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Flow regulating agent particles, flow regulating agent, and preparation method and application of flow regulating agent

A technology of flow regulating agent and particles, which is applied in chemical instruments and methods, mining fluids, earth drilling and mining, etc. It can solve the problems of small sweep volume and difficulty in deep stratum flow regulation, and achieve strong salinity resistance and expansion Effect of water flooding on swept volume and good temperature resistance

Active Publication Date: 2019-03-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a flow regulating agent in order to overcome the problems existing in the prior art of fracture-cavity reservoirs, especially for high-temperature and high-salt fracture-cavity reservoirs, which are difficult to realize deep formation flow regulation and small swept volume. Particles, flow regulators and their preparation methods and their application in the development of fractured-vuggy reservoirs

Method used

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  • Flow regulating agent particles, flow regulating agent, and preparation method and application of flow regulating agent
  • Flow regulating agent particles, flow regulating agent, and preparation method and application of flow regulating agent
  • Flow regulating agent particles, flow regulating agent, and preparation method and application of flow regulating agent

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preparation example Construction

[0054] In a third aspect, the present invention provides a method for preparing the above-mentioned flow regulator, the method comprising the following steps:

[0055] (1) Add viscoelastic main agent, selective co-solvent, density regulator, expansion agent, and optional toughening agent in sequence to mix, and obtain the mixture after fully stirring;

[0056] (2) extruding the mixture obtained in step (1) to obtain flow regulator particles;

[0057] (3) Mixing the flow regulating agent particles obtained in step (2) with the carrier liquid to obtain the flow regulating agent.

[0058] The inventors of the present invention found in the research that mixing the viscoelastic main agent, selective co-solvent, density modifier, expansion agent and optional toughening agent in the order of adding in order can further improve the final oil recovery. Yield and ability to seal cracks.

[0059] In the preparation method of the present invention, step (2) may also include shearing an...

Embodiment 1

[0083] (1) Add 60 parts by weight of polyethylene, 30 parts by weight of C5 petroleum resin, 2 parts by weight of fly ash, 5 parts by weight of anionic polyacrylamide, and 3 parts by weight of man-made chopped fibers, and fully stir and mix for later use;

[0084] (2) The temperature of the twin-screw extruder is raised to 160°C, and the mixed composite material is slowly poured into the twin-screw extruder for extrusion;

[0085] (3) Cut the extruded material to 1-2mm particles by using a mechanical shearer, and round them to obtain flow regulator particles. Various properties of the flow regulator particles were measured, and the results are shown in Table 1.

[0086] The density is 1.07g / cm 3 The carrier liquid and the flow regulator particles are mixed at a weight ratio of 80:20 to prepare the flow regulator, wherein, based on the total weight of the carrier liquid, the carrier liquid contains 0.1% by weight of hydroxysultaine, and also contains water and is used to adjus...

Embodiment 2

[0088] (1) Add 70 parts by weight of polystyrene, 20 parts by weight of C9 petroleum resin, 3 parts by weight of fly ash, 5 parts by weight of cross-linked carboxymethyl cellulose, and 2 parts by weight of man-made short-cut fiber, fully stir and mix for later use ;

[0089] (2) The temperature of the twin-screw extruder is raised to 180°C, and the mixed composite material is slowly poured into the twin-screw extruder for extrusion;

[0090] (3) Cut the extruded material to 2-3mm particles by using a mechanical shearing machine, and round them to obtain flow regulator particles. Various properties of the flow regulator particles were measured, and the results are shown in Table 1.

[0091] The density is 1.09g / cm 3 The carrier fluid and the flow regulator particles are mixed in a weight ratio of 80:20 to prepare the flow regulator (such as figure 1 shown), wherein, based on the total weight of the carrier liquid, the carrier liquid contains 0.1% by weight hydroxysultaine, a...

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Abstract

The invention relates to the field of petroleum exploitation, in particular to flow regulating agent particles, a flow regulating agent, a preparation method of the flow regulating agent, and application of the flow regulating agent particles and the flow regulating agent in development of fractured-vuggy reservoirs. The flow regulating agent particles comprise, by weight, 30-90% of viscoelastic main agents, 3-30% of selective auxiliary solvents, 0.1-30 parts of density adjusting agents, 1-30 parts of swelling agents and 0-10% of toughening agents. The flow regulating agent comprises the flowregulating agent particles and carrier liquid, and the carrier liquid comprises water and surfactants. The obtained flow regulating agent particles have high temperature resistance, adhesion propertyand swelling property, and can selectively adjust deep dominant water flow channels of stratums.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to a flow regulating agent particle, a flow regulating agent and a preparation method thereof and an application in the development of fracture-cavity oil reservoirs. Background technique [0002] The reservoirs of fractured-vuggy reservoirs are mostly pores, caves, and fractures. Caves and fractures are the main storage spaces of fractured-vuggy reservoirs. Fractures are the main channels connecting dissolved caves. The flow characteristics of formation fluids are far different from those of sandstones. In oil reservoirs, the remaining oil in the formation is rich, but the volume of the injected water is small, and the recovery factor is extremely low. [0003] At present, there are mainly three methods for regulating flow in fractured-vuggy reservoirs: one is gas injection (CO 2 or N 2 ) light fluid, to achieve the purpose of sweeping crude oil at high positions; one is to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508C09K8/516E21B33/13
CPCC09K8/5083C09K8/516E21B33/13C09K8/5045C09K8/5086C09K8/514C09K8/588C09K2208/08E21B33/138E21B43/16
Inventor 戴彩丽方吉超焦保雷钱贞何龙何晓庆赵光刘逸飞
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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