Nanometer microemulsion cleanup additive

A technology of nano-microemulsion and drainage aid, which is applied in the direction of production fluid, wellbore/well components, drilling composition, etc., to achieve the effect of improving the effect of fracturing reconstruction, good liquid flowback effect, and simple preparation method
CN104789205AInactive Publication Date: 2015-07-22PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
PETROCHINA CO LTD
Publication Date
2015-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a nanometer microemulsion cleanup additive. The invention provides a concentrate of the nanometer microemulsion cleanup additive. The concentrate comprises 20-45wt% of oil, 15-45wt% of a surfactant, 0.1-35wt% of a cosolvent, 0.1-5wt% of an organic acid, and the balance of water. The invention also provides the nanometer microemulsion cleanup additive prepared by using the concentrate. Amino silicone oil is used as the necessary component of the oil, so the nanometer microemulsion cleanup additive has high fluid flow-back efficiency; the nanometer microemulsion cleanup additive and a fracturing fluid are injected into an oil well to carry out fracturing reconstruction of an oil-gas reservoir, so the fracturing fluid has a good water lock damage clearing performance and promotes the flow-back of the fracturing fluid, thereby the fracturing reconstruction effect of the oil-gas reservoir is improved, and the output of natural gas is increased; and the nanometer microemulsion cleanup additive is simple to prepare, and is convenient to use.
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Description

technical field

[0001] The invention relates to an ultra-low permeability gas well nano microemulsion drainage aid, which belongs to the field of fracturing agents for oil and gas exploitation. Background technique

[0002] With the deepening of oil and gas reservoir exploitation, in order to extract more and deeper oil and gas, the transformation of ultra-low permeability reservoirs has increasingly become the main development field, so fracturing technology has become an important production increase in oil and gas field development measure. As a fracturing fluid drainage aid for fracturing, it plays an important role in increasing production, because for ultra-low permeability, formation capillary water lock damage is very serious, and some data show that 60-90% injection in shale gas fracturing The fluid stays in the formation, and most of the water is trapped around the frac fractures and in the frac fractures. These closed and stagnant liquids will seriously reduce t...

Claims

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