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Self-spreading chemical barrier composition and injection method for dissolved-vug reservoirs

A karst cave type and composition technology, applied in chemical instruments and methods, drilling composition, earthwork drilling and mining, etc., can solve problems such as inappropriateness, achieve good airtightness, simple construction, and avoid the effect of synthetic technology

Active Publication Date: 2020-06-16
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, jelly and silicate gel are not suitable for high temperature and high pressure cave reservoirs

Method used

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  • Self-spreading chemical barrier composition and injection method for dissolved-vug reservoirs
  • Self-spreading chemical barrier composition and injection method for dissolved-vug reservoirs
  • Self-spreading chemical barrier composition and injection method for dissolved-vug reservoirs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Add 0.6g of divinylbenzene, 0.3g of di-tert-butyl peroxide, and 0.1g of TEMP to 99g of styrene monomer, stir evenly to make it evenly mixed, put the obtained chemical separator material in an aluminum-capped sample bottle, and put the its sealed. Place the sample bottle in a high temperature tank, add an appropriate amount of water (the water level is flush with the height of the solution in the sample bottle) into the high temperature tank, and seal it. The above-mentioned chemical separator is obtained by placing the high temperature tank in an oil bath with a formation temperature of 130°C to polymerize the raw materials. The polymerization time of the chemical separator material at 130° C. is 5 hours, and the obtained chemical separator has a bending strength of 73.42 MPa after testing.

Embodiment 2

[0061] Add 0.5g of divinylbenzene, 0.4g of di-tert-butyl peroxide, and 0.1g of TEMP to 99g of styrene monomer, stir to make it evenly mixed, put the obtained chemical separator raw material in an aluminum-capped sample bottle, and put the its sealed. Place the sample bottle in a high temperature tank, add an appropriate amount of water (the water level is flush with the height of the solution in the sample bottle) into the high temperature tank, and seal it. The high temperature tank is placed in an oil bath with a formation temperature of 130°C to allow the raw materials to polymerize to obtain a chemical separator. The polymerization time of the chemical separator material at 130° C. is 9 hours, and the obtained chemical separator has a bending strength of 71.84 MPa after testing.

Embodiment 3

[0063] Add 0.6g of divinylbenzene, 0.35g of di-tert-butyl peroxide, and 0.05g of TEMP to 99g of styrene monomer, stir evenly to fully dissolve, and place the obtained chemical separator material in an aluminum-capped sample bottle. its sealed. Place the sample bottle in a high temperature tank, add an appropriate amount of water (the water level is flush with the height of the solution in the sample bottle) into the high temperature tank, and seal it. The above-mentioned chemical separator is obtained by placing the high temperature tank in an oil bath with a formation temperature of 130°C to polymerize the raw materials. The polymerization time of the chemical separator material at 130° C. is 12 hours, and the obtained chemical separator has a bending strength of 73.08 MPa after testing.

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Abstract

The invention relates to the technical field of oilfield chemistry, and particularly relates to a self-deploying cloth chemical separator plate composition for dissolved cavern type oil reservoirs andan injection method thereof. The composition includes styrene, diethenylbenzene, di-tert-butyl peroxide, and 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl. A self-deploying cloth chemical separatorplate prepared from the composition for dissolved cavern type oil reservoirs has excellent temperature resistance, and can effectively control bottom water in an high-temperature oil reservoir environment having oil with a temperature of 130 DEG C or above and a degree of mineralization of 20*10<4> mg / L or above.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to a self-spreading chemical separator composition for a cave type oil reservoir and an injection method thereof. Background technique [0002] Bottom water coning is an important reason for reducing single well production and recovery in bottom water reservoirs. For karst-cavity bottom water reservoirs, the reservoirs are quite different from pore-type and fractured reservoirs. Pores, fractures and caves coexist in the reservoir, and the large-scale paleo-karst-cavity system is the main storage space. The reservoir scale varies greatly in space, and the spatial distribution of the reservoir is discontinuous. When the oil and gas wells are put into production, the water cone phenomenon is prone to occur in the oil and gas layers due to the influence of the gravity difference between oil, water or gas and water. With the increase of oil and gas production rates, the wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F212/36C09K8/512E21B43/32
CPCC08F212/08C09K8/5083C09K8/512E21B43/32C08F212/36
Inventor 赵海洋甄恩龙焦保雷何龙任波钱真王建海黄明良巫光胜张佳杨映达杨祖国
Owner CHINA PETROLEUM & CHEM CORP
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