重力热管式抽油杆柱吸收地热加热井筒技术

Technology of well-bore heating with geothermal energy transferred by gravity heat pipe suck rod string

针对目前蒸气吞吐井采用的电加热及热流体循环工艺存在的能耗大、运行成本高及井下作业复杂等问题,依据热管原理,将机抽井中的空心抽油杆经过加工处理改制成具有高效传热功能的重力热管,形成利用抽油杆柱吸收地热加热井筒新技术;介绍油井现场制造重力热管式抽油杆柱的操作工艺;依据辽河油田3口试验井资料分析加热井筒新技术适用条件及影响因素.结果表明:对于油层深度<1300m、油层流体温度为100～120℃、油层条件下原油黏度<10Pa·s、周期注气量≥2000m3及产液量≥15m3/d,在产液量20m3/d以上的蒸气吞吐井应用这种新技术可以取得加热井筒的好效果.

High energy consumption,high operation cost and complex downhole operation pose great dif- ficulties in the present production method of steam stimulated well using electric heating and hot fluid circulating.Based on the principle of heat pipe,the hollow suck rod was processed into the gravity heat pipe with high heat transfer efficiency,and the technology of absorbing geothermal energy to heat wellbore by suck rod string was put forward.This paper described in detail the operation process to make on-site t...