【作者】 程付启； 金强； 曹倩； 张水昌； 苏爱国； 朱光有；

【Author】 CHENG Fu-qi;JIN Qiang;CAO Qian;ZHANG Shui-chang;SU Ai-guo;ZHU Guang-you;Faculty of Natural Resources and Information Technology,Petroleum University of China;PetroChina Exploration & Development Research Institute;

【机构】 中国石油大学资信学院； 中国石油勘探开发研究院；

【摘要】 目的揭示三湖地区储盖层排替压力差与天然气富集程度的关系。方法利用实测数据建立砂、泥岩排替压力的测井计算模型,计算各储盖组合排替压力差并与相应储量、单储系数对比分析。结果各气田之间,储盖组合排替压力差普遍较大的涩北一号、涩北二号和台南气田天然气聚集量大;同一气田内,排替压力差较大的组合,天然气富集程度高。根据排替压力差与相应单储系数的分布特征,将排替压力差划分为大、中、小3个等级,分别为>2.0MPa,1.0~2.0MPa和<1.0MPa,对应的天然气富集度分别为高度、中等和不富集三级。察尔汗地区1 270 m以下组合排替压力差大于1.0MPa,存在天然气中等富集的储盖条件。结论储盖层排替压力差对三湖地区浅层天然气的分布具有明显的控制作用。更多还原

【Abstract】 Aim Elationship between the DPD(displacement pressure difference of reservoir and capping beds)and the distribution of natural gas accumulated in Sanhu Area has been found.Methods With testing data of displacement pressure of arenaceous and argillite rocks and corresponding log data,logging calculation models of displacement pressure for arenaceous and argillite rocks have been established.With these models,the DPD were gotten and compared with their corresponding reserves.Results To the 5 gas fields found in the studied area,natural gas mainly accumulated in those gas fields DPDs almost all are more than 1.0Mp,such as Sebei-1,Sebei-2 and Tainan gas fields.In one gas field,natural gas mainly accumulates in reservoirs with larger DPD.According to the DPD and the corresponding enrichment degree of natural gas,it could be classified into 3 grades;< 1.OMPa,1.0~2.OMPa,>2.OMPa,the corresponding enrichment degree of natural gas are high,common and low respectively.Conclusion The distribution of shallow natural gas in Sanhu Area is obviously controlled by the DPD.更多还原