摘要
针对J油田面临油田层间、层内矛盾突出,指进现象严重等问题,研究了目标油田地质油藏特征及注采工况条件,制备了适合J油田的层内生气复合泡沫调驱体系。通过测定不同浓度配比的自生气体系生气量,优选出体系浓度及配比;通过搅拌法和泡沫扫描仪法,优选出起泡剂QP-5;通过成胶实验,筛选出强化剂体系(干粉聚合物3000 mg/L+交联剂3000 mg/L):三者复配形成层内自生气复合泡沫调驱体系。封堵和驱油实验结果表明:层内自生气复合泡沫调驱体封堵率达到97.32%;层内自生气复合泡沫调驱体系能够启动中、低渗岩心的剩余油,从而大幅度提高采收率。
The J oilfield is facing problems such as prominent inter-layer and intra-layer contradictions,serious fingering phenomenon,etc.Combining the geological reservoir characteristics and injection-production conditions of the target oilfield,the interbedded gas compound foam profile control and flooding system suitable for J oilfield is proposed.By measuring the amount of gas generated by the spontaneous generation system with different concentration ratios,the optimal concentration was found to be 8%;Through the stirring method and the foam scanner method,the optimal foaming agent was found to be QP-5;The enhancer system(3000 mg/L of dry powder polymer+3000 mg/L of crosslinking agent)was selected through the gel forming experiment.The self-generating foam control and flooding system in the formation layer were formed by the combination of three compositions.The plugging experiment shows that the plugging rate of the self-generating composite foam control and displacement body in the layer reaches 97.32%.The oil displacement experiment shows that the self-generating composite foam control and displacement system in the layer can drive the remaining oil in the middle and low permeability cores,and thereby greatly improves recovery factor.
作者
胡雪
刘浩洋
赵军
吴彬彬
郑继龙
陈平
Hu Xue;Liu Haoyang;Zhao Jun;Wu Binbin;Zheng Jilong;Chen Ping(CNOOC Ener Tech-Drilling & Production Co., State Key Laboratory of Offshore Oilfield Exploitation, Tianjin 300452, China)
出处
《精细石油化工》
CAS
2022年第1期5-9,共5页
Speciality Petrochemicals
关键词
层内生气
泡沫调驱
泡沫综合值
封堵率
采收率
gas generation in layer
foam profile control and flooding
comprehensive value of foam
blocking rate
oil recovery
