Hydrocarbon reservoir protective agent and preparing method thereof

A protective agent, oil and gas layer technology, applied in the field of drilling, can solve problems such as poor sealing performance, poor elasticity and rigidity, and inability to effectively protect oil and gas layers.

Active Publication Date: 2016-06-15
四川泓华油气田工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, it is difficult to obtain accurate and complete pore diameter data of oil and gas layers, so the selection of particle size is blind; The selected temporary plugging agent can only achieve a good temporary plugging effect for a certain well section, so it cannot effectively protect the entire oil and gas reservoir
[0004] The existing oil layer protection agents have the following problems: ① Cationic emulsified asphalt oil layer protection agents have a great i

Method used

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  • Hydrocarbon reservoir protective agent and preparing method thereof
  • Hydrocarbon reservoir protective agent and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048]Get 1 part (parts by weight, the same below) as sulfonic acid carboxymethyl guar gum of guar gum, 11 parts of 5# white oil as white oil, 3 parts of alkylphenol polyoxyethylene ether as alkylphenol polyoxyethylene ether Oxyethylene ether-10, 3 parts of sorbitan oleate as sorbitan fatty acid ester were dissolved in 37 parts of water. Heat to 70°C and stir evenly. Adding 11 parts of sulfomethyl phenolic resin powder-I (powder) as sulfonated phenolic resin, 32 parts of particle size is 600-1000 purpose calcium carbonate, 1.5 parts of potassium methyl silicate, 3.5 parts of hydrolysis polyacrylonitrile amine salt ( purchased from Chengdu Longyu Chemical Co., Ltd.), and stirred for 2 hours. The "oil and gas layer protection agent" can be prepared.

[0049] The immersion depth of the base slurry sand bed, the immersion depth of the sample slurry sand bed, the linear expansion of the blank core and the linear expansion of the sample core of the prepared oil and gas layer prote...

Embodiment 2

[0051] Take 0 parts of carboxymethyl guar gum sulfonate, 11 parts of 5# white oil, 3 parts of alkylphenol polyoxyethylene ether-10, and 3 parts of sorbitan oleate and dissolve them in 37 parts of water. Heat to 70°C and stir evenly. Then add 11 parts of sulfomethyl phenolic resin powder-I (powder), 32 parts of calcium carbonate with a particle size of 600-1000 mesh, 1.5 parts of potassium methyl silicate, 3.5 parts of hydrolyzed polyacrylonitrile amine salt (purchased from Chengdu Longyu Chemical Co., Ltd.), stirring for 2h. The "oil and gas layer protection agent" can be prepared.

Embodiment 3

[0053] Take 0.5 parts of carboxymethyl guar gum sulfonate, 11 parts of 5# white oil, 3 parts of alkylphenol polyoxyethylene ether-10, and 3 parts of sorbitan oleate and dissolve them in 37 parts of water. Heat to 70°C and stir evenly. Then add 11 parts of sulfomethyl phenolic resin powder-I (powder), 32 parts of calcium carbonate with a particle size of 600-1000 mesh, 1.5 parts of potassium methyl silicate, 3.5 parts of hydrolyzed polyacrylonitrile amine salt (purchased from Chengdu Longyu Chemical Co., Ltd.), stirring for 2h. The "oil and gas layer protection agent" can be prepared.

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Abstract

The invention relates to a hydrocarbon reservoir protective agent and a preparing method thereof.The hydrocarbon reservoir protective agent contains guar gum, organosilicate, sulfomethal phenolaldehy resin, white oil, calcium salt, alkylphenol ethoxylates, sorbitan fatty acid ester, hydrolysis polyacrylonitrile amine salt and water.The preparing method comprises the steps of 1, heating and evenly mixing water, guar gum, white oil, alkylphenol ethoxylates and sorbitan fatty acid ester to obtain a first mixture; 2, adding sulfomethal phenolaldehy resin, calcium salt, methyl silicate and hydrolysis polyacrylonitrile amine salt to the first mixture and conducting stirring to obtain the hydrocarbon reservoir protective agent.The hydrocarbon reservoir protective agent has high shale hydration expansion inhibiting capacity and dispersing capacity, does not affect the rheological property of drilling fluid, can effectively prevent or delay entering of drilling filtrate into the stratum and prevent or delay pressure increase of formation pores, and prolongs the hole-wall collapsing period.

Description

technical field [0001] The invention relates to drilling technology, in particular to an oil and gas protection agent. Background technique [0002] During the drilling process, due to the existence of the positive pressure difference generated by the drilling fluid, it is difficult to avoid damage to the drilled oil and gas layers. In order to reduce the degree of damage to the oil and gas layers and finally achieve zero-damage drilling, it is necessary to carry out oil and gas layer protection drilling and completion The study of liquid systems. At present, the systems being researched and applied at home and abroad mainly include: non-invasive, positive gel (MMH), silicate, methyl glucose (MEG), formate, full oil base, synthetic base drilling and completion fluid system, etc. [0003] The most commonly used and important one among the existing oil and gas reservoir protection technologies is shielding and temporary plugging technology. However, the temporary plugging ag...

Claims

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Application Information

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IPC IPC(8): C09K8/42C09K8/03
CPCC09K8/03C09K8/42C09K2208/12
Inventor 刘乾忠刘勇
Owner 四川泓华油气田工程科技有限公司
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