安塞油田注水开发技术研究  

Study on the Techniques for Waterflooding in Ansai Oilfield

作　　者：金拴联[1] 蒋远征[1] 杨秋莲[1] 孙艳妮[1] 曲春霞[1] 李克永[2] 

机构地区：[1]长庆油田勘探开发研究院,陕西西安710021 [2]西北大学地质学系,陕西西安710069

出　　处：《西北地质》2008年第1期115-120,共6页Northwestern Geology

摘　　要：安塞油田特低渗透油藏的非均质性较强,注水开发启动压力梯度大、天然微裂缝较发育和油井见水后采液、采油指数下降等因素对注水开发效果的影响日益突出,根据安塞油田多年实际注水开发试验,从注水参数优化、精细注水单元划分、注水剖面调整和优化注采井网方面分析总结了安塞油田注水开发的基本方法和基本特点,在注水参数优化方面提出了超前注水及油井投产的时机选择,以及强化注水、不稳定注水的特点和方法,针对油层的非均质性提出了三分精细注水的核心和方法,对剖面调整技术和井网优化技术的实际应用效果进行了分析评价。为油田开发提供了技术借鉴和指导。The characteristics of Ansai extra low permeability oil filed are the strong heterogeneity of reservoirs, the big starting pressure difference and driving pressure gradient, the natural fracture development and the declining productivity index after water breakthrough. These factors are showing increasing negative effects on waterflooding in Ansai oil field. Based on the years of experiments that have been perfomed in Ansai oil field, the optimization of the water-injection parameters, the classification of fine water-injection units, the modification of water-injection profile and the optimization of the injectionproduction pattern were performed. Basic methods and main features of the exploration of Ansai Oilfield were concluded; the timing of advancing waterflooding and well startup were proposed; the methods and features of enhanced water injection and unstable waterflooding was reached; the key mothod of triplicate fine waterflooding as a countermeasure for reservoir heterogeneity was brought forward; the practical application of section adjusting and well net pattern optimization was analyzed and evaluated. , The results may provide referential technical experience and guidance to future oil field exploration.

关 键 词：安塞油田 超前注水 注水参数 注水剖面 注水单元 

分 类 号：P618.13[天文地球—矿床学]