鄯善油田提压注水试验应用效果评价  

Evaluation Application Effect of Water Flooding Experiment by Increasing Pressure in Shanshan Oilfield

作　　者：马鸿来 吴红果 郭伟峰 房育金 杨永霞 袁玉英 

机构地区：[1]中国石油吐哈油田分公司鄯善采油厂,新疆鄯善838202

出　　处：《吐哈油气》2007年第3期250-253,共4页Tuha Oil & Gas

摘　　要：低渗油藏的主要特征是具有小孔隙、细喉道、高渗流阻力和低吸水能力。油井产油能力和吸水能力都非常低。流体在地层中的流动受毛管力、贾敏效应等因素影响,注水井大多启动压差大,要求注水压力高,注水难以达到配注要求。在低渗油田注水开发过程中,存在许多欠注井,常规的酸化、压裂增注的效果不明显。特别是Ⅱ、Ⅲ类储层压力扩散困难,不能建立有效的压力驱替梯度。为了增加驱动压力梯度,提高Ⅱ、Ⅲ类层的吸水强度,提高储量动用程度,制定并实施了微超压注水的技术对策(即提压注水)试验,经过一期和二期提压注水,收到了很好的效果。The main characteristics of low permeability reservoir are small reservoir pore, fine throat, high seepage resistance and low water intake capacity. Deliverability and water intake capacity of oil well are very low. The fluid flow in formation is influenced by capillary force and Jamin action, so threshold differential pressure is high in most water flooding well, which needs high water flooding pressure, it＇s hard to meet the requirement of water injection allocation. During water- flooding the low permeability oilfield, there are many insufficient water injection wells, the effect of conventional acidizing, fracturing and increasing flooding is not noticeable. In particular, pressure diffusion is so difficult in Ⅱ and Ⅲtype of reservoir that effective driving pressure gradient is very hard to build. In order to increase driving pressure gradient, improve water intake capacity of Ⅱ and Ⅲ reservoir and boost the producing degree of the reserve, overpressure water flooding technical countermeasure experiment is worked out and implemented. After the first and the second water injection by increasing pressure, good effect has been obtained.

关 键 词：提压注水 低渗透 油田开发 鄯善油田 

分 类 号：TE357.62[石油与天然气工程—油气田开发工程]