PLUGGING AGENT FOR IMPROVING FORMATION PRESSURE BEARING CAPACITY, AND METHOD FOR PREPARING SAME

摘要

The present invention relates to the field of agents for oil and gas wells, and discloses a plugging agent for improving the formation pressure bearing capacity, and a method for preparing same, wherein the plugging agent contains water, bridging particles, filling particles and a cementing material; and by taking 100 parts by weight of water as a reference, the content of the bridging particles is 3-15 parts by weight, the content of the filling particles is 5-23 parts by weight, and the content of the cementing material is 4-11 parts by weight. The plugging agent involved in the present invention can improve the formation pressure bearing capacity during well drilling plugging, is applicable to a shielded temporary plugging technology against serious leakage during ultra-deep well drilling, has an efficient and quick plugging performance, and is especially applicable to a serious leakage situation in the formation where the well depth is greater than 3,000 meters and conventional plugging agents cannot produce an effect.