石油勘探与开发 >

2019 , Vol. 46 >Issue 4: 739 - 745

DOI: https://doi.org/10.11698/PED.2019.04.12

油气田开发

致密储集层渗吸影响因素分析与渗吸作用效果评价

  • 杨正明 ,
  • 刘学伟 ,
  • 李海波 ,
  • 雷启鸿 ,
  • 骆雨田 ,
  • 王向阳
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  • 1. 中国石油勘探开发研究院,北京 100083;
    2. 中国科学院渗流流体力学研究所,河北廊坊 065007;
    3. 中国石油长庆油田公司勘探开发研究院,西安 710018
杨正明（1969-）,男,江苏盐城人,博士,中国石油勘探开发研究院教授级高级工程师,主要从事低渗/致密油气田物理模拟、渗流理论和三次采油方面的研究工作。地址：河北省廊坊市44#,中国石油勘探开发研究院渗流流体力学研究所,邮政编码：065007。E-mail: yzhm69@petrochina.com.cn

收稿日期: 2018-06-04

  修回日期: 2019-02-19

  网络出版日期: 2019-07-17

基金资助

国家科技重大专项“超低渗油藏物理模拟方法与渗流机理”（2017ZX05013-001）; 中国石油天然气集团有限公司重大基础科技攻关课题“致密油藏物理模拟方法与开采机理研究”（2018B-4907）

收起

Analysis on the influencing factors of imbibition and the effect evaluation of imbibition in tight reservoirs

  • YANG Zhengming ,
  • LIU Xuewei ,
  • LI Haibo ,
  • LEI Qihong ,
  • LUO Yutian ,
  • WANG Xiangyang
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  • 1. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;
    2. Institute of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China;
    3. Exploration and Development Research Institute of Changqing Oilfield Company, PetroChina, Xi’an 710018, China;

Received date: 2018-06-04

  Revised date: 2019-02-19

  Online published: 2019-07-17

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摘要

为了探索如何有效发挥裂缝与基质之间的渗吸作用、提高致密储集层开发效果,采用高压大模型物理模拟系统和核磁共振等技术,建立了不同尺度岩心渗吸物理模拟实验方法,研究了致密储集层渗吸过程的影响因素,并构建了水驱油时渗吸作用的定量评价方法。研究表明：逆向渗吸过程中,渗透率越低,油滴析出越晚,渗吸平衡时间越长,采出程度越低;裂缝可有效扩大致密基质与水接触的渗吸面积和渗吸前缘的范围,减小油排出的阻力,提高渗吸速度和采出程度;岩石越亲水,岩样的渗吸速度和采出程度越高。顺向渗吸过程中,渗透率越低,渗吸作用越明显;驱替采出程度与渗透率呈正相关,而渗吸采出程度与渗透率呈负相关。注水吞吐的渗吸距离要大于单纯的逆向渗吸距离,渗透率和注入倍数越大,渗吸距离越大。致密储集层大规模体积压裂与改变储集层润湿性、注水吞吐相结合有利于提高致密储集层的渗吸效果。图9表2参23

关键词： 致密储集层; 物理模拟; 核磁共振; 渗吸作用; 影响因素; 作用距离

本文引用格式

杨正明 , 刘学伟 , 李海波 , 雷启鸿 , 骆雨田 , 王向阳 . 致密储集层渗吸影响因素分析与渗吸作用效果评价[J]. 石油勘探与开发, 2019 , 46(4) : 739 -745 . DOI: 10.11698/PED.2019.04.12

Abstract

To exert the imbibition between cracks and matrix effectively and enhance the development effect of tight oil reservoirs, a physical simulation method for imbibition in different scales of cores is developed by combining a high-pressure large-model physical simulation system and nuclear magnetic resonance technology (NMR) to investigate the influencing factors of imbibition process in tight reservoirs, and construct a quantitative evaluation method for the imbibition in water flooding. The results show that in the process of counter-current imbibition, the lower the permeability, the later the oil droplet precipitation, the longer the imbibition equilibrium time, and the lower the recovery degree. Fractures can effectively expand the area of imbibition and the front edge of imbibition in the contact between the dense matrix and water, reduce the resistance of oil discharge, and improve the imbibition speed and the degree of recovery. The more hydrophilic the rock, the higher the imbibition rate and imbibition recovery of tight rocks. In the process of co-current imbibition, the lower the permeability, the more obvious the imbibition, and the displacement recovery is positively correlated with permeability, while the imbibition recovery is negatively correlated with the permeability. It also shows that the imbibition distance of the cyclic water injection is greater than that of the counter-current imbibition, and the higher the permeability and the injection multiple, the longer the imbibition distance. The combination of large-scale volume fracturing with changing reservoir wettability and cyclic water injection is conducive to improving the imbibition ability of tight reservoirs.

Key words： tight reservoir; physical simulation; nuclear magnetic resonance; imbibition; influencing factor; imbibition distance

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