火驱气体示踪剂性能评价及应用

Evaluation and Application of the Gas Tracer for In-situ Combustion

考虑到火驱工程特点,选择化学性质稳定的气体作为示踪剂用于监测气体流向,进行稳定性和吸附性实验评价。以辽河油田火驱矿场试验区为例,依据物质平衡基本思想,建立了判定火烧油层燃烧前缘位置的新方法。分析了火驱前缘发展方向的影响因素。与传统方法对比,示踪剂辅助判定火烧油层燃烧前缘新方法能较准确地指示井组间的气体流向和不同方向的流量,从而避免了简单劈分产气量的误差,计算方法简便可行,结果更为准确可观。

Taking characteristics of in-situ combustion into account, a kind of chemically stable gas needs to be chose as a tracer, to monitor the situation of gas in the injection well conduct several experiments according to prop- erties of the reservoir to evaluate the stability and absorption of the gas tracer. Taking the test of in-situ combustion of Liaohe Oilfield as an example, according to the basic idea of material balance, a new method to determine front position of in-situ combustion, and calculate for the six well groups is established, and combined with engineering geological factor and to analysis the influencing factors of the front of in-situ combustion. Compared with the tradi- tional split the yield calculation methods, the tracer assisted determining the front of in-situ combustion as a new method can accurately indicate the direction of gas flowing and discharge of different directions, avoiding calcula- tion error of the gas production. At the same time, this new method is simple and more accurate.