Hydrocarbon reservoir water shutoff and profile control agent for heterogeneous fracture development

A technology of water profile control agent and fracture development, which is applied in the field of water plugging profile control agent and oil and gas layer water plugging profile control agent, and can solve the problems of poor water plugging effect

Inactive Publication Date: 2021-07-06
陕西林荣桓业能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the purposes of the present invention is to solve the problem that existing water plugging and profile control agents have poor water plugging effects on heterogeneous fractures with large channels and large pores

Method used

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  • Hydrocarbon reservoir water shutoff and profile control agent for heterogeneous fracture development
  • Hydrocarbon reservoir water shutoff and profile control agent for heterogeneous fracture development

Examples

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Effect test

Embodiment 1

[0060] A method for preparing a water plugging profile control agent for oil and gas reservoirs used for the development of heterogeneous fractures.

[0061] In terms of mass percentage, the raw material components of the water plugging profile control agent of the present invention include the following raw material components:

[0062] Vegetable gum 7.5%;

[0063] AM / DAC binary copolymer 0.12%;

[0064] Aluminum sol 0.26%;

[0065] Organic boron 0.5%;

[0066] Hexamethylenetetramine 2%;

[0067] Water 89.62%.

[0068] Weigh each component with the above mass percentage and prepare according to the following steps:

[0069] Step 1: First add 75kg of vegetable gum to the reaction kettle, slowly add 1.2kg of AM / DAC binary copolymer, and fully stir for 30min to obtain the strained component of the present invention, which is counted as mixture C;

[0070] Step 2: Add 896.2kg of water into the reaction kettle, add 2.6kg of aluminum sol, 5kg of organoboron, and 20kg of hexam...

Embodiment 2

[0074] A method for preparing a water plugging profile control agent for oil and gas reservoirs used for the development of heterogeneous fractures.

[0075] In terms of mass percentage, the raw material components of the water plugging profile control agent of the present invention include the following raw material components:

[0076] Vegetable gum 5%;

[0077] AM / DAC binary copolymer 0.1%;

[0078] Aluminum sol 0.2%;

[0079] Organic boron 0.3%;

[0080] Hexamethylenetetramine 1%;

[0081] Water 94.4%.

[0082] Weigh each component with the above mass percentage and prepare according to the following steps:

[0083] Step 1: First add 50kg of vegetable gum into the reaction kettle, slowly add 1kg of AM / DAC binary copolymer, and fully stir for 30min to obtain the strained component of the present invention, which is counted as mixture C;

[0084] Step 2: Add 944kg of water into the reaction kettle, add 2kg of aluminum sol, 3kg of organoboron, and 10kg of hexamethylenet...

Embodiment 3

[0088] A method for preparing a water plugging profile control agent for oil and gas reservoirs used for the development of heterogeneous fractures.

[0089] In terms of mass percentage, the raw material components of the water plugging profile control agent of the present invention include the following raw material components:

[0090] vegetable gum 10%;

[0091] AM / DAC binary copolymer 0.125%;

[0092] Aluminum sol 0.3%;

[0093] Organic boron 0.6%;

[0094] Hexamethylenetetramine 3%;

[0095] Water 85.975%.

[0096] Weigh each component with the above mass percentage and prepare according to the following steps:

[0097] Step 1: First, add 100kg of vegetable gum into the reaction kettle, slowly add 1.25kg of AM / DAC binary copolymer, and fully stir for 30min to obtain the strained component of the present invention, which is counted as mixture C;

[0098] Step 2: Add 859.75kg of water into the reaction kettle, add 3kg of aluminum sol, 6kg of organoboron, and 30kg of h...

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Abstract

The invention provides a hydrocarbon reservoir water shutoff and profile control agent for heterogeneous fracture development. The water shutoff and profile control agent comprises, by mass, 5 to 10 percent of a strain component, 0.2 to 0.3 percent of a retarding component, 0.3 to 0.6 percent of a crosslinking component, 1 to 3 percent of a curing enhancing component, and the balance of a carrier. The preparation method is simple and easy to operate, has the performance characteristics of safety, no pollution, low viscosity, high salt resistance, scouring resistance, stable gelling and the like, and is suitable for large-pore and large-pore heterogeneous cracks.

Description

technical field [0001] The invention relates to the technical field of oil field exploitation, and relates to a water plugging profile control agent, in particular to a water plugging profile control agent used for the development of heterogeneous fractures in oil and gas layers. Background technique [0002] At present, most oil and gas fields in China have gradually entered the stage of water injection development. However, due to the complexity of reservoir geological structure and the heterogeneity of stratum internal structure, oil wells generally see water in the process of water injection production in oil fields. With the increase of water injection rate, the injected water will soon rush along the high permeability layer, forming a water flow dominant channel, so that the swept volume of the injected water is small, and the production of the oil well decreases. Injecting profile control and plugging agents into water injection wells is the main method for plugging h...

Claims

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Application Information

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IPC IPC(8): C09K8/514C09K8/512C09K8/508
CPCC09K8/514C09K8/512C09K8/5083C09K8/5045
Inventor彭冲曾凤凰欧阳诗昆王晓飞张桓卫胜利董亮
Owner陕西林荣桓业能源科技有限公司