川西气田气—泡沫—水三相上升管流流型实验研究

发布时间：2018-04-14 21:37

本文选题：川西气田 + 气-泡沫-水　；参考：《西南石油大学》2017年硕士论文

【摘要】：川西气田属于低渗致密气藏,气井普遍产水,主要采用泡沫排水采气,但部分井泡沫排水效果不理想,有的井随日产气量、日产水量波动泡排效果时好时坏,其实质是泡排井井筒中气-泡沫-水三相流动形态不清楚,不能获得泡排有效举升的气井生产参数合理范围。为此本文主要开展了如下工作:(1)统计了川西气田37 口井泡排前、后生产数据,利用泡排产水量上升率和油套压差下降率两个指标分别分析了气量、水量、气水比对泡排效果的影响规律。(2)利用DunsRos无因次速度准数为相似准数,确定了实验参数范围,设计并建立了一套内径50mm、高4m的可视化模拟实验装置,为气-泡沫-水三相上升管流流型实验提供实验手段。(3)对UT-11C、SP-7起泡剂进行了起泡剂类型、浓度对比实验,在此基础上进行了 360组气、水正交泡沫流型实验,采用高速摄像结合压差分析的流型识别方法,归纳总结了 4种泡沫流型,并分析了各流型泡排特征。(4)利用实验数据分析了工程常用气液流型图误差,以Aziz流型图为基础修正得到了 4条泡沫流型边界线,结合MapInfo软件绘制的泡排产水量上升率云图,得到了气-泡沫-水三相上升管流流型图。(5)以川西27 口井泡排前、后生产数据为基础,对气-泡沫-水三相流型图进行了典型井验证和普遍性验证,准确率90%以上;并以川孝633井为例,采用气-泡沫-水流型图进行了井筒剖面泡沫流型预测及泡排产水量上升率预测,并推荐了泡排工艺制度。本文研究成果为川西气田泡沫排水采气工艺的设计提供了重要的技术支持,对泡沫管流理论研究也有一定的参考价值。
[Abstract]:Western Sichuan gas field belongs to low permeability gas reservoir, gas wells generally produce water, mainly using foam drainage to produce gas, but some wells are not ideal foam drainage effect, some wells with daily gas production, daily water production fluctuation bubble discharge effect is good and bad.The essence is that the gas-foam-water three-phase flow pattern is not clear and the reasonable range of production parameters can not be obtained.For this reason, this paper mainly carried out the following work: 1) the production data of 37 wells in West Sichuan gas field before and after bubble row were counted, and the gas volume and water quantity were analyzed by using the rising rate of bubble discharge water production and the drop rate of oil casing pressure difference.The effect of air-water ratio on bubble discharge effect. (2) using DunsRos dimensionless velocity criterion as similar criterion, the range of experimental parameters is determined, and a set of visual simulation experiment equipment with 50mm inner diameter and 4m high is designed and built.This paper provides an experimental method for the experiment of gas-foam-water three-phase upward pipe flow pattern. (3) the type of foaming agent and the concentration contrast experiment of UT-11CfSP-7 foaming agent are carried out. On the basis of this, 360 groups of gas and water orthogonal foam flow pattern experiments are carried out.In this paper, four kinds of foam flow patterns are summed up by using the method of high speed camera and differential pressure analysis, and the bubble row characteristics of each flow pattern are analyzed. (4) the error of gas-liquid flow pattern diagram in common engineering is analyzed by using experimental data.Based on the Aziz flow pattern diagram, four boundary lines of foam flow pattern are obtained. Combined with the cloud map of rising water production rate of bubble discharge produced by MapInfo software, the flow pattern diagram of gas-foam-water three-phase ascending pipe flow pattern is obtained.Based on the post-production data, the typical well verification and universal verification of gas-foam-water three-phase flow pattern are carried out, the accuracy is over 90%, and the Chuanxiao 633 well is taken as an example.The bubble flow pattern and the rising rate of water production of bubble discharge in wellbore profile are predicted by using gas-foam-flow pattern, and the process rules of bubble discharge are recommended.The research results of this paper provide important technical support for the design of foam drainage gas recovery technology in western Sichuan gas field, and also have certain reference value for the theoretical study of foam pipe flow.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE377

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