西南石油大学学报(自然科学版) ›› 2000, Vol. 22 ›› Issue (2): 11-14.DOI: 10.3863/j.issn.1000-2634.2000.02.04

• 石油工程 • 上一篇    下一篇

蒸汽驱对储层孔隙结构和矿物组成的影响

唐洪明1 赵敬松1 陈忠1 沈明道1 柴利文2 唐清山2   

  1. 1.西南石油学院勘探系,四川 南充 637001; 2.辽河油田高升采油厂
  • 收稿日期:1999-11-12 修回日期:1900-01-01 出版日期:2000-04-20 发布日期:2000-04-20

THE EFFECT OF STEAM FLOODINGON PORESTRUCTURE AND RESERVOIR MINERALS

TANG Hong-ming1 ZHAO Jing-song1 CHEN Zhong1 SHEN Ming-dao1 CAI Li-wen2 TANG Qing-shan2   

  1. Southwest Petroleum Inst
  • Received:1999-11-12 Revised:1900-01-01 Online:2000-04-20 Published:2000-04-20

摘要:

以辽河高升油田莲花油层,通过室内模拟实验和矿场岩心分析了蒸汽驱对储层孔隙结构和矿物组成的影响。研究表明蒸汽驱导致储层孔隙度、孔隙直径增大,喉道半径、渗透率减小,增强了孔喉分布的非均质性,蒸汽对粘土矿物的微结构有强烈的破坏力。同时,室内实验表明蒸汽驱过程中,250℃时有蒙脱石、沸石等矿物产生,但由于稠油对蒙脱石等细小的微粒有较强的携带能力,最终导致储层中蒙脱石的含量降低。微粒运移和蒙脱石的膨胀为蒸汽驱过程中储层伤害的主要原因。

关键词: 蒸汽驱, 岩性物性参数, 孔隙结构, 粘土矿物, 储集层

Abstract:

This paper shows the effect of steam flooding on pore structure and reservoir minerals in Lian-hua reservoir of Liaohe Gaosheng oil field based on lab simulation and core analysis.The pore structure of reservoir media are studied to compare with heat simulation experiments. Steam flooding will lead to the increase of porosity and pore diameter, and the decrease of pore throat and permeability. Thus, the heterogeneity of pore structure becomes more serious .Steam has strong effect on the microstructure of the clay minerals . The experimental tests prove that new minerals, such as smectite and zeolite, will be formed at 250℃. However, the heavy oil can easily carry fine particles(<4μm) ,and finally the content of smectite in reservoir will decline .The main factors of formation damage during the steam flooding are particle migration and swell of smectite.

Key words: Steam flooding, Petrophysical parameters, Pore structure, Clay mineral, Reservoir

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