中原地区地下储气库库址选择研究

STUDY ON LOCATION CHOOSING OF UNDERGROUND GAS STORAGES IN ZHONGYUAN AREA

为充分发挥“西气东输”管线和规划中的中国石化塔巴庙—济南长输管道系统的输气能力,确保季节 调峰和供气的安全性,需建设配套的地下储气库。河南、山东所处中原地区与西部气源相距远,天然气管道输送距 离很长,而中原油区恰好位于河南、山东两省交界处,具有丰富的天然气资源,同时具备多个建设地下储气库的枯 竭性气藏。因此,宜在中原油区建设天然气地下储气库。对比国内外地下储气库建设情况,结合中原油区气藏地 质特征和开发现状,提出了气藏改建为地下储气库的标准,然后对中原油区现有气藏进行筛选,从气藏的构造、断 层及盖层的封闭性、储集层的物性、单井注采气能力与储气库容量等方面,综合分析气藏建库的可行性。在上述工 作的基础上,优选出文96等4个气藏进行综合地质评价,评价结果认为在中原油区建设地下储气库完全可行,同 时认为文96气藏可作为首选的储气库库址,卫11气藏可作为继文96气藏后的建设储气库的后续工程,文23气 田、文13西气藏作为长远建设储气库工程的规划。

To bring the delivering capacity of the West-East Gas Pipeline and Sinopec Tabamiao-Jinan long pipeline system into full play and guarantee the safety of quarterly peak-shaving and gas delivery, it is necessary to build the matching underground gas storages. Henan and Shandong provinces lie at the Zhongyuan area, where is far away from the west gas source and long distance for gas transmission. The Zhongyuan area lies in the boundary between Henan and Shandong and has rich gas resource and several depleted gas reservoirs where are the favor places to build the underground gas storages. Comparing the underground gas storages at home and abroad, based on the geological features and the exploiting state of the gas reservoirs in the Zhongyuan area, the standards are proposed for reforming the gas reservoirs into the underground gas storages. Then, the existing gas reservoirs are selected in the Zhongyuan area. From the structure of the gas reservoirs, the closed ability of the faults and coverages, the physical property of the reservoirs, the gas injection/recovery capacity of a single well, and the capacity of the gas storages etc., the feasibility is integrally analyzed for the gas reservoirs to build gas storages. Based on the above activities, 4 gas reservoirs including Wen 96 etc. are chosen to conduct the integrative geological evaluation. The evaluation results show it is totally feasible to build underground gas storages in the Zhongyuan area. And the gas reservoir Wen 96 is the first selected as the location of the underground gas storage. The gas reservoir Wei 11 may be the next underground gas storage after Wen 96. The gas reservoirs of Wen 23 and west Wen 13 may be planned to build underground gas storages in future.