An integrated evaluation on factors affecting the performance of superheated steam huff and puff in heavy oil reservoirs

Production of superheated steam huff and puff wells is affected by reservoir geological characteristics (effective thickness, net gross ratio), the state of development (recovery degree, comprehensive water-cut) and steam injection factors (strength of steam injection, steam injection rate, temperature and degree of superheat), etc. On the basis of analysis of each factor, factors set were established and the weight of each factor was determined by the functional correlation between the factors and production of each well. The measured value of each factor was computed by dimensionless analysis of each factor. The comprehensive measured value of all factors was computed by dimensionless value of each factor through comprehensive evaluation methods. Statistics showed that the higher the comprehensive measured value of all factors, the higher the oil production of each well. According to this good correspondence, the comprehensive evaluation template was formed, and the total coincidence reached 96% with high reliability in the practical application in the Kenkiyak Oilfield, Kazakhstan. ： 过热蒸汽吞吐井生产效果受油藏地质特征（储集层有效厚度、净毛比）、开发状况（采出程度、综合含水）及注汽因素（注汽强度、注汽速度、注汽温度和过热度）等诸多因素的影响。在对各影响因素逐一分析的基础上，建立影响因素集，利用各因素和吞吐井产量之间的相关性确定各因素的权重；将各因素的实际数值无量纲化，分别计算其测度值；采用综合评判方法确定各影响因素的综合测度值。统计肯基亚克油田已吞吐井影响因素综合测度值与开发效果之间的关系，发现综合测度值越高，开发效果越好，二者之间具有很好的对应关系，以此建立过热蒸汽吞吐开发效果综合评价模版，在实际应用中该模版总符合率达到96%，具有较高的可信度。图5表6参21