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Ground negative-pressure oil extraction process and device thereof

A negative pressure, ground technology, applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of large composition limitation and little improvement in emulsifying ability, and reduce oil-water interfacial tension and oil-water separation time. The effect of shortening and increasing emulsification

Inactive Publication Date: 2018-04-20
张晓静
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, current compositions such as surfactants have relatively large limitations in their components, and the use of commonly used reagents or simple deformations on the basis of common practice results in little improvement in their emulsifying ability. Therefore, it is necessary to develop a Reagents that are suitable for the special environment of the bottom layer and can significantly increase the amount of crude oil collected are particularly important

Method used

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  • Ground negative-pressure oil extraction process and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A surface negative pressure oil recovery process, the oil recovery method includes introducing the following composition into an oil well in the formation, and using the negative pressure method for oil recovery.

[0028] The composition includes a main agent and a synergist; the types and parts by weight of the various components in the main agent and the synergist can be selected as follows:

[0029] (1) 16 parts of wolfberry betaine, 4.5 parts of arylalkyl polyoxyethylene ether carboxy betaine, 4 parts of cetearyl glucoside, 15 parts of dodecyl sulfonate, phenyl ether thiazole carboxylate 7 parts, 8 parts of 6-p-toluidine naphthalene sulfonic acid, 3 parts of guar gum, 4 parts of lignin;

[0030] (2) 13 parts of wolfberry betaine, 2.5 parts of arylalkyl polyoxyethylene ether carboxy betaine, 3 parts of cetearyl glucoside, 20 parts of dodecylsulfonate, phenyl ether thiazole carboxylate 10 parts, 5 parts of 6-p-toluidine naphthalene sulfonic acid, 2 parts of diphenyl ...

Embodiment 2

[0037] For the composition in Example 1, its preparation method is: betaine derivatives, diphenyl ethers, heterocyclic salts, naphthyl sulfonates, glucoside derivatives, and alkyl sulfonates in the main agent are Add the proportions in Example 1 to water one by one, that is, add one type and then the other, stir at 60-80 degrees Celsius for 1-3 minutes, then add the ingredients of the synergist, continue to stir and mix until it is in an emulsified state Stirring was stopped to obtain the composition. In the composition, the proportion of water accounts for 20-30% of the total weight.

Embodiment 3

[0039] For the negative pressure oil production method in embodiment 1, can also comprise the following steps: the deep well pump that oil production is used is arranged in the oil well to be produced, then packer is set between 70~150 meters above the deep well pump, then in A negative pressure space is formed below the packer, and then negative pressure oil recovery is carried out. For other commonly used oil recovery devices or conventional processes, reference may be made to the prior art.

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Abstract

The invention relates to a ground negative-pressure oil extraction process and a device thereof. An oil extraction method comprises introducing a composition as follows into a stratum oil well and extracting oil by using a negative-pressure method; the composition is prepared from a main agent and a synergist, wherein the main agent is prepared from the following components in parts by weight: 15-25 parts of a betaine derivative, 3-7 parts of a glucoside derivative, 10-20 parts of alkane sulfonate, 5-10 parts of heterocyclic salt and 5-10 parts of naphthyl sulfonate; the synergist is preparedfrom at least two of the following components: 2-5 parts of guar gum, 3-5 parts of lignin and 2-5 parts of triethanolamine. Through the ground negative-pressure oil extraction process and the device thereof, the oil is extracted by adding the corresponding composition and the negative-pressure oil extraction process; the effect is obvious; through the interaction between the main agent and the synergist, the oil-water interfacial tension is greatly reduced, and the emulsifying capability is improved; the composition has high salt resistance and high resistance to high temperature, and is capable of resisting the special environment of a stratum and achieving a good oil extraction effect and high oil extraction mount during specific oil extraction.

Description

technical field [0001] The invention relates to the technical field of crude oil collection, and more specifically, to a surface negative pressure oil recovery process and a device thereof. Background technique [0002] Crude oil collection is one of the most important and basic links in the petroleum industry. The amount of crude oil collected in a unit oil field directly affects the cost input and return benefits. Therefore, in order to collect the crude oil in the oil well more thoroughly, in the traditional industry, the mode of injecting water into the oil well is often used to increase the oil recovery. [0003] However, only by water injection, there will be a lot of residual oil in the oil well after collection, and the purpose of complete collection cannot be achieved, resulting in increased costs and waste of resources. At present, surfactants and other types of compositions are gradually used in the field of crude oil collection. They have strong emulsifying abil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/588E21B43/22
CPCC09K8/584C09K8/588E21B43/16
Inventor 张晓静刘芳刘朋民冯国勇王兴华
Owner 张晓静
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