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Emulsified asphalt profile control agent

A technology of emulsified asphalt and profile control agent, applied in chemical instruments and methods, drilling composition and other directions, can solve problems such as high cost and complex process

Active Publication Date: 2012-11-21
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process is complicated and the cost is high, and the selective water shutoff needs to be further improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: a kind of emulsified asphalt profile control agent The weight percent of each component is:

[0043] Drugs and doses used in this embodiment are as follows:

[0044] Asphalt: 45%;

[0045] Sodium dodecyl diphenyl ether disulfonate: 0.3%;

[0046] Sodium fatty alcohol polyoxyethylene ether sulfate: 0.3%;

[0047] Fatty acid polyoxyethylene ester: 0.05%;

[0048] Phenylphenyl polyoxypropyl polyoxyethyl ether: 0.02%;

[0049] Sodium pyrophosphate: 0.3%

[0050] Ultrafine calcium powder: 0.02%

[0051] Carboxymethyl cellulose: 0.02%;

[0052] Anionic polyacrylamide: 0.02%;

[0053] Sodium hydroxide: 0.000004%;

[0054] The rest is injected water from Wangyao Oilfield (salinity is 750mg / L), and the sum of the weight percentages of each component is 100%.

[0055] The preparation of this embodiment:

[0056] Step 1, melting the asphalt;

[0057] Step 2, sodium dodecyl diphenyl ether disulfonate, fatty alcohol polyoxyethylene ether sodium sulfate, fatty ...

Embodiment 2

[0062] Embodiment 2: a kind of emulsified asphalt profile control agent The weight percent of each component is:

[0063] Drugs and doses used in this embodiment are as follows:

[0064] Asphalt: 50%;

[0065] Sodium dodecyl diphenyl ether disulfonate: 0.5%;

[0066] Fatty alcohol polyoxyethylene ether sodium sulfate: 0.5%;

[0067] Fatty acid polyoxyethylene ester: 0.08%;

[0068] Phenylphenyl polyoxypropyl polyoxyethyl ether: 0.1%;

[0069] Sodium pyrophosphate: 0.6%

[0070] Ultrafine calcium powder: 0.06%

[0071] Carboxymethyl cellulose: 0.04%;

[0072] Anionic polyacrylamide: 0.04%;

[0073] Sodium hydroxide: 0.0004%;

[0074] The rest is injected water from Wangyao Oilfield (salinity is 750mg / L), and the sum of the weight percentages of each component is 100%.

[0075] The preparation of this embodiment:

[0076] Step 1, melting the asphalt;

[0077] Step 2, sodium dodecyl diphenyl ether disulfonate, fatty alcohol polyoxyethylene ether sodium sulfate, fatty a...

Embodiment 3

[0082] Embodiment 3: a kind of emulsified asphalt profile control agent The weight percent of each component is:

[0083] Drugs and doses used in this embodiment are as follows:

[0084] Asphalt: 55%;

[0085] Sodium dodecyl diphenyl ether disulfonate: 0.8%;

[0086] Fatty alcohol polyoxyethylene ether sodium sulfate: 0.6%;

[0087] Fatty acid polyoxyethylene ester: 0.08%;

[0088] Phenylphenyl polyoxypropyl polyoxyethyl ether: 0.5%;

[0089] Sodium pyrophosphate: 0.8%

[0090] Ultrafine calcium powder: 0.06%

[0091] Carboxymethyl cellulose: 0.05%;

[0092] Anionic polyacrylamide: 0.06%;

[0093] Sodium hydroxide: 0.04%;

[0094] The rest is injected water from Wangyao Oilfield (salinity is 750mg / L), and the sum of the weight percentages of each component is 100%.

[0095] The preparation of this embodiment:

[0096] Step 1, melting the asphalt;

[0097] Step 2, sodium dodecyl diphenyl ether disulfonate, fatty alcohol polyoxyethylene ether sodium sulfate, fatty aci...

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Abstract

Disclosed is an emulsified asphalt profile control agent. The emulsified asphalt profile control agent is applied to adjustment of injection profiles of water injection wells in the water injection development process of oil fields. The water drive wave and efficiency are improved. The emulsified asphalt profile control agent comprises, by weight, 45-65% of asphalt, 0.3-1.2% of dodecyl diphenyl ether sodium disulfonate, 0.3-1.2% of sodium alcohol ether sulphate, 0.05-0.1% of polyoxyethylene fatty acid, 0.02-0.8% of phenethyl phenyl polyoxypropylated polyoxyethylene ether, 0.3-1.5% of sodium pyrophosphate, 0.02-0.1% of ultra-fine calcium powder, 0.02-0.08% of carboxymethyl cellulose, 0.02-0.08% of anionic polyacrylamide, 0.000004-0.04% of sodium hydroxide and the balance fresh water of which the salinity is less than 1,000mg / L. The emulsified asphalt profile control agent has the advantages that the emulsified asphalt profile control agent can enter deep portions of oil reservoirs effectively, the water plugging rate is more than 90% under the condition that the injection capacity accounts for 1-15% of the reservoir preprocessing radius hole volume, the validity period of the water plugging is more than 2 years and oil flow channels are not damaged.

Description

technical field [0001] The invention relates to the technical field of oil field development, and is an emulsified asphalt profile control agent with long effective action time, which is used for adjusting the water absorption profile of a water injection well during the water injection development process of an oil field, improving the sweep efficiency of water flooding, and increasing the oil recovery rate. Background technique [0002] In the process of oilfield water injection development, due to the heterogeneity of the formation, the channeling and bypassing of the injected water is serious, and the injected water often flows along the high permeability layer and does not reach the oil-bearing low permeability layer, so that the water content of the oil well output fluid is sharp. rise, water flooding swept volume and recovery factor decrease. In view of the above problems, the profile control technology of adjusting the water absorption profile of the injection well a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/58C09K8/42
Inventor 高春宁付金华徐黎明张永强李文宏范伟张宏强余光明向中远徐飞艳金拴联董美玲韩翼云
Owner PETROCHINA CO LTD
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