海上探井稠油热采测试井口抬升问题的对策研究

COUNTERMEASURE RESEARCH ON WELLHEAD LIFTING IN OFFSHORE OILFIELD HEAVY OIL EXPLORATION WELL THERMAL RECOVERY TEST

在海上油田稠油探井热采测试作业过程中,由于热应力的存在,使得井口在注热作业时会出现晃动或抬升的现象,存在重大的安全隐患。海上油田探井测试作业成本高,假若出现类似问题后再采取补救措施,无疑在浪费了作业时间同时,大大的增加了作业成本,甚至增大了安全隐患和发生事故的概率。通过对南堡油田稠油热采注热工艺及其管柱的研究发现,经过设计和计算可适当在注热管柱上配加一定数量的热应力补偿器,进而缓解高温、高压的多元热流体对注热管柱的损害,从而保障注热作业的顺利进行,其对稠油探井热采测试作业也具有一定的借鉴意义。

During offshore heavy oil exploration well thermal recovery test operation,the wellhead appears sway and lifting because of the existence of thermal stress,it leaves major source of hidden danger. The cost of offshore oilfield exploratory testing operation is high,if adopt remedial measures after the similar problems happens,it will definitely extremely increase the operation cost even the occurrence probability of hidden danger and accident. Through the research on heavy oil thermal recovery technology and its tubular column structure in Nanpu oilfield,it was found that properly allocating reasonable quantities of thermal stress compensator could relieve the damage of the multiple HTHP thermal fluid to heat injection tubular column.Thereby,it guarantees heat injection operation go smoothly,also it has certain reference meaning for heavy oil exploration well thermal recovery test operation.