INFLUENCE OF DRILLING FLUID ADDITIVE ON ELECTRICAL PROPERTY AND INHIBITION

Drilling fluid is the first external fluid which contacts the hydrocarbon reservoir and often invades the reservoir more or less under the certain pressure. If filtrate of drilling fluid is not compatible with the reservoir, that is very possible to cause the clay expanding, water blocking, emulsification and chemical flocculation sedimentation, resulting in reservoir harm. Through the research on the influence of treating agent on the clay particle electrical property and the hydrated characteristic,this article analyzed the relations between clay particle electrical property and the hydrated suppression. And the results can be used in instructing the development or the optimization of drilling fluid treating agent. The paper analyzed action mechanism of treating agent and established the new suppression evaluation method.