Abstract: Triplemedium reservoir which include Matrix, cavern and fracture were very common in carbonatite reservoir bed. In this articlewe use Warrant otmathematic modal to establish the mathematicmodal for flow in porousmedia of triplemedium reservoir. We used such theory as Lord Kelvin point source soluion, integral property of Bessel function, poisson′summation ormula to obtain the dimensionless pressure ofhorizontalwell in triplemedium reservoir in laplace domain. We obtained the type curve ofdimensionless pressure response in bottom hole. Andwe also have analyzed the influence of those factors to pressure response ofhorizontalwell in triplemedium reservoir.

Key words: horizontalwel, l triple medium reservoir, influence factors, character of flow in porousmedia