摘要
塔里木盆地库车坳陷的S气井所在气藏表现为超高压低孔低渗砂岩凝析气藏特征,现场关井测试时间较短,导致未出现径向流或边界特征,采用常规试井解释方法进行不稳定试井资料的解释时呈现多解性。因此,针对该井历次测试中的压力恢复数据,对比分析"直井+有限导流+均质+矩形封闭边界"模型和"直井+有限导流+均质+平行封闭边界"模型常规试井解释的全程压力史拟合结果发现,选用"直井+有限导流+均质+矩形封闭边界"模型对历次压力恢复双对数特征曲线及压力历史拟合较好,与反褶积试井解释结果所表现出的全封闭边界特征吻合。结果表明,反褶积试井综合了多次压力恢复测试及生产数据,获取了比单次压力恢复常规试井更多、更全的边界信息,能更好地拟合整个生产历史,提高了试井解释结果的准确性和工作效率,对低渗透油气藏的不稳定试井解释具有指导意义。
Well S is a wildcat well drilled on the Ilac Structure of Wushi Sag in Kuqa Depression of the Tarim basin,to develop the condensate sandstone gas reservoirs with ultra-high pressure,low porosity and low permeability.The ambiguity of interpretation for well testing using conventional interpretation method exists because of lack of radial flow phase or boundary information due to the short testing period.Therefore,for the three intervals of the pressure build-up test available,the"vertical well+finite conductivity+homogeneity+parallel boundary"model and"vertical well+finite conductivity+homogeneity+rectangular boundary"model were used to interpret these data.After analyzing the matching results of the full-course production history of the gas well of these two methods,it was found that the conventional well testing technique together with the"vertical well+finite conductivity+homogeneity+rectangular boundary"model was used for repeated tests to realize satisfactory matching for log-log curves and pressure history,which is in accordance with the entire was used for interpretation.The results show that the deconvolution testing technique can integrate multiple pressure buildup test data and production data to provide richer information related to boundaries,so as to achieve accurately and satisfactory matching of production history.This method can cover the shortages of conventional well testing technique and provide suggestions for well testing interpretation of low-permeability reservoirs.
作者
魏聪
陈宝新
刘敏
李海明
张建业
仝可佳
WEI Cong;CHEN Baoxin;LIU Min;LI Haiming;ZHANG Jianye;TONG Kejia(Exploration and Development Research Institute,PetroChina Tarim Oilfield Company,Korla,Xinjiang 841000,China)
出处
《油气井测试》
2018年第1期73-78,共6页
Well Testing
基金
国家重大专项“库车坳陷深层-超深层天然气田开发示范工程”(2016ZX05051004)、“复杂天然气开发关键技术”(2016ZX05015006-004)
关键词
低孔低渗气藏
高压井
反褶积试井
双对数曲线
油藏边界
压力历史拟合
压力恢复曲线
径向流
low porosity and low permeability
high pressure well
deconvolution well testing
log-log curve
boundary information
pressure historical matching
pressure build-up curve
radial flow
