[1]孙藏军,黄建廷,别旭伟,等.A构造低渗砂砾岩微观孔喉结构及对物性和产能的影响[J].复杂油气藏,2020,13(04):63-68.[doi:10.16181/j.cnki.fzyqc.2020.04.012]
 SUN Cangjun,HUANG Jianting,BIE Xuwei,et al.Micropore throat structure of low-permeability glutenite reservoir in structure A and its influence on physical properties and productivity[J].Complex Hydrocarbon Reservoirs,2020,13(04):63-68.[doi:10.16181/j.cnki.fzyqc.2020.04.012]
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A构造低渗砂砾岩微观孔喉结构及对物性和产能的影响()
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《复杂油气藏》[ISSN:1674-4667/CN:31-2019/TQ]

卷:
13卷
期数:
2020年04期
页码:
63-68
栏目:
油气开发
出版日期:
2020-12-25

文章信息/Info

Title:
Micropore throat structure of low-permeability glutenite reservoir in structure A and its influence on physical properties and productivity
作者:
孙藏军黄建廷 别旭伟姜 永常 涛
中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459
Author(s):
SUN Cangjun HUANG JiantingBIE Xuwei JIANG Yong CHANG Tao
Bohai Petroleum Institute of Tianjin Branch of CNOOC Ltd., Tianjin 300459, China
关键词:
恒速压汞特低渗—低渗砂砾岩孔店组A构造
Keywords:
constant velocity mercury injectionultra-low permeability glutenite Kongdian Formation structure A
分类号:
TE348
DOI:
10.16181/j.cnki.fzyqc.2020.04.012
文献标志码:
A
摘要:
为了认识A构造孔店组砂砾岩储层的微观孔喉结构特征,定量表征其对储层物性和产能的影响,利用恒速压汞资料,结合铸体薄片、扫描电镜、物性等分析化验和DST测试资料,对其微观孔喉分布特征、进汞曲线特征以及不同尺度孔喉对储层物性的贡献等进行分析,探讨孔喉结构对产能的影响。结果表明,研究区发育低孔低渗粗—中喉型、特低孔低渗中喉型和特低孔特低渗细—微细喉型三类孔喉结构。与常规致密砂岩不同,研究区孔店组砂砾岩储层孔隙和喉道分布形态和集中程度均差异大。渗透率越好,喉道分布越均匀且偏粗—中喉分布频率越大,孔喉半径比越小,分布范围越集中且峰值频率越高,越有利于渗流。喉道大小和分布是控制特低渗—低渗砂砾岩储层物性的关键参数,尤其体现在对渗透率的影响。渗透率受控于占喉道体积分数33.3%左右的相对大喉道。孔喉结构越好,储层品质指数RQI值越大,测试日产气量越高。
Abstract:
In order to understand the characteristics of the microscopic pore-throat structure of Kongdian Formation glutenite reservoir in structure A,and quantitatively characterize its impact on the physical properties and productivity of the reservoir,using the constant velocity mercury injection data, combined with cast thin sections,scanning electron microscope,physical properties and DST test data,it was analyzed the distribution characteristics of micropore pore-throat,the characteristics of mercury inflow curve and the contribution of different scale pore throats to the reservoir physical properties,and discussed the influence of pore throat structure on productivity.The results show that the study area developed three types of pore-throat structures:low-porosity and low-permeability coarse-medium throat,ultra-low-porosity and low-permeability middle throat,and ultra-low-porosity and ultra-low permeability fine-subtle throat. Different from conventional tight sandstones, the pores and throats of the Kongdian Formation glutenite reservoirs in the study area are very different in distribution and concentration.The better the permeability,the more uniform the throat distribution,and the larger the coarse-medium throat distribution frequency,the smaller the pore-throat radius ratio,the more concentrated the distribution range and the higher the peak frequency,the more favorable to the seepage.The throat size and distribution are key parameters for controlling the physical properties of ultra-low and low permeability glutenite reservoirs, especially in their influence on permeability.The permeability is controlled by the relatively large throat which accounts for about 33.3% of the throat volume fraction. The better the pore throat structure is, the greater the RQI value of reservoir quality index,and the higher the daily gas production in the test.

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备注/Memo

备注/Memo:
收稿日期:2020-04-07 ;改回日期:2020-05-24。
第一作者简介:孙藏军(1988—),硕士,工程师,现主要从事海上油气田开发地质研究工作。E-mail:suncj2@cnooc.com.cn。
基金项目:国家科技重大专项“渤海海域勘探新领域及关键技术研究”(2016ZX05024-003)。
更新日期/Last Update: 2020-12-31