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Polystyrene butene diacid dimethyl ester and preparation method therefor and application thereof

A technology of polystyrene dimethyl butylene dioate and dimethyl butylene dioate, which is applied in construction and other fields, can solve the problems of large consumption, unsuitable for oil production, and few types of tracers, and achieve low consumption , the effect of high detection accuracy

Active Publication Date: 2015-11-25
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing tracers used in oil fields are all water-soluble tracers, and the types of tracers are small and the dosage is large, so they are not suitable for monitoring the oil production of each stage after multi-layer and multi-stage fracturing in horizontal wells

Method used

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  • Polystyrene butene diacid dimethyl ester and preparation method therefor and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The present embodiment provides a kind of preparation method of polystyrene dimethyl maleate, it comprises the following steps:

[0032] a. Dissolve 0.15g of polyethylene glycol (PEG4000) in 50g of hot water, raise the temperature to 65°C and keep the temperature for 30min to obtain an aqueous solution of polyethylene glycol;

[0033] b. Slowly add a mixed solution of 45g dimethyl maleate, 4.5g styrene and 0.85g azobisisobutyronitrile dropwise to the aqueous solution of polyethylene glycol at a rate of 5-10 drops / min , react for 10 hours after the dropwise addition, cool to room temperature and discharge to obtain polystyrene dimethyl maleate with a particle size of 0.425mm-0.850mm (20 mesh-40 mesh).

Embodiment 2

[0035] The present embodiment provides a kind of preparation method of polystyrene dimethyl maleate, it comprises the following steps:

[0036] a. Dissolve 0.18g of polyethylene glycol (PEG4000) into 60g of hot water, raise the temperature to 65°C and keep the temperature for 30min to obtain an aqueous solution of polyethylene glycol;

[0037] b. Slowly add a mixed solution of 35g dimethyl maleate, 3.5g styrene and 0.65g azobisisobutyronitrile dropwise to the aqueous solution of polyethylene glycol at a speed of 5-10 drops / min, After the dropwise addition, react for 10 hours, cool down to room temperature and discharge to obtain polystyrene dimethyl maleate with a particle size of 0.250 mm-0.600 mm (30 mesh-60 mesh).

Embodiment 3

[0039] The present embodiment provides a kind of preparation method of polystyrene dimethyl maleate, it comprises the following steps:

[0040] a. Dissolve 0.2 g of polyethylene glycol (PEG4000) in 70 g of hot water, raise the temperature to 65° C. and keep the temperature for 30 minutes to obtain an aqueous solution of polyethylene glycol;

[0041] b. Slowly add a mixed solution of 25g dimethyl maleate, 3g styrene and 0.45g azobisisobutyronitrile dropwise to the aqueous solution of polyethylene glycol at a rate of 5-10 drops / min, After the dropwise addition, react for 10 hours, cool to room temperature and discharge to obtain polystyrene dimethyl maleate with a particle size of 0.180mm-0.300mm (50 mesh-80 mesh).

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Abstract

The invention provides polystyrene butene diacid dimethyl ester and a preparation method therefor and application thereof. The preparation method comprises the step of carrying out polymerization reaction on styrene and butene diacid dimethyl ester, which serve as reaction monomers, in the presence of polyethylene glycol and azodiisobutyronitrile in a manner of taking water as a dispersion medium, thereby obtaining the polystyrene butene diacid dimethyl ester. The invention also provides the polystyrene butene diacid dimethyl ester prepared by the preparation method, application of the polystyrene butene diacid dimethyl ester in preparation of tracers for monitoring oil-producing profiles of horizontal wells and the polystyrene butene diacid dimethyl ester containing tracers for monitoring the oil-producing profiles of the horizontal wells. The polystyrene butene diacid dimethyl ester provided by the invention can be completely dissolved in crude oil, and by using the polystyrene butene diacid dimethyl ester to monitor the oil-producing situation of each segment after multistage fracturing of the horizontal wells, the aims of analyzing the oil-producing situation of each segment and drawing the liquid oil producing profile of each segment can be achieved.

Description

technical field [0001] The invention relates to polystyrene dimethyl butylene dioate and a preparation method and application thereof, belonging to the technical field of petroleum exploration and development. Background technique [0002] At present, in the process of oilfield exploration and development, horizontal wells are mostly used for exploration wells, and multi-layer and multi-stage fracturing is the preferred process for formation stimulation. However, in the process of layer selection, there is no specificity, and the layers are selected based on experience. Therefore, it is particularly important for data collection and analysis of fracturing effects after fracturing. In the existing technology, it is possible to monitor and analyze the development of fractures after fracturing by means of microseismic method, potential method, etc., and then know whether there is industrial oil flow in the reservoir through the flowback situation. There is no effective monitor...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F212/08E21B47/11
Inventor 郑猛张洪君王浩闫峰周飞何强郭韬张西子
Owner PETROCHINA CO LTD