压裂充填防砂工艺经济评价

对于压裂充填防砂工艺,除了从技术上证实其可行,还需要从经济角度对其进行评价分析。压裂充填措施成本主要指压裂充填实施过程中直接投入的劳务费、材料费、车船费和配液费,压裂充填井的生产成本主要包括油气处理费、动力费、储量使用费以及砂处理费。采用指数递减、调和递减、双曲递减、衰减递减以及直线递减模型来描述压裂充填井产量递减过程。考虑资金的时间价值,提出了压裂充填经济评价指标体系,主要包括防砂施工的净现值、投资回收期、防砂施工的投资贴现利润率和内部收益率。实例井分析表明,压裂充填防砂在经济上是划算的,与管内砾石充填相比,虽然压裂充填总成本增加了6.2万元,但压裂充填净增产值34.8万元,净增利润14.8万元。

Economic evaluation of frac and pack sand control technique

Frac and pack sand control technology would be proved to be not only realizable in technique but also feasible in economy.Frac pack cost includes cost of labour,material expenses,vehicle cost and mixed fee which are expended during treatment.The production cost includes oil gas handling cost,expenditure on power,reserves fee consisting of production cost of frac pack for sand producing wells,and sand handling fee.Production decline models including exponential decline and harmonic decline are presented.Considering fund value changing with time,indicator system of frac & pack economic evaluation are also presented.Although cost of frac pack is $62,454.61 greater than that of cased hole gravel packing,net present value of frac pack is $148,077.65 more than that of gravel packing.Therefore,frac pack is profitable.