume method were employed to quantitatively estimate the volumes of hydrocarbon generation,expulsion and accumulation.By detailed research on quantitative composition and resource distribution of Es4,the resource framework of Es4 was established.The results show that tight oil occurs around the center of hydrocarbon generation pool,while the low mature viscous oil accumulates in the gentle slope belt and conventional oil enriched in steep slope.On the profiles,along gentle slope belt,depression center and steep slope,low mature viscous oil,mixed tight oil,mature shale oil and conventional normal oil were distributed.The total hydrocarbon generating quantity in Es4 is 1.29 billion tons,and the total geological resources volume is 1.045 billion tons.Among them,the in-place resource volume of shale oil,tight oil and conventional oil is 0.751 (with a ratio of 71.9%),0.225 (with a ratio of 21.5%) and 0.069 (with a ratio of 6.6%) billion tons,respectively.The resource size ratio is 11∶3∶ 1.

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