考虑元素硫沉积的水平井产量预测方法研究

随着含硫气藏的深入开发,水平井的作用也变得越来越重要,准确预测水平井产量对于含硫气藏开发具有重要的意义。考虑元素硫沉积对储层渗透率的影响,建立含硫气藏水平井产量预测公式,并分析水平井长度、储层有效厚度、元素硫沉积和非均质性对产量的影响,其中元素硫沉积和非均质性对水平井产量影响较大。计算结果表明,考虑元素硫沉积的Joshi公式和陈元千公式计算结果与实际产量接近,可用于含硫气藏生产初期产量预测,该结论对类似气藏开发具有一定的借鉴意义。

Horizontal Well Production Prediction Method Considering the Elementary Sulfur Deposition

With the further development of sour gas reservoirs,horizontal wells have become increasingly important.Accurate prediction of horizontal well production in sour gas reservoirs was of great significance.In consideration of the effect of sulfur deposition on permeability of reservoirs,the production prediction formula of horizontal wells in sour gas reservoirs was presented,the effects of horizontal well length,reservoir effective thickness,elemental sulfur deposition and heterogeneity on the production were analyzed,in which the effects of elementary sulfur deposition and heterogeneity were serious.Studies show that the results of Joshi’s formula and Chen Yuanqian’s formula,which consider the deposition of elemental sulfur,are close to the actual production.The two formulae can be used to forecast early production in sour gas reservoirs.