摘要
目前针对稠油油藏蒸汽吞吐开采后的产能预测模型很多,但这些模型几乎没有考虑防砂方法对最终产能的影响,而防砂是稠油开采过程中必不可少的手段之一,因此,造成现有模型对防砂后蒸汽吞吐井的产能预测存在一定误差。考虑热采和防砂共同作用对蒸汽吞吐井产能的影响,同时结合重力超覆作用和稠油的流变行为对加热半径的影响,建立了冷油区和加热区的两区复合产能模型,并给出了计算实例。相对于传统模型,加热半径计算结果略大,但更符合实际; 使用该模型预测蒸汽吞吐井的产能与现场结果误差小于8%,证明了模型的可靠性。基于负幂指数的加热半径假设,不受加热面积、形状和油层厚度的影响。该模型计算工作量小,使用方便,可以为热采防砂井的产能预测提供重要依据。
There are many productivity prediction models for heavy oil wells with cyclic steam stimulation, but these models have little consideration on effects of sand control measures for the productivity, however, sand control measures are necessary for heavy oil stimulation, which result in some errors in calculation of the productivity. This paper presents a new productivity two zone model which considers the interaction of steam stimulation and sand control, and this model also combines the gravity override effect and the rheological behavior of heavy oil, then, it gives an actual example. Comparing with conventional models, the heating radi- us calculated through new model are greater and the calculation error is approximately 5% , which proves its validity. Based on negative power exponent of the heating radius hypothesis, the new model should not consider the heating area, shape and the influence of the reservoir thickness. The computing workload for new model is small and it is easy to use, which can provide plan for the productivity prediction for sand control well with thermal recovery.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第4期56-58,115,共3页
Petroleum Geology and Recovery Efficiency
基金
国家高科技研究发展计划("863"计划)"注气辅助 SAGD 技术研究与现场试验"(2009AA06Z205)
关键词
蒸汽吞吐
加热半径
防砂
表皮因子
产能预测
cyclic steam stimulation
heating radius
sand control
skin factor
productivity prediction
