胜利油田低渗透水驱油藏含水变化特征及影响因素

doi:10.11743/ogg20180420

石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (4): 833-838.doi: 10.11743/ogg20180420

胜利油田低渗透水驱油藏含水变化特征及影响因素

王建忠¹, 于新畅¹, 孙志刚², 李荣强¹, 徐进杰¹

1. 中国石油大学(华东) 石油工程学院, 山东青岛 266580;
2. 中国石化胜利油田分公司勘探开发研究院, 山东东营 257000

收稿日期:2017-04-05 修回日期:2018-06-07 出版日期:2018-08-28 发布日期:2018-07-23
第一作者简介:王建忠(1973-)男,博士,副教授,油气渗流理论和油气田开发技术。E-mail:wangjzh@upc.edu.cn。
基金项目:
国家自然科学基金项目（51490654）；国家科技重大专项（2016ZX05014-004-007）。

Characteristics and influential factors of water cut change in low permeability water-drive oil reservoirs in Shengli oilfield

Wang Jianzhong¹, Yu Xinchang¹, Sun Zhigang², Li Rongqiang¹, Xu Jinjie¹

1. School of Petroleum Engineering, China University of Petroleum(East China), Qingdao, Shandong 266580, China;
2. Exploration and Development Research Institute of Shengli Oilfeild Branch Co., Ltd., SINOPEC, Dongying, Shandong 257000, China

Received:2017-04-05 Revised:2018-06-07 Online:2018-08-28 Published:2018-07-23

摘要/Abstract

摘要： 生产中含水率的变化特征在一定程度上可以反映水驱油效果的好坏。见水早、含水上升快、水驱油效率低等问题一直困扰着低渗透油藏开发。水驱油藏含水率的变化问题属于岩石中油水两相渗流的范畴，含水变化特征必然决定于岩石物性、油水特征和驱动力等因素。针对胜利油田低渗透水驱油藏，通过大量实验数据分析了储层孔隙结构特征、原始含水饱和度、应力敏感性和驱替压力等因素对含水率变化和水驱油效率的影响。研究发现孔隙的连通性是影响含水上升规律的重要因素，而初始含水率主要是由原始含水饱和度决定，适当的控制驱替压力有利于控制含水率，提高水驱油效率。考虑到低渗透储层渗透率的应力敏感性，建议实施超前注水，避免压力下降造成的渗透率伤害，从而利于提高水驱油效率。

关键词: 含水率, 水驱油效率, 应力敏感, 低渗透油藏, 水驱油藏, 渤海湾盆地

Abstract: The characteristic change of water cut can reflect the effectiveness of waterflooding to some extent.Early water breakthrough,fast water cut rise,and low efficiency of waterflooding have always been the obstacles preventing the development of low permeability reservoirs.Variation of water cut in waterflooding oil reservoirs involves two-phase flow of oil and water in rocks,thus is controlled by petrophysical property,oil-water features and driving force.In regard to the low permeability water-drive oil reservoirs in Shengli oilfield,we analyzed the factors influencing the variation of water cut and waterflood efficiency based on larges amounts of experimental data.These factors are characteristics of reservoir pore structure,original water saturation,stress sensitivity and displacement pressure.The results show that pore connectivity is the major factor for water cut rising,while the initial water cut mainly depends on original water saturation.Appropriate control on displacement pressure is beneficial for controlling water cut and increasing waterflood efficiency.Considering the stress sensitivity of permeability in low permeability reservoirs,we suggested the implementation of advanced water injection to avoid the permeability damage caused by pressure drop,so as to improve waterflood efficiency.

Key words: water cut, waterflood efficiency, stress sensitivity, low permeability reservoir, water-drive oil reservoir, Bohai Bay Basin

中图分类号:

TE348

王建忠,于新畅,孙志刚,等. 胜利油田低渗透水驱油藏含水变化特征及影响因素[J]. 石油与天然气地质, 2018, 39(4): 833-838. doi: 10.11743/ogg20180420 Wang Jianzhong,Yu Xinchang,Sun Zhigang,et al. Characteristics and influential factors of water cut change in low permeability water-drive oil reservoirs in Shengli oilfield[J]. Oil & Gas Geology, 2018, 39(4): 833-838. doi: 10.11743/ogg20180420

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胜利油田低渗透水驱油藏含水变化特征及影响因素

Characteristics and influential factors of water cut change in low permeability water-drive oil reservoirs in Shengli oilfield

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