钻井液与完井液2024，Vol.41Issue(3)：325-329,5.DOI:10.12358/j.issn.1001-5620.2024.03.006
渤中凹陷裂缝性致密储层钻开液伤害研究
Study on Damage by Drilling Fluid of Fractured Tighten Reservoirs in Bozhong Sag
摘要
Abstract
The evaluation of reservoir damage is important to reservoir protection and oil and gas yield improvement.Reservoirs in the Bozhong sag of the Bohai Bay Basin are naturally fractured tight reservoirs,coring in these reservoirs is difficult and many different methods of evaluating the reservoir damage are in use,resulting in difficulties in implementing effective reservoir protection measures.To deal with this problem,combined with the actual situation of reservoirs,design and manufacture 3D printed fractured cores with transparent and visible interior and reservoir damage evaluation devices.In evaluating reservoir damage by different drill-in fluids used in Bozhong,the flow-rate damage rate instead of the permeability damage rate is used.Experimental results show that the drill-in fluid EZFLOW,which is presently in field application,has stable rheology and good filtration property.Compared with 3% bentonite drilling fluid,the EZFLOW drill-in fluid imposes smaller damage to the reservoirs,the rates of reservoir damage imposed by the EZFLOW drill-in fluid are between 11.7% and 26.2%,which are weak reservoir damage.The rate of damage to the cores is decreasing with increase in the opening degrees of the cores;for different fractured cores,the longer the cores and the wider the fractures,the higher the damage rate.关键词
3D打印透明裂缝岩心/流量伤害率评价法/钻开液伤害研究Key words
3D printed transparent fracture core/Flow rate damage rate evaluation method/Study on damage by drill-in fluid分类
能源科技引用本文复制引用
张宇飞,王超群,徐博韬,苗海龙,罗程,苏俊霖..渤中凹陷裂缝性致密储层钻开液伤害研究[J].钻井液与完井液,2024,41(3):325-329,5.基金项目
中海油田服务股份有限公司重点科研项目"海上中深层低渗/裂缝储层伤害评价方法研究及应用"(YHB22YF006). （YHB22YF006）
