克拉玛依油田304断块氮气泡沫调驱正交优化设计

Orthogonal optimization design of nitrogen foam flooding in Block 304 of Karamay Oilfield

殷方好1 王 庆2 张 彬3 张清波

胜利油田分公司采油工艺研究院，山东 东营 257000 中国石油大学（北京）石油工程教育部重点实验室，北京 102249 东胜精攻石油开发集团股份有限公司，山东 东营 257000 胜利油田分公司孤岛采油厂，山东 东营 257231

Research Institute of Oil Production Technology, Shengli Oilfield Company, SINOPEC, Dongying 257000, China MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China Dongsheng Jinggong Petroleum Development Limited, Dongying 257000, China Gudao Oil Production Plant, Shengli Oilfield Company, SINOPEC, Dongying 257231, China

针对克拉玛依油田五3东区上乌尔禾组油藏非均质性严重、水驱开发效果较差的问题，以304断块为例，进行了氮气泡沫调驱的数值模拟研究。剩余油分布的统计结果表明，该断块剩余水驱可采储量较少，延续水驱潜力不大，主力层位的SW322小层剩余水驱可采储量仅占剩余储量的7.26%。采用正交分析方法研究了发泡剂质量分数、地下气液比、间隔时间等参数对氮气泡沫调驱效果的影响，方差分析结果表明，地下气液比对氮气泡沫调驱效果的影响最为显著；最优参数组合为发泡剂质量分数0.4%，地下气液比2∶1，间隔天数120 d。

Aiming at the problems of strong heterogeneity and poor waterflooding result of the oil reservoir in Upper Wuerhe Formation of East V3 Area in Karamay Oilfield, the numerical simulation of nitrogen foam flooding is conducted, taking Block 304 as an example. The research of remaining oil distribution shows that the remaining waterflooding recoverable reserves are less in the block, with little potential to waterflooding. The remaining recoverable reserves in SW322 layer of main horizon account for 7.26% of the remaining reserves. Orthogonal analysis method has been used for studying the effect of various parameters, including foam agent concentration, subsurface gas-liquid ratio and interval time, on the nitrogen foam flooding. Variance analysis shows that the subsurface gas-liquid ratio has the most obvious effect on nitrogen foam flooding. Optimal parameter combination is 0.4% foaming agent contents, with subsurface gas-liquid ratio 2∶1 and with interval number 120 d.