Composition of a plugging agent and its application, and a method for plugging a hydrocarbon deposit

Abstract

A plugging agent composition and its use, and a method for plugging a hydrocarbon field are proposed. The plugging agent composition comprises a polymer latex and a stabilizer, wherein the stabilizer has a crosslinkable group and / or a linkable group; the crosslinkable group and / or linkable group in the stabilizer are(are) crosslinked or linked in the presence of a crack and / or leak point, such that the polymer latex coagulates and hardens. The plugging agent composition is an intelligent, pressure-sensitive lost circulation material that can quickly stop leaks as they occur and does not work until a leak occurs, and compared with the existing latex-based lost circulation material, there is no need to use metal cations for demulsification, And the composition of the plugging agent can penetrate into the cracks to plug, and the composition of the plugging agent can plug cracks of various sizes from nanometers to millimeters; thus, the plugging effect is excellent, and the application requirements in the field of plugging of hydrocarbon fields can be fully met.