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Hay gel water deep shutoff agent

A technology of water blocking agent and hay, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of compressive strength, plugging strength, scour resistance, high temperature resistance, low oil-water selection ability, and profile control agent. High cost of materials, easy to be affected by hard water or sewage, etc., to achieve the effect of high plugging strength, high compressive strength and low cost of raw materials

Inactive Publication Date: 2015-12-09
山东聚鑫化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a large number of deep water blocking agents have been researched, there are still some problems, such as: (1) the cost of the prepared profile control agent is relatively high; (2) the compressive strength, plugging strength, Erosion resistance, high temperature resistance, low selectivity to oil and water; (3) easily affected by hard water or sewage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Raw materials (percentage by weight): 1.5% of dry grass, 4.0% of acrylamide monomer, 1.0% of acrylic acid, 0.5% of aluminum sulfate, 0.1% of ammonium persulfate, 0.1% of sodium bisulfite, and the balance is water.

[0011] The preparation method is: mix acrylamide monomer, acrylic acid, hay and water evenly according to the ratio of raw materials, then add aluminum sulfate, ammonium persulfate, sodium bisulfite, control the temperature at 20-30 degrees Celsius and polymerize for 1-2 hours to form a gel , to obtain a gel-like product.

Embodiment 2

[0013] Raw materials (percentage by weight): 3.0% of dry grass, 7.0% of acrylamide monomer, 2.0% of acrylic acid, 0.5% of aluminum sulfate, 0.15% of ammonium persulfate, 0.15% of sodium bisulfite, and the balance is water.

[0014] The preparation method is: mix acrylamide monomer, acrylic acid, hay and water evenly according to the ratio of raw materials, then add aluminum sulfate, ammonium persulfate, sodium bisulfite, control the temperature at 20-30 degrees Celsius and polymerize for 1-2 hours to form a gel , shearing, granulating, and drying the obtained gel to obtain a granular product.

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Abstract

The invention relates to a hay gel water deep shutoff agent and belongs to the field of oilfield chemistry. The hay gel water deep shutoff agent is characterized by comprising the following raw materials in percentage by mass: 0.5-3.0% of hay, 3.0-7.0% of an acrylamide monomer, 1.0-2.0% of acrylic acid, 0.3-0.8% of a crosslinking agent, 0.1-0.3% of an initiator, 0.1-0.3% of a stabilizer and the balance of water. The hay gel water deep shutoff agent provided by the invention can be used for heterogeneous sandstone oilfields, has a good blocking effect on a high pervious bed and a large pore path of the oilfield, has the advantages of being great in compressive strength, high in blocking strength, washing resistant and high-temperature resistant, and is not affected by hard water and sewage in the stratum. The raw materials adopted are relatively low in cost and simple to prepare.

Description

technical field [0001] The invention belongs to the field of oilfield chemistry, and in particular relates to a hay gel deep water shutoff agent. technical background [0002] Water from oil wells is a serious threat to production quality and safety in oil exploration and production at the present stage, and this problem exists universally. Water production from oil wells is mainly caused by the difference in the mobility ratio and heterogeneity of oil and water in the oil reservoir. Water from oil wells is relatively common throughout the entire process of oil production, especially in the later stages of production. The loss and impact caused by oil wells are huge, which will lead to economically beneficial oil wells becoming worthless dry wells, and lead to a large amount of water produced from the extracted oil, which will increase the cost of dehydration and cause waste in oil production. Especially for the heterogeneous sandstone oilfields developed by water flooding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512
CPCC09K8/512C09K8/5083C09K8/514C09K2208/08
Inventor 张晖郭继宝王岷全孔庆水李润权
Owner 山东聚鑫化工有限公司
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