利用试井双对数曲线计算缝洞型油藏动态储量的方法

Method for Calculating Dynamic Reserves of Fracture-Cavity Reservoirs by Using Double Logarithmic Curve of Well Test

摘要: 缝洞型油藏非均质性强，缝洞组合关系复杂，很难识别其储集空间类型和规模，常规储量计算方法无法准确反映出缝洞型油藏的储量大小及其分布。本文在静态地质资料的基础上，充分结合油井生产动态资料，建立了一套适合缝洞型油藏的动态储量计算方法。该方法利用试井双对数曲线能反映缝洞发育特征和油井生产动态特征的优势，通过图版拟合识别出储集体大小，进一步得到动态储量。计算结果是综合应用静态资料和动态资料得出来的，更加符合缝洞型油藏实际，这对缝洞型油藏在不同开发阶段中的技术政策调整有重要指导意义。

Abstract: The strong heterogeneity and complex combination of Fracture-cavity reservoirs make it diffi-cult to identify the type and size of their storage spaces. The conventional reserve calculation methods cannot accurately reflect the reserves and distribution of fracture-cavity reservoirs. Based on the static geological data and fully combined with the production data of oil wells, a dynamic reserve calculation method suitable for fracture-cavity reservoirs is established in this paper. This method takes advantage of the double logarithmic curve of welltest to reflect the characteristics of fracture and vug development and the dynamic characteristics of oil well pro-duction. The size of the reservoir body is identified through plot matching, and further dynamic reserves are obtained. The calculation results are obtained by comprehensively using static and dynamic data, which is more in line with the actual conditions of fracture-cavity reservoirs. This is of significant meaning to adjust technical policy of fracture-cavity reservoirs in different de-velopment stages.