The reservoir information from flow response on condition of stable bottomholepressure helps to determine reservoir information.
定井底流压下流量响应所反应出的油藏信息，有助于确定油藏参数。
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Under the conditions of constant pressure boundary, when the time approaches to infinity, the curve between the flow rate and the bottomholepressure is so called conventional IPR curve.
In order to explore the effect of ambient pressure on jet flow field in deep well and ultra-deep well, a physical model for flow field of confined water jet at bottomhole was established.