多元热流体吞吐窜流影响灰色关联定量分析

稠油油藏进行多轮次吞吐热采时,由于地质和工艺条件差异易造成井间窜流现象,为分析各因素对多元热流体吞吐窜流的影响程度,运用灰色关联方法,通过计算各因素关联度以量化确定它们的影响大小及主次关系。研究结果表明,影响多元热流体吞吐井间窜流因素的敏感性大小排序为:渗透率、油层厚度、注采压差、注入强度、原油黏度,并据此提出有针对性的治理措施。该研究成果可为多轮次吞吐热采方案设计及后期窜流治理提供参考依据。

Gray Correlative Quantitative Analysis on the Influence of Steam Channeling of Multiple Thermal Fluids

Steam channeling cross well usually takes place due to differences in geologic conditions and technologic conditions during thermal recovery by multiple cyclic steam stimulation in viscous oil reservoir. In order to analyze the main reasons for steam channeling, grey correlative method has been used to calculate the relevance degree of different factors, determine quantitatively the influences of these factors on steam channeling, make clear which one is the primary or secondary important factor. The results show that the sensitivity of the factors affecting cross well steam channeling during multiple thermal fluid stimulation in horizontal wells ranks as follows: permeability, reservoir thickness, injection production pressure difference, injection strength, and the oil viscosity. In addition, some controlling measures have been put forward. The research results also can provide certain reference for thermal recovery scheme design and governing measures.