Well wall reinforcing material and preparing method thereof

Abstract

The invention relates to the technical field of petroleum drilling engineering, in particular to a well wall reinforcing material. The raw materials of the well wall reinforcing material comprise a seal material, a reinforcing material and a support material. The well wall reinforcing material is prepared by the following method: as long as the seal material, reinforcing material and support material are uniformly mixed according to the required quantities, the well wall reinforcing material is obtained. Besides the excellent performance of the conventional comprehensive blocking agent, the well wall reinforcing material has higher blocking strength and smaller blocking depth, and has better blocking performance and larger capability of keeping the stability of a well wall. The well wall reinforcing material can greatly widen the safety density window of drilling fluid, provides a better guarantee for rapid and safe well drilling, and can effectively lower leakage preventing and blocking costs.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling engineering, and belongs to the technical field of well wall reinforcement materials. Background technique [0002] Wellbore reinforcement technology is to seal and strengthen the unstable formations drilled by adopting special drilling fluid pretreatment technology after drilling through some unstable formations to ensure safe drilling in the next stage. The stability performance and pressure bearing capacity are significantly improved, thereby widening the safe density (pressure) window and reducing the difficulty of drilling in complex formations below. The well wall reinforcement material used in the commonly used well wall reinforcement technology at present is comprehensive lost circulation agent, but in the process of well wall reinforcement using comprehensive lost circulation agent, the plugging strength is insufficient and the plugging depth is large, and the commonly used Du...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a well wall reinforcement material and its preparation method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of using comprehensive plugging agents at present. In the process of wellbore reinforcement technology, there are problems such as low plugging strength, large plugging depth, and most materials cannot pass through the drilling fluid solid control equipment, which is easy to cause waste