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Composite oil reservoir anti-swelling and sand-inhibiting agent and preparation method thereof

A sand inhibitor and oil reservoir technology, applied in the directions of chemical instruments and methods, drilling compositions, etc., can solve problems such as inability to improve efficiency, inability to meet production needs, performance limitations of anti-swelling agents, etc., to prevent hydration Swelling, improving anti-swelling rate, with little effect on pH value

Inactive Publication Date: 2018-02-02
李军宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simple superimposed use can not improve the efficiency too much
Other properties of the anti-swelling agent are also limited, unable to meet the needs of production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: 20 parts of epichlorohydrin-trimethylamine polymer, 25 parts of cationic polyacrylamide, 30 parts of polydimethyldiallyl ammonium chloride, 37.5 parts of ammonium chloride, dibutyl phthalate 3.75 parts of ester, 2.25 parts of hydroxyethylethylenediamine, 1.5 parts of triethylenetetramine, 5 parts of graphite powder, 2 parts of methyl methacrylate, 5 parts of diethylene glycol butyl ether acetate, N-pentamethyl 2 parts of zinc dithiocarbamate-piperidine complex, 7 parts of titanate coupling agent.

Embodiment 2

[0016] Example 2: 25 parts of epichlorohydrin-trimethylamine polymer, 30 parts of cationic polyacrylamide, 20 parts of polydimethyldiallyl ammonium chloride, 37.5 parts of ammonium chloride, dibutyl phthalate 3.75 parts of ester, 2.75 parts of hydroxyethylethylenediamine, 1.0 part of triethylenetetramine, 8 parts of graphite powder, 4 parts of methyl methacrylate, 2 parts of diethylene glycol butyl ether acetate, N-pentamethyl 3 parts of zinc dithiocarbamate-piperidine complex, 10 parts of titanate coupling agent.

Embodiment 3

[0017] Example three: 30 parts of epichlorohydrin-trimethylamine polymer, 20 parts of cationic polyacrylamide, 25 parts of polydimethyldiallyl ammonium chloride, 37.5 parts of ammonium chloride, dibutyl phthalate 3.75 parts of ester, 2.5 parts of hydroxyethylethylenediamine, 1.25 parts of triethylenetetramine, 10 parts of graphite powder, 1 part of methyl methacrylate, 3 parts of diethylene glycol butyl ether acetate, N-pentamethyl 5 parts of zinc dithiocarbamate-piperidine complex, 5 parts of titanate coupling agent.

[0018] Composite oil reservoir anti-swelling and sand-inhibiting agent, the model of titanate coupling agent is KR-TTS, produced by Kenrich Petrochemical Company in the United States, or domestic JTW-101 (produced by Nanjing Jingtianwei Chemical Co., Ltd.).

[0019] The preparation method of compound anti-swelling and sand-inhibiting agent for oil reservoirs comprises the following steps: ① mixing epichlorohydrin-trimethylamine polymer, ammonium chloride, dibut...

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PUM

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Abstract

The invention relates to a compound oil deposit antiswelling and sand inhibiting agent and a preparation method thereof. The compound oil deposit antiswelling and sand inhibiting agent is prepared from the following raw materials in parts by weight: 20 to 30 parts of epoxy chloropropane-trimethylamine polymers, 20 to 30 parts of cationized polyacrylamide, 20 to 30 parts of poly-dimethyl diallyl ammonium chloride, 37.5 parts of ammonium chloride, 3.75 parts of dibutyl phthalate, 2.27 to 2.75 parts of hydroxyethyl ethylenediamine, 1.0 to 1.25 parts of triethylene tetramine, 5 to 10 parts of graphite powder, 1 to 4 parts of methyl methacrylate, 2 to 5 parts of biuret 2-butoxyethyl acetate, 2 to 5 parts of N-zinc pentamethylene dithiocarba-piperdine complex and 5 to 10 parts of titanate coupling agents. The compound oil deposit antiswelling and sand inhibiting agent is adsorbed on the surface of viscosity particles; a layer of protecting film is formed on the surface, so that the viscosity particles are effectively protected; clay particles are prevented from hydration swelling.

Description

technical field [0001] The invention belongs to the field of petroleum engineering, in particular to a compound anti-swelling and sand-inhibiting agent for oil reservoirs and a preparation method thereof. Background technique [0002] In unconsolidated sandstone formations, loose sand particles may enter the wellbore with the migration of oil and gas. If the flow rate of oil and gas is not enough to bring the sand particles to the ground, the sand particles will gradually accumulate in the wellbore, thereby hindering the flow of oil and gas into the wellbore, resulting in sand in the oil layer. Buried and sand plugged, the production of oil wells is greatly reduced or even shut down. Clay swelling can easily block the wellbore, cause stuck pipe, and cause instability of the wellbore wall. Anti-swelling agents are generally used to deal with the above problems. At present, most of the existing anti-swelling agents are single high-molecular cationic polymers, and the effect ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/528
CPCC09K8/035C09K8/528
Inventor 尹艳华王小娇左文婕李莎高烨宋广婷孙美增任芳赵丹瑞刘瑞娟
Owner 李军宁
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