Control circuit and method for multi-PVT fluid sampling

The invention discloses a control circuit and a control method for multi-PVT fluid sampling. The control circuit for multi-PVT fluid sampling comprises a power supply circuit, a main control circuit and a sampling tube control circuit, wherein the power supply circuit is used for supplying power to the main control circuit; the main control circuit is used for outputting a first control signal according to PVT sampling quality of a formation fluid, and the first control signal is used for controlling the sampling tube control circuit correspondingly; and the sampling tube control circuit comprises one or more groups of switch arrays, and the switch arrays control the opening and closing of corresponding PVT sampling tubes under the control of the first control signal. The control circuit and the control method for multi-PVT fluid sampling can realize the conduction of multi-PVT fluid sampling at one time in the well. 本发明公开了种多PVT流体取样的控制电路及方法，该多PVT流体取样的控制电路包括：电源电路，用于为主控电路供电；主控电路，用于根据地层流体的PVT取样质量输出对应控制取样筒控制电路的第控