任11井潜山油藏改建地下储气库库容评价技术

Technological research on evaluation of rebuilding underground gas storage capacity in Ren-11 buried hill reservoir

杜玉洪 孟庆春 张辉

DU Yuhong MENG Qingchun ZHANG Hui

中国石油大学北京提高采收率研究中心,北京　102200 华北油田公司勘探开发研究院,河北任丘　062552

Enhanced Oil Recovery Center in China University of Petroleum, Beijing 102200, China Research Institute of Petroleum Exploration &

通过任11井油藏注气地质特征综合评价和水驱开采特征的研究，认为任11井油藏具备改建地下储气库的地质条件。对任11井裂缝性底水油藏改建地下储气库后的库容评价进行了研究，重点开展了室内实验、数值模拟研究，借鉴华北雁翎油田注氮气驱油现场试验经验，进行了类比计算等油藏工程研究。综合利用已有的认识和结论建立了任11储气库的三维数值模拟模型。在精细历史拟合的基础上，对库容和溶解气量等重要基础参数进行了指标预测。结果表明，任11井油藏改建储气库后，可以形成30×108 m3的库容。

The geological characteristics of gas injection and production performance by water flooding are comprehensively studied and evaluated in Ren-11 reservoir. It is considered that the geological condition in the reservoir is favorable for rebuilding underground gas storages. The capacity evaluation of underground gas storages after being rebuilt in Ren-11 fractured bottom water reservoir is conducted, in particular, the lab experiment and the research on numerical stimulation are conducted. Learning from the experimental experience in the gas displacement field by injecting nitrogen in the Huabei Yanling Oilfield, the reservoir engineering study such as analogical calculation is conducted. A 3-d numerical stimulation model is established in the Ren-11 gas storage on the basis of the existing recognition and conclusions. Based on the detailed history matching, the indexes for the important basic parameters including the storage capacity and the dissolved gas are predicted. The result shows that the capacity of the gas storage in Ren-11 reservoir after being rebuilt can reach as high as three billion cubic meters. 