Efficient-dehydration lost circulation additive

Abstract

The invention relates to an efficient-dehydration lost circulation additive, which comprises the following components in percentage by weight: 60%-70% of a main body material, 10%-15% of a filter aid, 3%-5% of a carbon fiber, 10%-15% of a suspending agent, 5%-8% of a bridge material and 1%-3% of a net fiber material. The raw materials are mixed evenly to form the efficient-dehydration lost circulation additive. The lost circulation additive has the characteristics of high loading capacity, good aging resistance, good plugging property and the like, can be aggravated by barite powder, and can be used for solving the problem of porous or fractured non-reservoir and reservoir losses.

Description

technical field

[0001] The invention relates to the technical field of oil drilling engineering plugging, in particular to a high-efficiency filter loss plugging agent. Background technique

[0002] Lost circulation is a complex downhole situation in which various working fluids flow into the formation under the action of pressure difference during various downhole operations such as drilling, cementing, testing or workover. The occurrence of lost circulation not only consumes drilling time and loss of drilling fluid, but also may cause a series of complex situations such as pipe sticking, blowout, and well collapse. In severe cases, the wellbore will be scrapped and cause major economic losses. The commonly used plugging material is bridging plugging material. The main disadvantage of bridging plugging materials is that it is difficult to reasonably match the particle size of the plugging agent with the pore throat diameter of the lost formation when the size of the underg...