Plugging filler

Abstract

The invention discloses a TRS-DFJC plugging filler comprising the following components in parts by weight: 10-15 parts of quartz powder, 10-20 parts of calcium silicate, 15-25 parts of oil-soluble resin, 1-3 parts of starch, 20-30 parts of rubber granules, 10-15 parts of asphalt powder, 20-30 parts of calcium carbonate and 0.1-0.3 part of biopolymers. The substances are sequentially added into a vessel by using a conventional preparation method at normal temperature and normal pressure according to the components and contents, uniformly mixed and stirred and smashed into a granular product with the size of 0.05-0.8mm after being dried. The TRS-DFJC plugging filler has the characteristics of wide raw material source, scientific and simple process, construction safety, good filling effect, high plugging rate and high plugging success rate, is widely applied to petroleum and geological drilling processes and is particularly suitable for application in fractured hard formations and cavernous formations.

Description

technical field [0001] The invention relates to a drilling plugging agent, in particular to a plugging agent. Background technique [0002] The conventional plugging agents used in oil drilling generally use walnut shells, shell powder, mica, chaff, etc. as plugging fillers. These plugging fillers have played a role in oil drilling operations, but at the same time there are the following shortcomings or deficiencies : ① Fillers are completely plugged by physical filling, the filling effect is poor, and there is no coagulation; ② These fillers are used in large amounts and are easy to seal. Difficult to mix slurry, poor fluidity, easy to seal in the leaking crack channel, poor filling and sealing effect, and cannot enter the deep part of the leaking layer; ③ When increasing the amount of filler, sometimes the plugging slurry enters the deep part of the crack and channel, but due to The plugging slurry is not coagulable, and re-leakage occurs when the pump cycle pressure is e...

AI Technical Summary

Problems solved by technology

[0002] The conventional plugging agents used in oil drilling generally use walnut shells, shell powder, mica, chaff, etc. as plugging fillers. These plugging fillers have played a role in oil drilling operations, but at the same time there are the following shortcomings or deficiencies : ① Fillers are completely plugged by physical filling, the filling effect is poor, and there is no coagulation; ② These fillers are used in large amounts and are easy to seal. Difficult to mix slurry, poor fluidity, easy to seal in the leaking crack channel, poor filling and sealing effect, and cannot enter the deep part of the leaking layer; ③ When increasing the amount of filler, sometimes the plugging slurry enters the deep part of the crack and channel, but due to The plugging slurry is not coagulable, and re-leakage occurs when the pump cycle pressure is excited, resulting in repeated plugging, and the plugging effect is poor; ④The consumption of plugging materials is large, the plugging time is long, and the cost of plugging is high; ⑤Filling The performance of the filler is single, relying on physical blockage, and repeated leakage is prone to occur; ⑥The compound application of these fillers has a slight plugging effect on the permeability loss. Continuous construction will fail to achieve plugging effect, which will easily cause downhole accidents