石油与天然气地质 ›› 2019, Vol. 40 ›› Issue (3): 459-468.doi: 10.11743/ogg20190302

• 油气地质 • 上一篇    下一篇

页岩油的资源潜力及流动性评价方法——以西加拿大盆地上泥盆统Duvernay页岩为例

谌卓恒1, 黎茂稳2, 姜春庆1, 钱门辉2   

  1. 1. 加拿大联邦地质调查局, 阿尔伯塔, 卡尔加里 T2L2A7;
    2. 中国石化 石油勘探开发研究院, 北京 100083
  • 收稿日期:2019-01-01 修回日期:2019-03-18 出版日期:2019-06-28 发布日期:2019-04-26
  • 作者简介:谌卓恒(1955-),男,博士、加拿大联邦地质调查局研究员,石油资源评价。E-mail:zhuoheng@canada.ca。
  • 基金资助:
    Geoscience for new energy supply;Program of energy research&development.

Shale oil resource potential and its mobility assessment: A case study of Upper Devonian Duvernay shale in Western Canada Sedimentary Basin

Chen Zhuoheng1, Li Maowen2, Jiang Chunqing1, Qian Menhui2   

  1. 1. Geological Survey of Canada, Calgary, Alberta, Canada, T2L2A7;
    2. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China
  • Received:2019-01-01 Revised:2019-03-18 Online:2019-06-28 Published:2019-04-26

摘要: 页岩油储层集生储盖为一体,具双孔结构,以纳米孔隙为主,储层中油气的流动性是资源商业成功开发的关键地质因素之一。基于常规储层体积法的页岩油资源评价方法受制于单一基质孔隙结构模型,无法依油气在储层中的赋存状态分类评价,不能为资源开发决策提供与油气流动性相关的信息。页岩油的赋存状态主要受烃源岩成熟度和类型控制。Rock-Eval热解数据含大量与烃源岩类型和成熟度相关信息,结合已知页岩油田的生产数据,我们提出根据页岩油赋存状态的分类评价,并在此基础上将油气资源划分为不可动(吸附),受限和可动三种资源类型,以此定量描述页岩油气资源的流动性。文章以加拿大西部盆地上泥盆统Duvernay页岩油田的生产和储层资料为基础,建立资源评价所需页岩油藏参数与热解参数之间的经验模型,采用石油地层体积因子恢复热解样品取样过程中的轻烃损失,并以8-32-46-9W5井Duvernay页岩油气资源单井评价为例,介绍方法的基本原理及其应用。以该井为中心的区块单元内资源量评价结果经10%的采收率折扣后,与邻区按实际生产数据用产量递减方法计算出的结果一致。说明本文提出的基于热解数据和生烃动力学模型的页岩油资源评价方法可行。

关键词: 资源评价, 赋存状态, 可动性, 热解数据, 轻烃损失校正, 页岩油, Duvernay页岩, 西加拿大盆地

Abstract: Shale oil reservoir is a source-reservoir-caprock integration characterized by dual-porosity with nano-pores being dominant.Oil mobility in the reservoir is one of the key geological factors for the commercial resource development with success.Shale oil resource evaluation method based on conventional reservoir volumetric approach is subject to the pore structure of simple matrix and not applicable to assess the resources according to their states of occurrence in reservoir.As such it cannot provide adequate information with respect to oil and gas mobility for making resource development decisions.The state of occurrence of shale oil and gas is primarily controlled by the maturity and types of source rocks,and Rock-Eval pyrolysis data contain critical information related to source rock types and maturity.According to the states of oil occurrence in shale reservoir,the oil and gas resources are divided into three categories:non-movable (adsorbed),restricted,and movable resources,to quantitatively describe the mobility of oil and gas in shale reservoir.Combined with the production and reservoir data from the Upper Devonian Duvernay shale oil field in the Western Canada Sedimentary Basin,empirical models are established for assessing resources in terms of shale oil reservoir parameters and pyrolysis data,and then oil formation volume factor is used to estimate the evaporative loss of light hydrocarbons for pyrolysis parameter (S1)during coring and sampling.A single well evaluation of Duvernay shale oil and gas resource potential in Well 8-32-46-9W5 is taken as an example to introduce the principles and demonstrate the application of the proposed method in shale oil resource assessment.The resource potential of the block with Well 8-32-46-9W5 as its core calculated by this method and with 10% recovery discounted,is consistent with the result derived from production decline model based on actual production data in adjacent areas,which demonstrates that the shale oil resource assessment method proposed here based on pyrolysis data and hydrocarbon generation kinetics model is feasible.

Key words: resource assessment, state of occurrence, mobility, Rock-Eval pyrolysis data, correction of light hydrocarbon loss, shale oil, Duvernay shale, Western Canada Sedimentary Basin

中图分类号: