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[1]马奎前 蔡 晖 孙召勃.基于核磁共振的驱替速度和倍数对疏松砂岩油藏孔喉特征及采收率影响实验[J].中国海上油气,2019,31(06):86-91.[doi:10.11935/j.issn.1673-1506.2019.06.010]
 MA Kuiqian CAI Hui SUN Zhaobo.Nuclear magnetic resonance-based experiment on the effects of displacement velocity and multiple on the pore throat characteristics and recovery factorof unconsolidated sandstone reservoirs[J].China Offshore Oil and Gas,2019,31(06):86-91.[doi:10.11935/j.issn.1673-1506.2019.06.010]
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基于核磁共振的驱替速度和倍数对疏松砂岩油藏孔喉特征及采收率影响实验()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第31卷
期数:
2019年06期
页码:
86-91
栏目:
渤海海域油气勘探开发成果专辑
出版日期:
2019-11-21

文章信息/Info

Title:
Nuclear magnetic resonance-based experiment on the effects of displacement velocity and multiple on the pore throat characteristics and recovery factor of unconsolidated sandstone reservoirs
文章编号:
1673-1506(2019)06-0086-06
作者:
马奎前 蔡 晖 孙召勃
(中海石油中国(有限)公司天津分公司 天津 300459)
Author(s):
MA Kuiqian CAI Hui SUN Zhaobo
(CNOOC China Limited, Tianjin Branch, Tianjin 300459, China)
关键词:
核磁共振 孔喉半径 驱替速度 特高驱替倍数 海上疏松砂岩油藏
Keywords:
nuclear magnetic resonance pore throat radius displacement velocity extra-high flooding multiple offshore unconsolidated sandstone reservoir
分类号:
TE343
DOI:
10.11935/j.issn.1673-1506.2019.06.010
文献标志码:
A
摘要:
疏松砂岩油藏在长期注水开发过程中储层的孔喉结构发生变化,影响开发效果。基于核磁共振扫描岩心技术并借助室内驱油实验,研究了不同驱替速度和特高驱替倍数对渤海SZ油田疏松砂岩油藏孔喉特征及采收率的影响。结果表明:固定特高驱替倍数(2 000 PV)下,驱替速度越大,孔喉扩大倍数越大; 当驱替速度由0.5 mL/min增大到1.5 mL/min后,孔喉扩大倍数由2.68增加到3.18; 驱替倍数<500 PV时,驱替速度越高,阶段采收率越高; 驱替倍数>500 PV后,随驱替速度增加,最终采收率有所降低; 固定驱替速度(1 mL/min),驱替倍数由2 000 PV增加至3 000 PV时,采收率仅增加1.59个百分点,且在采出液中出现较明显的固体颗粒。对于渤海SZ油田而言,注水开发后期(>500 PV)驱替速度不宜过大,同时驱替倍数达到2 000 PV后继续注水对提高采收率效果不明显。本文研究可为该类油藏开发方案设计提供借鉴和指导。
Abstract:
The pore-throat structure of unconsolidated sandstone reservoirs is subjected to a change during long-term water injection development, which affects the development effect obviously. Based on the nuclear magnetic resonance core scanning technology and the indoor oil displacement experiment, the effects of different displacement velocities and ultra-high displacement multiples on the pore throat characteristics and recovery factor of the unconsolidated sandstone reservoirs in the Bohai SZ oilfield have been studied. The results show that under the fixed ultra-high displacement multiple(2 000 PV), the higher the displacement velocity, the larger the expansion factor of pore throat will be. When the displacement velocity is increased from 0.5 mL/min to 1.5 mL/min, the pore throat expansion factor is increased from 2.68 to 3.18; when the displacement multiple is <500 PV, the higher the displacement velocity, the higher the staged recovery factor will be. Once the displacement multiple is >500 PV, the ultimate recovery factor decreases with the displacement velocity. For the fixed displacement velocity(1 mL/min), when the displacement multiple is increased from 2 000 PV to 3 000 PV, the recovery factor is only increased by 1.59%, and more visible solid particles are observed in the produced liquid. For the Bohai SZ oilfield, the displacement velocity in the late period of water injection development(>500 PV)should not be too large, and after the displacement multiple reaches 2 000 PV, the effect of continuous water flooding is not obvious. This study can provide reference and guidance for designing the development scheme of similar reservoirs.

参考文献/References:

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备注/Memo

备注/Memo:
*“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范(编号:2016ZX05058-001)”、中海石油(中国)有限公司综合科研项目“渤海‘双高'油田挖潜关键技术研究(编号:YXKY-2018-TJ-04)”部分研究成果。 第一作者简介: 马奎前,男,教授级高级工程师,主要从事海上油气田开发与研究工作。地址:天津市滨海新区海川路2121号渤海石油管理局大厦B座(邮编:300459)。E-mail:makq@cnooc.com.cn。
更新日期/Last Update: 1900-01-01