Low-density foam resin sand preventing agent suitable for sand production horizontal well of unconsolidated sandstone reservoir and preparation method of low-density foam resin sand preventing agent

Abstract

The invention relates to a low-density foam resin sand preventing agent suitable for a sand production horizontal well of an unconsolidated sandstone reservoir and a preparation method of the low-density foam resin sand preventing agent. The low-density foam resin sand preventing agent is prepared from the following raw material components in percentage by weight: 97.1 to 98.85 percent of cementing agent, 0.3 to 0.8 percent of foaming agent, 0.7 to 1.3 percent of foam stabilizer, 0.05 to 0.5 percent of curing agent and 0.1 to 0.3 percent of coupling agent. The apparent density of the low-density foam resin sand preventing agent disclosed by the invention is 0.558 to 0.634g / cm<3>, and the low-density foam resin sand preventing agent can be uniformly injected into a heterogeneity stratum; the compressive strength of a system solidified rock core is 5.2 to 7.7MPa, and the permeability of the system solidified rock core is 1.1 to 3.5mu m<2>, so the low-density foam resin sand preventing agent can be applied to sand prevention of an ordinary vertical well, chemical sand control of a horizontal well, a highly-deviated well and irregular boreholes as well as secondary sand prevention after mechanical sand control is failed; besides, the low-density foam resin sand preventing agent is simple in preparation and construction process and wide in industrial raw material source, and can be well and widely applied to the field of chemical sand control of an oil-water well.

Description

technical field [0001] The invention relates to a low-density foam resin sand control agent suitable for sand production horizontal wells in unconsolidated sandstone reservoirs and a preparation method thereof, belonging to the technical field of oil field chemical sand control. Background technique [0002] At present, unconsolidated sandstone reservoirs in my country are widely distributed and have abundant reserves. Sand production in oil and gas wells is the main contradiction in the exploitation of this type of reservoir, which often leads to sand buried oil layers or wellbore sand plugging, and even causes oil and gas wells to stop production operations, which not only increases the cost of crude oil production, but also increases the difficulty of oilfield management. As the oilfield sand control technology continues to be perfected and matured, two major categories of chemical sand control and mechanical sand control have gradually formed. Among them, chemical sand c...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a low-density foam resin sand control agent suitable for sand production horizontal wells in unconsolidated sandstone reservoirs and its preparation method. The sand control agent overcomes the high density, low consolidation strength and high curing temperature of conventional chemical sand control systems question

Images