Fiber Downhole Temperature High-pressure Test System Design

Aim at high pressure high temperature well practice engineering question in field development engineering,especially CNPC southwest oil gas branch gas recovery academy project's concretion demand,based upon in existence measuring and testing techniques foundation,the dissertation produce a sort of new optical fiber downhole high pressure high temperature test system, and finish downhole fibre optic pressure sensor's design. The sensor satisfaction downhole temperature 300℃, test pressure 120MPa.It produce general planning of fibre optic pressure sensor design, established pressure signal measuring mathematic model, deduce lights numerical aperture in bent optical fiber,analyses some kind of photoelectric detection mode.It expound characterization of optical fiber illuminating source and light detector, exhaustively analyse of illuminating source-optical fiber, light detector-fiber optical and fiber optica-fiber optic. Exhaustion homodyne deletion technique , and analyses initiative homodyne deletion technique, passive homodyne deletion technique. Finally finish's physical design and elastic tube's strength analysis.The design project base upon the dissertation should offering a sort of significant means for the future to special high pressure high temperature oil and gas well testing.