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由于河南油田稠油油藏具有“浅、薄、稠、散”的特点，所以蒸汽吞吐平均6个周期后，开发指标和经济指标明显降低。蒸汽吞吐后剩余油分布为：100m×141m及五点法并网，剩余油分布较为集中，100m×100m反七点法并网，剩余油分布零散；经济分析结果表明：浅薄层稠油油藏加密井吞吐单井的经济极限产量为1200～1500t，当油层厚度大于5.0m、纯总厚度比大于0.5，以及单井控制死油区面积大于0．5×10－2km2，且死油区离边水距离大于150m时，可进行加密，加密井蒸汽吞吐采收率可达14％左右。不同并网的加密方式为：100m×141m及五点法井网，采用直并加密方式；100m×100m反七点法并网，采用水平并加密方式。
Due to the characteristics of “light, thin, thick and loose” in heavy oil reservoirs in Henan Oilfield, the development indicators and economic indicators have obviously decreased after an average of six cycles of steam huff and puff. After the steam huff and puff, the residual oil distribution was 100m × 141m and the five-point method was used for grid connection. The residual oil distribution was more concentrated. The 100m × 100m anti-seven-point method was used for grid connection and the remaining oil was scattered. The economic analysis showed that the shallow thin- The throughput of an individual well with an encrypted well is 1200 ~ 1500t. When the reservoir thickness is greater than 5.0m, the pure total thickness ratio is greater than 0.5, and the area controlled by a single well is larger than 0.5 × 10-2km2, the dead zone Edge water distance greater than 150m, can be encrypted, encrypted well steam huff and puff recovery rate of up to 14%. Different methods of network integration are: 100m × 141m and five-well network, using straight and encryption; 100m × 100m anti-seven-point method and network, the use of level and encryption.