葡北试验区抗盐聚合物驱油效果研究
发布时间：2019-07-10 08:55
【摘要】：试验区位于葡萄花油层的北部,是中低渗、高矿化度油藏,目前已经进入高含水开发后期。针对葡北试验区的地质条件、储层物性特点及目前生产状况,使用相对分子质量低但溶液体系粘度高的抗盐聚合物,以求最大程度地开发葡北试验区油藏的剩余油,因此本文提出了葡北试验区抗盐聚合物驱油效果的研究,可为现场实际生产需要提供理论依据和技术支持。通过室内性能评价实验,研究了抗盐聚合物溶液的浓度、放置时间、剪切应力、温度及水质对抗盐聚合物溶液粘度的影响,实验结果表明抗盐聚合物溶液具有良好的耐温、抗盐和抗剪切性能;通过PETREL建模软件建立了葡北试验区三维地质模型,并利用ECLIPSE数值模拟技术进行水驱历史拟合,确定了剩余油的分布规律和开发的主力油层;针对试验区的油层特点,利用人造非均质岩心和ECLIPSE数值模拟软件,研究了注入浓度、注入速度和注入量对抗盐聚合物溶液驱油效果的影响,得到了适合葡北试验区合理的注入参数及注入段塞的大小;在此基础上进行室内驱油实验和开发指标的预测,结果表明,水驱之后抗盐聚合物溶液还能提高10%以上的原油采收率;为了更好地开发试验区中、低渗透层中的剩余油,对后续水驱的开采方式进行了优选,其中按目前射开目的层进行聚驱,聚驱结束后补开所有未射孔层进入后续水驱至含水98%的效果最好,能维持试验区合理生产18.8年,最终采收率能达到51.13%。
[Abstract]:The experimental area is located in the north of Putaohua Reservoir, which is a medium and low permeability and high salinity reservoir, and has entered the later stage of high water cut development. In view of the geological conditions, reservoir physical properties and current production conditions in Pubei experimental area, salt-resistant polymers with low relative molecular weight but high viscosity of solution system are used in order to develop the remaining oil in Pubei experimental area to the greatest extent. therefore, the study on the effect of salt-resistant polymer flooding in Pubei test area is put forward in this paper, which can provide theoretical basis and technical support for field production. The effects of concentration, placement time, shear stress, temperature and water quality of salt-resistant polymer solution on the viscosity of salt-resistant polymer solution were studied by laboratory performance evaluation experiment. the experimental results show that salt-resistant polymer solution has good temperature resistance, salt resistance and shear resistance. The three-dimensional geological model of Pubei experimental area is established by PETREL modeling software, and the water drive history is fitted by ECLIPSE numerical simulation technology, and the distribution law of remaining oil and the main reservoir developed are determined. According to the reservoir characteristics of the test area, the effects of injection concentration, injection speed and injection amount on the oil displacement effect of salt polymer solution were studied by using artificial heterogeneous core and ECLIPSE numerical simulation software, and the reasonable injection parameters and plug size suitable for Pubei test area were obtained. On this basis, the laboratory flooding experiment and the prediction of development index are carried out. the results show that the salt-resistant polymer solution can also increase the oil recovery by more than 10% after water flooding. In order to better develop the remaining oil in the low permeability layer in the test area, the recovery mode of the subsequent water drive is optimized, among which the polymer flooding is carried out according to the current target layer, and the effect of filling all the unporous layers into the subsequent water drive to 98% after the polymer flooding is the best, which can maintain the reasonable production of the test area for 18.8 years, and the final recovery can reach 51.13%.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.46
本文编号：2512492
[Abstract]:The experimental area is located in the north of Putaohua Reservoir, which is a medium and low permeability and high salinity reservoir, and has entered the later stage of high water cut development. In view of the geological conditions, reservoir physical properties and current production conditions in Pubei experimental area, salt-resistant polymers with low relative molecular weight but high viscosity of solution system are used in order to develop the remaining oil in Pubei experimental area to the greatest extent. therefore, the study on the effect of salt-resistant polymer flooding in Pubei test area is put forward in this paper, which can provide theoretical basis and technical support for field production. The effects of concentration, placement time, shear stress, temperature and water quality of salt-resistant polymer solution on the viscosity of salt-resistant polymer solution were studied by laboratory performance evaluation experiment. the experimental results show that salt-resistant polymer solution has good temperature resistance, salt resistance and shear resistance. The three-dimensional geological model of Pubei experimental area is established by PETREL modeling software, and the water drive history is fitted by ECLIPSE numerical simulation technology, and the distribution law of remaining oil and the main reservoir developed are determined. According to the reservoir characteristics of the test area, the effects of injection concentration, injection speed and injection amount on the oil displacement effect of salt polymer solution were studied by using artificial heterogeneous core and ECLIPSE numerical simulation software, and the reasonable injection parameters and plug size suitable for Pubei test area were obtained. On this basis, the laboratory flooding experiment and the prediction of development index are carried out. the results show that the salt-resistant polymer solution can also increase the oil recovery by more than 10% after water flooding. In order to better develop the remaining oil in the low permeability layer in the test area, the recovery mode of the subsequent water drive is optimized, among which the polymer flooding is carried out according to the current target layer, and the effect of filling all the unporous layers into the subsequent water drive to 98% after the polymer flooding is the best, which can maintain the reasonable production of the test area for 18.8 years, and the final recovery can reach 51.13%.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.46
【参考文献】
相关期刊论文 前1条
1 于海洋;张健;赵文森;杨光;由庆;王业飞;;绥中36-1油田疏水缔合聚合物冻胶成胶影响因素实验研究[J];中国海上油气;2009年06期
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