渤海稠油乳状液形成及破坏实验研究
发布时间:2018-05-08 22:16
本文选题:渤海稠油 + 原油乳状液 ; 参考:《东北石油大学》2017年硕士论文
【摘要】:本论文根据渤海地区稠油在热采过程中易形成乳状液的背景,通过渤海稠油乳状液形成及破坏的实验研究,总结了渤海地区稠油乳状液的形成及破坏机理。首先对渤海地区产出稠油进行了物性分析。通过室内实验对稠油四组分及稠油的粘度温度变化规律进行了研究,现场对地层注入水和产出水质进行了分析,确定了稠油的理化性质;得到了渤海原油在65℃时,原油的粘度为474.9mPa·S,在30℃时,原油的粘度为9283.2mPa·s,原油属于典型的稠油范畴,且原油粘度随温度的变化幅度较大。胶质沥青质和非烃类物质含量较高,地层注入水以及产出水质成分分析表明:产出水矿化度为2315.38mg/L,PH值为8.93;注入水矿化度为179.99mg/L,PH值为8.93。总结了渤海稠油乳状液形成机理。然后利用模拟地层水与稠油进行了模拟乳状液的配制,研究了不同乳化条件及不同油水比形成的乳状液粘度的关系,确定了渤海稠油乳化严重条件,包括严重乳化的温度区间及乳状液含水率与粘度的关系。对渤海稠油乳化条件进行了分析,得到了不同温度下稠油乳化粘度,得到了乳化严重区间在100℃~150℃。当乳化温度较低时(低于100℃),稠油粘度高,乳化不完全;当温度较高时(高于150℃),由于温度较高产生的油水密度差异较大,产生的重力分异效果明显,高温度对乳化产生了一定程度的破坏作用。同时深入的研究了渤海稠油乳状液的微观特征,破坏渤海稠油乳状液的影响因素,分析了原油乳状液破乳研究的发展状况。在此基础上,归纳总结了渤海稠油乳状液的破坏机理及油田用破乳剂类型,并创造性的提出了针对渤海稠油乳状液的破乳剂选择原理。
[Abstract]:Based on the background of the formation of emulsion during thermal recovery of heavy oil in Bohai area, the formation and failure mechanism of heavy oil emulsion in Bohai region is summarized through the experimental study on the formation and destruction of viscous oil emulsion in Bohai Sea. Firstly, the physical properties of heavy oil produced in Bohai area are analyzed. Through laboratory experiments, the changes of viscosity and temperature of four components of heavy oil and heavy oil were studied. The injection water and water quality of formation were analyzed in the field, the physical and chemical properties of heavy oil were determined, and the crude oil of Bohai Sea was obtained at 65 鈩,
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