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气顶稠油油藏中稠油和天然气的流动性能相差悬殊，在采油过程中不可避免地会发生油井气窜。由于气窜气量难以准确劈分，目前国内该类油藏气采收率大多以类比法确定，其结果误差相对较大。该文通过对高３块油井气窜气量的准确劈分，把气顶稠油油藏中天然气分解为气顶和稠油溶解气两部分研究。并通过总结在开发过程中气顶总压降与累积产气量关系，得出了高３块稠油气顶气藏的开采特征类似弹性定容气驱气藏的结论，进而应用压降法、物质平衡法、产量统计规律法分别对高３块气顶气和稠油溶解气采收率进行了计算。经多种方法验证，结果较为准确。为今后制定开发技术政策提供了依据。
The flow performance of heavy oil and natural gas in gas-filled heavy oil reservoirs is quite different. Oil well gas channeling inevitably occurs during oil production. Since it is difficult to accurately split the amount of blow-by gas, most of the gas recovery rates of this type of reservoirs in China are determined by the analogy method, and the error of the result is relatively large. In this paper, through the accurate splitting of the blow-by gas in the upper three wells, the natural gas in the gas-cap heavy oil reservoir is decomposed into gas cap and heavy oil dissolved gas. By summarizing the relationship between the total gas pressure drop and the cumulative gas production in the process of development, the conclusion is drawn that the mining features of the top three heavy oil and gas capitals are similar to the elastic constant volume gas-purged gas reservoirs, and then the pressure drop method, material Balance method and production statistics method were respectively used to calculate the recovery rates of dissolved gas in the high three gas cap and heavy oil. After a variety of methods to verify the results are more accurate. It provides the basis for formulating technical policies in the future.