西南石油大学学报(自然科学版)

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致密砂岩油藏流体赋存特征及有效动用研究

杨正明*,骆雨田,何英,郭和坤,赵玉集   

  1. 中国石油勘探开发研究院廊坊分院渗流所,河北廊坊065007
  • 出版日期:2015-06-01 发布日期:2015-06-01
  • 通讯作者: 杨正明,E-mail:yzhm69@petrochina.com.cn
  • 基金资助:

    国家科技重大专项(2011ZX05013 006);中国石油重点科技攻关项目(2011 13)。

Study on Occurrence Feature of Fluid and Effective Development in
Tight Sandstone Oil Reservoir

Yang Zhengming*, Luo Yutian, He Ying, Guo Hekun, Zhao Yuji   

  1. Langfang Branch,Petrochina Research Institute of Petroleum Exploration & Development,Langfang,Hebei 065007,China
  • Online:2015-06-01 Published:2015-06-01

摘要:

利用核磁共振和离心仪,研究了不同渗透率致密岩芯流体的赋存特征。研究表明:致密油藏流体可流动的喉
道半径下限值为0.05 µm;岩芯中纳米级喉道所控制的流体百分数随着岩芯渗透率降低而急剧上升,而纳米级喉道所
控制的可动流体体积随渗透率的减小呈逐渐增加趋势;微米级喉道所控制的流体和可动流体百分数随岩芯渗透率降
低而急剧下降,亚微米级喉道所控制的流体和可动流体百分数随岩芯渗透率降低而先增加后减小,呈抛物线变化趋
势。在此基础上,利用油藏数值模拟方法,通过研究分段压裂水平井不同井型组合不同开采方式对致密油藏有效动用
的影响,得到分段压裂水平井采用注CO2 补充能量开发效果最好,采用注水补充能量开发效果一般,衰竭开采的效果
最差。

关键词: 致密油藏, 可动流体, 赋存, 有效动用, 分段压裂水平井

Abstract:

The occurrence feature of fluid in tight oil cores with different permeability was studied using nuclear magnetic
resonance(NMR)and centrifuge. The results indicate that the low limit of throat radius for movable fluid in tight oil reservoir
is 0.05 µm;the fluid percentage controlled by the nanometer throat radius rise;sharply as permeability decreases,the movable
fluid percentage controlled by the nanometer throat radius rises gradually as permeability decrease,the fluid and movable fluid
percentage which was controlled by the micron throat radius was a sharp drop as permeability decreases;the fluid and movable
fluid percentage controlled by the submicron throat radius first increases and then decreases as permeability decreases. Based
on the above findings,the effect of different wells combinations and different development scheme on effective development
was studied with reservoir numerical simulation technique. The results reveal that development effect of CO2 injection for
replenishing energy in staged fracturing horizontal wells is the best,and water injection takes second place,while depletion
gets the worst effect.

Key words: tight oil reservoir, movable fluid, occurrence, effective development, staged-fracturing horizontal well