试油数据在估算致密砂砾岩储层渗透率中的应用

Application of oil test data in estimating permeability of tight glutenite reservoir

王鑫,张旭阳,黄长兵,汪康,顾明翔,吴伟

中国石油新疆油田分公司勘探开发研究院，新疆 克拉玛依 834000 中国石油新疆油田分公司百口泉采油厂，新疆 克拉玛依 834000 西南科技大学环境与资源学院，四川 绵阳 621000 中国石油集团测井有限公司测井应用研究院，陕西 西安 710000

利用试油数据估算渗透率是致密砂砾岩储层渗透性评价的新途径。试油、试井数据均能综合反映储层流体流动能力，其中由试井测得的试井流体系数本身就是渗透率的函数，但试井作业周期长、费用高，而试油资料较易获取。文中基于压裂试油获取的累计产液量、入井压裂液总量、压力等参数，构建了试油物性指数，进而开展试油物性指数与试井流动系数对比分析。结果显示：研究区试油物性指数和试井流动系数有较好的相关性，可以通过试油资料计算试井流动系数；根据试井流动系数理论计算公式，建立了以试油资料为基础的渗透率计算式，以达到渗透率估算的目的。经验证，利用该公式估算的致密砂砾岩储层渗透率与生产数据吻合较好。

It is a new way to estimate the permeability of tight glutenite reservoir by using oil test data. Oil test and well test data can comprehensively reflect the flow ability of reservoir fluid. The test fluid coefficient measured by well test itself is a function of permeability, but the well test operation cycle is long and the cost is high, and the oil test data is easy to obtain. Based on the parameters by fracturing test such as cumulative fluid production, total amount of fracturing fluid and pressure change, the physical property index of oil test is constructed, and the comparative analysis between the physical property index of oil test and the flow coefficient of well test is carried out. The results show that there is a good correlation between the physical property index of oil test and the well test flow coefficient in the study area, which can be used to calculate the well test flow coefficient from the oil test data. According to the theoretical calculation formula of well test flow coefficient, the permeability calculation formula based on oil test data is established to achieve the purpose of permeability estimation. After verification, the estimated permeability of tight glutenite reservoir is in good agreement with production data.

10.6056/dkyqt202202012