顺北超深断溶体储层典型试井曲线特征及类别OA北大核心CSTPCD

Fractures and sheet cave mainly develop in the ultra-deep and fault-controlled formation in Shunbei region.Horizon-tal well is adopted in this region to exploit the oil and gas because horizontal well can transversely pass through the fractured-caved formation.The well-test curves are complex and various.According to the middle curve characteristics after the wellbore storage and skin effects,the real well-test curves of Shunbei Region can be divided into 3 categories.The curve characteristics of the 3 categories can directly reflect the different contact relationship of horizontal well with fractures and caves.In addition,according to the late curve characteristics,the 3 categories can be further divided into 9 subcategories.The curve characteristics of the 9 subcategories differ each other and reflect different development status of fractures and caves in the periphery of hori-zontal well.At the end,the physical models of 3 categories and 9 subcategories,which are corresponding to the real well-test curves of 3 categories and 9 subcategories,are presented for well-test interpretations and evaluations.The research results in this article can be used to guide the work of well-test analysis and study for Shunbei region,and can also be used to guide the work of well-test study for other deep and fault-controlled formations.