Experimental technique for marine hydrates is essential and important for gas hydrates research. The characteristics of recent experimental techniques in the world are in visible state, high precision and many detection methods. A set of new experimental apparatus for marine gas hydrates has established in Qingdao Institute of Marine Geology（QIMG）in 2001 with the support of China Geological Survey (CGS) and the National High Technology Research and Development Program of China (863 Program).

　　The apparatus of QIMG can simulate marine bottom conditions including pressure (up to 30MPa), temperature and sedimentary species in accordance with the geological conditions of the China seas, The apparatus is visible and it has several detection methods including light intensity, P-wave and electrical resistivity.

　　We have successfully synthesized and lighted methane hydrate in the laboratory of QIMG. We measured the synthesized methane gas hydrates and the dissociation conditions in pure water through the changes of light intensity, and gained a satisfactory phase equilibrium diagram, which proves the apparatus is feasible and accurate. We have applied ourselves to research the change of P-wave during experiments with sediments, the waveforms remain almost unchanged when there is a little gas hydrate formed in the pore water of sediments. The resistance electrode was just installed and only some primary experiment results was gained, the resistance changes mainly along with the temperature and comparatively changes very little when gas hydrate formation.

　　Measurement of gas hydrate in sediments is difficult and important for marine gas hydrates research. We are planning to apply some more effective detection methods such as TDR and thermal conductivity in our lab.

　　The selection of E value is very important to the calculation of methane amount in gas hydrate of the world. We have built another set of apparatus to determinate the E value of gas hydrate. The experimental E value is about 0.5-0.6 when pressure is 10 MPa through our primary experiments.