Predicting models for gas-oil ratio of reservoir oil, which were put forward by Standing, Lasater, and Vasquez-Beggs respectively, have been verified by the PVT parameters of oil from 30 exploration wells in Daqing Oilfield.

TUHA oil field has been putting into production in 1991, with the development of TUHA oil field,the reservoir pressure is dropping off,the gas oil ratio(GOR) is quickly rising.

Using optimization principle to calculate the contents of condensate oil and condendate gas separately in an condition of reservoir,the paper calculated the gas oil ratio on surface from above results.

On basis of these contents the gas-oil ratio on surface can be calculated,so the reservoir type is e.

The viscosity of the oil-gas mixture with different gas-oil ratios was measured.

Many factors such as components,gas-oil ratio (GOR) and non-equilibrium effect have some affects on dew point pressure of con-densate gas.

Factors to control GOR and its exploration implications in Bozhong depression,Bohai Bay basin;

This paper presents the all-around investigation and analysis of production status, production capability and production level of associated gas in major fields of Tuha region, of which many methods are used to study the variation of associated gas and relations of production GOR to pressure and water cut, etc.

Affected by overlying high pressure oil-gas beds and organic additive, the higher total hydrocarbon background values would often appeared in gas logging, the appearance of which not only annihilated low GOR oil bed shows, but also produced some false anomaly, so bring many difficulties to interpretation and evaluation job.