水溶性ガス層に対する泥水の浸入

抄録

Results of a study on the invasion of mud fluid into gas-dissolved water zone tested by the use of artificial consolidated sands are described in this paper. Some of the results obtained are as follows: (1) when water pressure is low, a mud cake interrupts flow of water, (2) more mud fluid invades into a sand of higher permeability, (3) therefore, the degree of reduction of water permeability is conspicuous in a sand of higher permeability, and (4) when water pressure is high, invasion of mud fluid affects little upon the water permeability.