Abstract:

Two methods to identify gas zone are presented in the paper, one is called DEN-CNL curves enveloping inter-zone, the other is named porosity overlapped, they are all used successfully in the interpretation of 40 wells' logging data in Su-6 area. The paper gives a lot of examples and explicates how to use the methods to identify different hydrocarbon, such as gas zone, water zone, gas-water zone or non-production zone. The advantages of using this method to evaluae reservoir Sulemiaorea is that it can distinguish low-resistivity from water zone efficiently. This technology is proved effective by well test data.

Key words: magma intrusion, superheated temperature, organic matter evolution, hydrocarbon-generating patterns