酒东油田注水开发过程中防垢技术研究

发布时间：2018-03-09 22:36

本文选题：注水开发　切入点：碳酸钙垢　出处：《西南石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着石油天然气开采速度的加快,注水开发的深入,产出液中的含水率越来越高,油田水结垢问题对油田的正常生产造成的影响越来越明显。本文以酒东油田水分析资料为基础资料,开展结垢理论预测和实验研究。研究结果表明,地层结垢主要为碳酸钙垢,混配比、pH值及温度是影响地层结垢的主要因素,C02含量及矿化度影响次之,压力对地层结垢影响较小。根据酒东油田注水过程中的结垢类型,进行了阻垢剂类型优选实验研究。实验结果可知：注入水与地层水以2：8混合时,TH-607B阻垢效果最好；产出污水与地层水以4：6混合时,DTPMP阻垢效果最好；注入水与产出污水与地层水以0.4：3.6：6混合时,DTPMP阻垢效果最好。由阻垢效果评价实验结果得出：随着阻垢剂浓度升高,阻垢率先升高后降低；伴随流体温度的升高,阻垢率降低；压力对阻垢效果影响较小；pH值在中性时,阻垢剂阻垢效果最佳；随着C02含量增加,阻垢效果也有所增加但效果不明显；矿化度在5.5g/L时,阻垢效果最好。综合上述实验结果,得到适用于酒东油田注水开发过程中的阻垢剂类型及阻垢剂最佳用量。为了提高阻垢剂的阻垢效果,开展了复配阻垢剂对阻垢效果的影响研究。通过实验结果可知,复配比例为1：1及浓度为80mg/L时,复配阻垢剂TH-607B/DTPMP和TH-1/DTPMP优于其他复配类型。不同因素下复配阻垢剂与单一阻垢剂对阻垢效果影响趋势一样,但是阻垢效果要好于单一阻垢剂。在考虑经济因素的情况下,酒东油田应尽量的使用复配阻垢剂,为酒东油田化学防垢提供理论及实验依据。
[Abstract]:With the acceleration of oil and natural gas production and the deepening of water injection development, the water cut in the output liquid is getting higher and higher. The influence of scaling problem on the normal production of oil field is more and more obvious. Based on the water analysis data of Jiudong Oilfield, the scaling theory prediction and experimental study are carried out. The results show that the formation scaling is mainly calcium carbonate scale. The pH value and temperature are the main factors which affect the formation scaling. The second is the content of C02 and the degree of mineralization, but the pressure has little effect on the formation scaling. According to the scaling types in the process of water injection in Jiudong Oilfield, the optimum selection of scale inhibitor was carried out. The experimental results show that the scale inhibition effect of TH-607B is the best when the mixture of injected water and formation water is 2: 8; The scale inhibition effect of DTPMP is the best when the mixture of produced sewage and formation water is 4: 6, and the effect of DTPMP is the best when the mixture of injected and produced sewage and formation water is 0.4: 3.6: 6. The experimental results of scale inhibition evaluation show that the scale inhibition effect increases with the increase of scale inhibitor concentration. With the increase of fluid temperature, the scale inhibition rate decreased. When the pressure had little effect on the scale inhibition effect, when pH value was neutral, the scale inhibitor had the best scale inhibition effect; with the increase of CO2 content, the scale inhibitor had the best scale inhibition effect. When the salinity is 5.5 g / L, the scale inhibition effect is the best. Based on the above experimental results, the type of scale inhibitor and the optimum amount of scale inhibitor suitable for water injection development in Jiudong Oilfield are obtained. In order to improve the scale inhibition effect of the scale inhibitor, the influence of the compound scale inhibitor on the scale inhibition effect was studied. The experimental results show that when the ratio of scale inhibitor is 1: 1 and the concentration is 80 mg / L, The effect of compound scale inhibitor TH-607B/DTPMP and TH-1/DTPMP on scale inhibition effect is the same as that of single scale inhibitor under different factors, but the scale inhibition effect is better than that of single scale inhibitor. In order to provide theoretical and experimental basis for chemical scale prevention in Jiudong Oilfield, the compound scale inhibitor should be used as far as possible.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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