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Sand prevention agent for achieving auto-aggregation of sand grains

A technology of sand control agent and sand particles, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of small action range and poor consolidation effect, and achieve the effect of improving sand consolidation strength and heat resistance

Active Publication Date: 2019-10-11
青岛大地新能源技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a sand control agent that realizes the self-aggregation of sand grains in order to solve the problem of poor consolidation effect and small action range of the sand control agent used in traditional chemical sand control. It can wrap the formation sand into groups and fix it at the corresponding position of the formation, significantly improve the consolidation effect, increase the scope of action, and also have a good sand consolidation effect on fine silt

Method used

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  • Sand prevention agent for achieving auto-aggregation of sand grains
  • Sand prevention agent for achieving auto-aggregation of sand grains
  • Sand prevention agent for achieving auto-aggregation of sand grains

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The sand control agent for realizing self-aggregation of sand particles includes three parts: self-aggregation liquid, self-aggregation aid and sand-fixing agent; wherein the self-aggregation liquid is an aqueous solution of sodium alginate with a mass concentration of 0.1%; the self-aggregation aid is copper chloride Aqueous solution with a mass concentration of 0.05%; the sand-fixing agent is epoxy resin and its curing agent system.

[0025] The mass ratio of the self-aggregation liquid, the self-aggregation aid and the sand-fixing agent is 1:2:0.5.

[0026] It is taken from the polycondensation liquid to wet the sand particles, and then the sand particles soaked in the blend are introduced into the self-agglomeration aid, and the self-agglomeration sand clusters can be formed instantly, and the sand consolidation agent is introduced into the sand clusters to achieve encapsulation on the self-coalescence sand clusters. After curing at a certain temperature, a sand mas...

Embodiment 2

[0028] The sand control agent for realizing self-aggregation of sand particles includes three parts: self-aggregation liquid, self-aggregation aid and sand-fixing agent; wherein the self-aggregation liquid is an aqueous sodium metasilicate solution with a mass concentration of 5%; the self-aggregation aid is chlorinated The zinc aqueous solution has a mass concentration of 10%; the sand-fixing agent is furan resin and its curing agent system.

[0029] The mass ratio of the self-aggregation liquid, the self-aggregation aid and the sand-fixing agent is 1:5:0.2.

[0030] The above three materials, through the pumping procedure of the actual construction on site, first use 0.5 ~ 0.8m 3 / min displacement into the self-polymerizing liquid, and then 0.8 ~ 1.0m 3 / min displacement into the self-aggregation aid, and finally 0.3 ~ 0.5m 3 The sand-consolidating agent is injected at a displacement of 1 / min, so that a better self-aggregation effect of sand clusters can be formed, and the...

Embodiment 3

[0032] The sand control agent for realizing self-aggregation of sand particles comprises three parts: self-aggregation liquid, self-aggregation aid and sand-fixing agent; wherein the self-aggregation liquid is an aqueous solution of carrageenan with a mass concentration of 3%; the self-aggregation aid is an aqueous solution of cobalt sulfate, The mass concentration is 1.2%; the sand-fixing agent is phenolic resin and its curing agent system.

[0033] The mass ratio of the self-aggregation liquid, the self-aggregation aid and the sand-fixing agent is 1:5:0.3.

[0034] The sand control agent described in this example is applied to a vertical well in a tight sandstone gas reservoir, where the formation temperature is 120°C and the sunrise sand is 1.67m 3 / d, 2012.7.30-2012.8.3 metal wool sand filter pipe for sand control, the pump is mixed with water and put into production; 2013.10.15-11.2 high pressure filling 3 ); 2014.6.28-2014.7.20 plugging, layered ground filling + screen ...

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Abstract

The invention belongs to the technical field of petroleum development, and particularly relates to a sand prevention agent for achieving auto-aggregation of sand grains. The sand prevention agent comprises three parts including an auto-aggregation liquid, an auto-aggregation auxiliary agent and a sand consolidation agent. Main ingredients of the auto-aggregation liquid are natural polysaccharide compounds, and main ingredients of the auto-aggregation auxiliary agent are inorganic salt. The sand prevention agent achieves auto-aggregation of the sand grains through the synergistic effect among chemical agents of the sand prevention agent, the stratum sand grains can be packaged and clustered to be fixed to corresponding positions of the stratum, the consolidation effect is obviously improved, the actuating range is expanded, and a good sand consolidation effect can be achieved on fine-powder sand.

Description

technical field [0001] The invention belongs to the technical field of petroleum development, and in particular relates to a sand control agent for realizing self-aggregation of sand grains. Background technique [0002] In recent years, the exploitation degree of most domestic oil fields has been continuously deepened, resulting in a rapid decline in formation energy, resulting in serious sand production in oil wells, which in turn seriously restricts the daily normal production of oil fields, so sand control work is imminent. At present, composite sand control is mainly used, wherein chemical sand control mainly adopts coated sand for sand control, and field application has achieved certain results, such as the large-scale use of high-strength and high-permeability chemical sand control agents described in CN104650840B in oil fields, and many new materials and sand control technologies. It has gradually been promoted and used at the construction site. [0003] However, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/575C09K8/57
CPCC09K8/572C09K8/5758
Inventor 史胜龙张殿印温庆志张东晓
Owner 青岛大地新能源技术研究院
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