强非均质性碳酸盐岩气藏产能试井异常资料校正方法  

Correction method for abnormal data of deliverability testing in carbonate gas reservoirs with strong heterogeneity

作　　者：蔡珺君 张连进 刘微 张飞 毛正林 胡怡 周芳芳 唐洪 CAI Junjun;ZHANG Lianjin;LIU Wei;ZHANG Fei;MAO Zhenglin;HU Yi;ZHOU Fangfang;TANG Hong(Exploration and Development Research Institute,Southwest Oil&Gas Field Company,PetroChina,Chengdu 610041,China;Materials Branch,Southwest Oil&Gas Field Company,PetroChina,Chengdu 610031,China)

机构地区：[1]中国石油西南油气田公司勘探开发研究院,四川成都610041 [2]中国石油西南油气田公司物资分公司,四川成都610031

出　　处：《断块油气田》2025年第2期308-314,共7页Fault-Block Oil & Gas Field

基　　金：国家自然科学基金青年科学基金项目“分布式光纤温度监测水平井油水两相流产出剖面微温度影响机理”(51904254)。

摘　　要：针对四川盆地灯影组四段气藏产能试井测试异常问题,开展现场实测数据与岩心衰竭实验、碳酸盐岩气藏开发实践经验以及气井动态分析综合对比,判定测试资料异常的主要原因是储层的强非均质性。其机理为:强非均质性地质特征引起气井孔-洞-缝系统渗流不同步。渗流越同步,气井产能试井不同生产制度下的动态储量差异越小,测试数据和解释质量越高,反之亦然。通过引入生产压差流动因子α,建立了考虑α的气井产能方程校正方法,α能够表征强非均质性气藏孔-洞-缝系统小压差下渗流不同步、大压差下同步渗流的典型特征。应用文中方法对灯四段气藏11口测试异常井进行校正,建立了更加符合地质特征的产能方程。实例分析证实:文中方法对正确分析强非均质性气藏产能具有一定的矿场应用价值,可靠的产能评价结果将为正确认识气井动态、支撑气藏井网开发及开发规模、生产组织决策优化奠定坚实的基础。In response to the issue of abnormal deliverability testing in the fourth member of Dengying Formation gas reservoir in Sichuan Basin,comprehensive comparisons were conducted between on-site measured data,core depletion experiments,carbonate gas reservoir development experience and gas well dynamic analysis.It was determined that the main reason for the abnormal testing data was the strong heterogeneity of the reservoir.The mechanism is that the geological characteristics of strong heterogeneity causes asynchronous seepage in the pore-vug-fracture system of gas wells.The more synchronous the seepage,the smaller the dynamic reserve difference in gas well deliverability testing under different production systems and the higher the quality of test data and its interpretation,and vice versa.By introducing the drawdown pressure flow factorα,a correction method for gas well deliverability equation consideringαwas established.αcan characterize the typical characteristics of asynchronous seepage under small drawdown pressure and synchronous seepage under large drawdown pressure in pore-vug-fracture systems of strongly heterogeneous gas reservoirs.This method was applied to correct 11 abnormal testing wells in Deng 4 Member gas reservoir,and deliverability equations more in line with geological characteristics were established.Case analysis confirms that this method has certain field application value for correctly analyzing the gas well deliverability of strongly heterogeneous gas reservoirs.Reliable deliverability evaluation results will lay a solid foundation for correctly understanding gas well dynamics,supporting well pattern development of gas reservoirs and the development scale and optimizing production organization decisions.

关 键 词：生产压差流动因子 机理 强非均质性 异常 校正 矿场应用 

分 类 号：TE353[石油与天然气工程—油气田开发工程]