摘要
大庆页岩油储层以泥岩为主,塑性较强,孔隙度、渗透率极低,且层理缝不同程度发育,需采用体积压裂技术才能获得理想产能。通过对大庆页岩油压裂试验的第一口水平井YX-1井的地质特征进行分析,攻破压裂改造难点,个性化设计压裂方案,优选了压裂段数、施工规模及压裂原材料等,并制订了针对性体积压裂改造措施。按照设计分4段进行压裂施工,共加入压裂液6055m^3、支撑剂280m^3,加入液氮64.2m^3,加入纤维350kg,平均砂液比为4.6%,施工排量为12m^3/min,压裂后测试日产油量为3.8m^3。该井施工获得成功,证实体积压裂技术适合页岩油的增产改造,为今后大庆页岩油的压裂施工提供了借鉴经验。
Shale oil reservoirs in Daqing mainly belong to mudstones, with strong plasticity, ultra-low porosity and permeability, whose bedding fractures were developed in different degrees, therefore, the ideal productivity can be realized through volume fracturing technology.Through the analysis of the geological characteristics of Well YX-1,the first horizontal well for shale oil fracturing test in Daqing, the difficulties of fracturing stimulation is overcome,and the fracturing plan is designed specifically to optimize the numbers of fracturing stages, operation scale and fracturing raw materials etc.In addition, the corresponding volume fracturing stimulation methods are carried out.Fracturing operation was carried out in four stages according to the design with the total fracturing liquid of 6055 m^3,proppant of 280 m^3, liquid nitrogen of 64.2 m^3, fibers of 350 kg, the average sand-liquid ratio of 4.6%, and the op-eration displacement of 12 m^3/min.The daily oil production after fracturing is 3.8 m^3.The successful operation of Well YX-1 proves that the volume fracturing technology is suitable for the shale oil stimulation, which provides references for fracturing operation of Daqing shale oil in the future.
作者
杨春城
李存荣
侯堡怀
尚立涛
王海涛
Yang Chuncheng;Li Cunrong;Hou Baohuai;Shang Litao;Wang Haitao(Production Technology Institute of Daqing Oilfield Limited Company)
出处
《采油工程》
2019年第4期7-11,80,共6页
Oil Production Engineering
基金
中国石油天然气股份有限公司重大科技专项“松辽盆地北部石油精细勘探技术完善与规模增储”(2016E-0201).
关键词
页岩油
体积压裂
施工参数
纤维
液氮
shale oil
volume fracturing
operation parameter
fiber
liquid nitrogen
作者简介
第一作者:杨春城,1989年生,男,工程师,现主要从事压裂增产改造方面的理论与应用研究工作。邮箱:chunchengyang@petrochina.com.cn。
