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汽窜现象是影响稠油油藏蒸汽驱开发效果的一道主要技术屏障.为了精确地识别汽窜通道的大小,提高蒸汽驱采收率,本文提出了一套利用动态数据来定量研究汽窜通道的方法首先通过油井含水率和温度变化曲线识别汽窜井,其次考虑采出滞后现象,由不同组合下注采井之间的相关系数来判断窜通关系,最后建立了考虑凝析、油藏压力变化和温度变化的汽窜体积计算模型.以河南油田某区块L31615井为例,利用该方法进行了系统地分析,并进一步分析了整个区块的汽窜情况,得到汽窜通道分布和对应汽窜体积.研究发现汽窜的发生不仅局限于井组内,还可能发生在不再同一井组的注采井之间.汽窜通道体积的确定,为调堵措施提供了理论依据.
Steam channeling phenomenon is one of the major technical barriers affecting the development of steam flooding in heavy oil reservoirs.In order to accurately identify the size of steam channeling and improve the recovery rate of steam flooding, a set of dynamic data was used to quantitatively study steam channeling The method first identifies the steam traps by the oil well moisture content and the temperature change curve, and then considers the hysteresis of the production and the correlation coefficient between the injection and production wells under different combinations to determine the channeling relationship. Finally, Pressure variation and temperature variation of the gas injection volume.Based on an example of the L31615 well in a block of Henan Oilfield, this method was used to systematically analyze and analyze the gas-channeling conditions of the whole block to get the distribution of steam channeling channel Corresponding to the steam channeling volume.The study found that the occurrence of steam channeling is not only confined to the well group, but also between the injection and production wells that are no longer in the same well group.The determination of the steam channeling channel volume provides a theoretical basis for adjusting the plugging measures.