【摘要】 综合评价了稠油蒸汽吞吐过程中加热半径计算的3种经典模型,并推导出了稠油蒸汽吞吐过程中最大加热半径计算公式,首次采用Buckley-Leverret方程计算了热水带的加热半径,其结果与油田开发实际符合较好。同时,首次提出了稠油蒸汽吞吐在多轮次加热过程中的一种新理论:在1~4周期蒸汽起到了扩大加热半径的作用,随着周期增多而加热前缘向外扩展作用减小,蒸汽主要起重复加热油层的作用。本文导出的新模型公式及提出的新理论,对于不同类型稠油油藏蒸汽吞吐的井距设计具有一定的借鉴意义。更多还原

【Abstract】 3 typical models for calculating heating radius during cyclic steam stimulation are evaluated and the maximum heating radius equation is derived.Buckley-Leverret equation is first used to calculate the heating radius of hot water zone,and the result coincides well with oilfield development practice.Meanwhile,a new CSS theory is proposed: from Cycle 1 to 4,steam heating radius is increasing,the expansion of heating front slows down as cycles go on and the steam will heat oil reservoir repeatedly.The new equation and new theory given in this paper are helpful to well spacing design of CSS in various heavy oil reservoirs.更多还原