重力热管式抽油杆柱吸收地热加热井筒技术

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.

地热驱动吸收式制冷技术在广东地热开发中的应用探讨

本文从分析广东省地热资源状况出发 ,介绍地热驱动吸收式制冷技术的应用意义 。

福州地热能源合理开发和利用的探索

本文介绍应用氨吸收式制冷循环原理，设计综合利用地下热水驱动的氨吸收式制冷装置，用于工农业生产及日常生活，实现节能。

重力热管式抽油杆柱加热井筒技术现场试验

目前蒸汽吞吐井采用的电加热及热流体循环工艺,存在能耗大、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,并形成了利用抽油杆柱吸收地热加热井筒新技术。介绍了油井现场制造重力热管式抽油杆柱的操作工艺,依据辽河油区3口试验井资料,分析了该技术的适用条件及影响因素。结果表明:对于油层深度低于1 300 m、油层流体温度为100～120℃、油层条件下原油黏度小于10 000 mPa.s、周期注汽量不低于2 000 m3及产液量不低于15 m3/d(最好在20 m3/d以上)的蒸汽吞吐井,应用该技术可取得加热井筒的好效果。

Economical Evaluation of a Low-Enthalpy Geothermal Resource Located in an Arid-Zone Area

In this work an economical evaluation that established the viability of a low enthalpy geothermal resource as an energy source in north Africa is presented. The factors considered included the payback period, average rate of return, net present value, and net benefit-cost ratio. The model was based on utilising the energy source to energise four models that comprised thermal equipment consisting of water/air cooled single/half effect lithium bromide water mixture absorption chillers and an R-245fa organic Rankine cycle. These modelled cycles were based on the energy demand for Waddan city a community in southern Libya which has a demand for combined cooling/electricity only or cooling/electricity with district hot water supply. The results revealed that all of the proposed simulated stand-alone models, except the water-cooled half effect chiller, are not economically viable unless they are heavily subsidized or combined with the district hot water supply at least in the winter season.