杏南油田萨Ⅱ、Ⅲ组油层三次采油注入体系研究  

Research on Tertiary Oil Recovery and Injection System of SaⅡ,ⅢReservoirs in Xingnan Oilfield

作　　者：霍迎冬 刘晓文[1] 张景远 田宇昕 施尚明[1] HUO Yingdong;LIU Xiaowen;ZHANG Jingyuan;TIAN Yuxin;SHI Shangming(School of Earth Sciences,Northeast Petroleum University,Daqing 163316,China;Research Institute of Exploration and Development of Daqing Oilfield Co.,Ltd.,Daqing 163712,China)

机构地区：[1]东北石油大学地球科学学院,黑龙江大庆163316 [2]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《甘肃科学学报》2023年第4期15-22,共8页Journal of Gansu Sciences

摘　　要：根据杏南油田纯油区三次采油层系组合及井网演化规律研究结果,考虑萨Ⅱ、Ⅲ组油层性质及开发形势,需开展杏南油田萨Ⅱ、Ⅲ组三次采油注入体系研究。对微观孔隙结构及多学科油藏成果进行了研究,确定萨Ⅱ、Ⅲ组油层微观剩余油主要以簇状、粒内及粒间为主,砂体动用较好,进一步挖潜需考虑扩大波及体积,从而提高驱油效率。结合室内实验研究成果,600×10^(4)~900×10^(4)分子量聚合物及弱碱三元复合体系与油水具有较好的配伍性,并且驱油实验结果表明相同的段塞尺寸下,不论均质、非均质岩心,无碱二元复合体系的采收率增幅最高,其次为弱碱三元复合体系、强碱三元复合体系、聚合物、碱/表面活性剂二元复合体系。According to the research results of the tertiary oil recovery layer combination and well pattern evolution law in the pure oil area of Xingnan Oilfield,considering the properties and development situation of the Sa Ⅱ and Ⅲ oil layers,it is necessary to carry out the research on the tertiary oil recovery and injection system of the Sa Ⅱ and Ⅲ groups in Xingnan Oilfield.In this paper,based on the microscopic pore structure and multidisciplinary reservoir research results,it is determined that the microscopic remaining oil in the Ss Ⅱ and Ⅲ oil layers is mainly clustered,intragranular and intergranular.Further tapping potential needs to consider the expanded wave and volume to improve displacement efficiency.Combined with the results of laboratory experiments,the ternary composite system of 600~900×10^(4) molecular weight polymer and weak base has good compatibility with oil and water.Moreover,the results of oil displacement experiments show that under the same slug size,regardless of homogeneous or heterogeneous cores,the recovery ratio of the alkali-free binary composite system has the highest increase,followed by the weak alkali ternary composite system,the strong alkali ternary composite system,the polymer,and the alkali/surfactant binary composite system.

关 键 词：杏南油田 萨Ⅱ、Ⅲ组油层 三次采油 注入体系 驱油实验 

分 类 号：TE34[石油与天然气工程—油气田开发工程]