底水稠油油藏水平井复合增产技术

发布时间：2018-10-05 17:20

【摘要】：针对桩西油田强底水稠油油藏水平井单井产液量高、含水率高、开发效果差、剩余油动用难度大的问题,进行了底水稠油油藏复合增产技术研究。利用水平井二氧化碳吞吐可视化试验,分析了底水油藏水平井二氧化碳吞吐提高采收率的机理,同时针对单一二氧化碳驱易指进的问题,优选发泡剂和稳泡剂,研制了增黏型泡沫体系,并配制了乳化沥青堵水剂以封堵高渗透通道,形成了包括二氧化碳吞吐、增黏型泡沫体系和乳化沥青堵水剂的水平井复合增产技术。复合增产技术在桩1块底水稠油油藏应用7井次,平均含水率降低27.5百分点,累计增油量3 205t,取得了明显的降水增油效果。现场应用表明,复合增产技术可以解决底水稠油油藏水平井含水率高、剩余油动用难度大的问题。
[Abstract]:Aiming at the problems of high fluid production, high water cut, poor development effect and difficulty in producing remaining oil in horizontal wells of strong bottom water heavy oil reservoir in Zhuanxi Oilfield, the combined stimulation technology of heavy oil reservoir with bottom water is studied. Based on the visualization test of horizontal well carbon dioxide huff and puff, the mechanism of carbon dioxide huff and puff increase recovery in horizontal well of bottom water reservoir is analyzed. In order to solve the problem of single carbon dioxide flooding, foaming agent and foaming stabilizer are selected. The viscosity increasing foam system was developed and the emulsified asphalt water shutoff agent was prepared to seal the high permeability channel. The horizontal well compound production technology including carbon dioxide huff and puff, viscosity increasing foam system and emulsified asphalt water shutoff agent was formed. The application of compound increasing production technology in heavy oil reservoir with bottom water of block Duan 1 for 7 times, the average water cut is reduced by 27.5 percentage points, and the cumulative oil increment is 3 205 t, and the effect of precipitation and oil increase is obvious. The field application shows that the compound stimulation technique can solve the problems of high water cut in horizontal wells in heavy oil reservoirs with bottom water and the difficulty of producing remaining oil.
【作者单位】：中国石化胜利油田分公司桩西采油厂;
【基金】：国家自然科学基金项目“纳米粒子与表面活性剂的协同效应对提高原油采收率的影响”(编号:51474234) 中国石化胜利油田分公司科技攻关项目“边底水油藏水平井注CO2控水增产技术研究”(编号:YKC1309)联合资助
【分类号】：TE357

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