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Expandable biopolymer temporary plug profile control agent and preparation method thereof

A biopolymer and expandable technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as low cost control, and achieve high temperature resistance, high plugging strength, and plugging. high rate effect

Inactive Publication Date: 2016-06-08
张向南
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In summary, the temporary plugging profile control agent used in heavy oil steam injection wells needs to withstand high temperature, high humidity, high pressure and different salinity conditions at the same time to achieve high plugging rate, high strength, and self-plugging removal effect. And the cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0066]Example 1:

[0067] Recipe (by weight percentage, unit kg)

[0068] PLA (weight average molecular weight 120000) 16%, wood flour (80 mesh) 30%, rice husk flour (80 mesh) 45%, calcium carbonate (3000 mesh) 2%, LDPE4.5%, ACR1.5%, AC0. 45%, ADR4370S0.05%, DCP0.05%, vinyltriethoxysilane 0.15%, carbodiimide 0.1%, silane coupling agent (KH550) 0.02%, EBS0.04%, oxidized polyethylene wax 0.05 %, calcium stearate 0.05%, hindered phenol (1010) 0.02%, phosphite (168) 0.04%, polyacrylamide 0.03%.

[0069] The expandable biopolymer temporary plugging profile control agent of Example 1 of the present invention can be prepared by a twin-screw extruder mixing method, and the specific steps are as follows:

[0070] Raw material pretreatment: PLA is dried at 100°C for 4 hours, then cooled to below 50°C for use, and calcium carbonate is mixed at a high speed of 110°C for 3 minutes, then added with silane coupling agent (KH550), and then mixed at high speed 3 to 5 minutes, and then the m...

Example Embodiment

[0082] Example 2:

[0083] Recipe (by weight percentage, unit kg)

[0084] PLA (weight average molecular weight 120000) 8%, PBAT0.5%, wood flour (80 mesh) 85%, talc (3000 mesh) 3%, EVA2%, ACR0.8%, AC0.2%, ADR4370S0.05% , DCP0.05%, diacrylic acid-1,4-butanediol 0.15%, carbodiimide 0.1%, silane coupling agent (KH550) 0.02%, EBS0.02%, oxidized polyethylene wax 0.02%, stearin Calcium acid 0.04%, hindered phenol (1010) 0.01%, phosphite (168) 0.02%, polyacrylamide 0.02%.

[0085] The expandable biopolymer temporary plugging profile control agent of Example 2 of the present invention can be prepared by a twin-screw extruder kneading method, and the specific steps are as follows:

[0086] Raw material pretreatment: Dry PLA and PBAT at 100℃ and 70℃ for 4 hours respectively, then cool to below 50℃ for later use. Add silane coupling agent to talcum powder in a high-speed mixer at 110℃ for 3 minutes after high-speed mixing. (KH550), then mix at high speed for 3 to 5 minutes, and then c...

Example Embodiment

[0098] Example 3:

[0099] Recipe (by weight percentage, unit kg)

[0100] PLA (weight average molecular weight 120000) 30%, rice husk powder (80 mesh) 60%, talc (3000 mesh) 5%, EVA4%, ACR0.3%, AC0.3%, ADR4370S0.03%, DCP0.03 %, vinyl triethoxysilane 0.1%, carbodiimide 0.05%, silane coupling agent (KH550) 0.05%, EBS 0.02%, oxidized polyethylene wax 0.02%, calcium stearate 0.05%, hindered phenol (1010) 0.01%, phosphite (168) 0.02%, polyacrylamide 0.02%.

[0101] The expandable biopolymer temporary plugging profile control agent of Example 3 of the present invention can be prepared by a twin-screw extruder kneading method, and the specific steps are as follows:

[0102] Raw material pretreatment: PLA was dried at 80°C for 4 hours, then cooled to below 50°C for use, talcum powder was mixed at a high speed of 110°C for 3 minutes, then silane coupling agent (KH550) was added, and then mixed at a high speed 3 to 5 minutes, and then the material is cooled to below 50 °C for later u...

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PUM

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Abstract

The invention discloses an expandable biopolymer temporary plug profile control agent and a preparation method thereof. The expandable biopolymer temporary plug profile control agent is mainly prepared from biodegradation polymer, a reinforcing agent, a toughening agent, a foaming agent, a crosslinking agent, a water blocking agent, a coupling agent, a functional auxiliary and a carrying agent, and can be prepared through a double-screw extruder mixing method and a mixer mixing method under certain process conditions. The prepared expandable biopolymer temporary plug profile control agent is low in carbon, environmentally friendly, expandable, resistant to high temperature, high in plugging ratio, large in plugging strength, capable of achieving the self-plug-removal function, free of toxicity and pollution to stratums, low in cost and convenient to construct, and has very high economic value and broad market prospects.

Description

technical field [0001] The invention relates to a temporary plugging profile control agent for petroleum development, which is characterized in that it uses biopolymers to invent a low-carbon, environmentally friendly and completely degradable performance that is expandable, high temperature resistant, high plugging rate, high plugging strength, A temporary plugging profile control agent with self-blocking removal function and a preparation method thereof. Background technique [0002] In the middle and late stages of oil production, with the increase of oil well throughput, the conflict of steam and water channeling between wells is prominent, which seriously affects the efficiency of heavy oil development. Heavy oil reservoirs are characterized by weak compaction, loose cementation, large pores and high permeability, and serious formation heterogeneity. , resulting in uneven steam absorption in the oil layer, and the injected high-temperature steam tends to rise to the to...

Claims

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Application Information

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IPC IPC(8): C09K8/512
CPCC09K8/512C09K8/5045
Inventor 张向南
Owner 张向南
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