边底水油藏化学驱提高采收率实验研究

发布时间：2018-04-17 23:13

本文选题：化学驱 + 非均质油藏　；参考：《特种油气藏》2017年06期

【摘要】：为探索冀东油田高浅南油藏化学驱提高采收率技术,研制适应油藏条件的驱油用表面活性剂,利用均质岩心模型和3层非均质岩心模型开展化学驱驱油实验,对该油藏化学驱提高采收率的可行性进行综合评价。实验结果表明:研制的表面活性剂降低油水间界面张力的能力较强,浓度为0.3%时油水界面张力即可达到10~(-3)mN/m数量级,拥有很强的提高驱油效率的能力;该表面活性剂对高浅南油藏具有较好的驱油效果,可在水驱基础上继续提高采收率15.00个百分点。研究认为,对于冀东油田高浅南油藏,采用单一表面活性剂驱采收率提高幅度较小,而采用调剖堵水+表面活性剂驱技术对提高采收率有明显效果。建议对于非均质性较弱的油藏,提高采收率应以提高驱油效率为主,对于非均质性较强的油藏,提高采收率应以提高波及效率为先。该研究结果对同类油藏提高采收率具有一定的借鉴意义。
[Abstract]:In order to explore the technology of chemical flooding to improve oil recovery in high shallow south reservoirs of Jidong Oilfield, to develop surfactant for oil displacement, the experiments of chemical flooding were carried out by using homogeneous core model and three layer heterogeneous core model.The feasibility of improving oil recovery by chemical flooding in this reservoir is comprehensively evaluated.The experimental results show that the developed surfactant has a strong ability to reduce the interfacial tension between oil and water, and when the concentration is 0.3, the interfacial tension of oil and water can reach the order of 10~(-3)mN/m, which has a strong ability to improve the oil displacement efficiency.The surfactant has a good oil displacement effect on the high shallow south reservoir and can continue to improve the oil recovery by 15.00 percentage points on the basis of water flooding.It is considered that for the high shallow south reservoirs of Jidong Oilfield, the oil recovery by using single surfactant flooding is small, while the oil recovery is improved by using profile control and water shutoff surfactant flooding technology.It is suggested that for reservoirs with weak heterogeneity, oil displacement efficiency should be improved in order to improve oil recovery, and for reservoirs with strong heterogeneity, the improvement of oil recovery should first be carried out to improve sweep efficiency.The results can be used for reference to improve oil recovery in similar reservoirs.
【作者单位】：中国石油冀东油田分公司;中国石油大学(北京);
【基金】：中国石油天然气集团公司科技项目“水驱提高采收率关键技术研究——南堡陆地断块油藏提高采收率技术研究与应用”(2014B-1113)
【分类号】：TE357.46

【相似文献】