Leak plugging agent applied to exploration and development of petroleum and natural gas

Abstract

The invention discloses a leak plugging agent applied to the exploration and development of petroleum and natural gas. The leak plugging agent comprises the following components in percentage by weight: 2.0 percent of 2-methyl-2-acrylamidopropanesulfonic acid, 4.0 percent of acrylic acid, 14.0 percent of acrylamide, 78.0 percent of water and 2.0 percent of initiator and cross-linking agent in a mass ratio of 1:1-1:3. The reaction time is short; the water absorbency and the expansion rate of the leak plugging agent are improved; the plugging rate is high; the loading capacity is high; and the leak plugging effect in the exploration and development process of the petroleum and the natural gas is obviously improved.

Description

technical field [0001] The invention relates to a leak-stopping agent, in particular to a leak-stopping agent used in oil and natural gas exploration and development. Background technique [0002] In order to improve drilling efficiency, reduce operating time and loss of working fluids such as mud, and reduce damage to reservoirs to obtain maximum economic benefits, the emergence of plugging while drilling provides a way to solve this problem. It is in It is a plugging technology of plugging while drilling in drilling engineering. [0003] Lost circulation agent while drilling is a new type of lost circulation agent developed at home and abroad in recent years with good application effect. At present, there is 801 plugging agent while drilling, which is made of wood shavings (a kind of wood containing vegetable glue after crushing, which contains cellulose, lignin, polypentose, etc.), humate, carboxymethyl It is a powder product made of cellulose and other polymer compound...

AI Technical Summary

Problems solved by technology

However, these methods have not solved the fundamental problem of lost circulation, mainly due to poor pressure bearing capacity

The reason is that the particle size distribution of the conventional plugging agent is unreasonable, the shape of the particles does not match well with the shape of the plugged fractures and channels, and the lack of force extending into the well wall greatly reduces the plugging efficiency