长井段水平井油管输送式射孔管柱防卡技术

Anti-stuck technology for tubing-conveyed perforating string in horizontal well with long perforating interval

水平井油管输送式射孔后,管柱遇卡的现象时有发生。长井段水平井油管输送式射孔时,由于射孔器串长,射孔后管柱遇卡的风险更高。文中结合PG气田DW区块地质特点,针对造成射孔管柱遇卡的主要原因,通过设计适合DW区块地质特点的关键射孔参数、研发低碎屑射孔弹、制定射孔管柱扶正措施等,降低了长井段水平井油管输送式射孔管柱遇卡的风险。该技术在PG气田DW区块4口超长井段水平井的射孔施工中应用,射孔一次成功率100%,射孔后管柱上提摩阻在正常范围内。

Daring tubing-conveyed perforatin （TCP） operations in horizontal wells stuck of pipe string after firing is likely happened. For TCP operations in horizontal wells with hmg perforating intervals, the probability of stuck of pipe string is greater because of the extreme long perfurator string. Combined with the geological characteristics uf DW Block in PG Gas Field, the research is performed on the main factors causing the stuck. Through selecting appropriate key perforating parameter, researching and developing low debris perfurating charges and taking centralizing measures of perforating string, the risk of stuck during TCP operations in horizontal wells with long perforating intervals is greatly reduced. While being utilized in TCP operations for 4 horizontal wells with extra-long perforating interval in DW Block of PG Gas Field, one-time success rate of TCP was 100%. After firing, the friction of pipe string while pulling out was within normal range. For horizontal wells with long perforating intervals, reasonable perforating parameters, low debris perforating charges and other technical measures can effectively prevent perforator string from getting stuck after firing.