Breakers for foam-like fracturing fluids

A foam fracturing fluid and gel breaker technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of slowing down or stopping, but in fracturing fluids, it cannot or partially restricts large-scale production. Application, harsh application conditions and other problems, to achieve the effect of rapid and thorough gel breaking, good application value and less dosage
CN103265937BInactive Publication Date: 2015-10-28四川省博仁达石油科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
四川省博仁达石油科技有限公司
Publication Date
2015-10-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a gel breaker suitable for a foam-like fracturing fluid, wherein the gel breaker is selected from one or both of iodate and bromate; the iodate is selected form one or more of potassium periodate, sodium periodate, potassium iodate and sodium iodate; and the bromate is selected from one or both of potassium bromate and sodium bromated. The gel breaker has beneficial effects that: the gel breaker has advantages of small usage amount, and rapid and thorough gel breaking. Under low temperature, a small amount of the gel breaker is added, rapid and thorough gel breaking for the fracturing fluid can be implemented, gel breaking time is short, gel breaking effect is good, and solves a gel breaking problem of the foam-like fracturing fluid.
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Description

technical field

[0001] The present invention relates to a breaker suitable for foam-like fracturing fluids. Background technique

[0002] For low-permeability tight reservoirs, even if the fracturing fluid itself is low in damage, if the fracturing fluid has a slow flowback rate and a low flowback rate, it will stay in the formation by increasing the water saturation of the reservoir, increasing the two-phase seepage resistance, and producing Damage such as water sensitivity and water lock will greatly reduce the porosity and permeability of the formation, and even seal the oil and gas layers, which will seriously affect the stimulation effect of fracturing and even have no productivity after fracturing. In order to solve the flowback problem, the whole process of liquid nitrogen co-injection is adopted, and the average amount of liquid nitrogen per well is 5-10m 3 However, liquid nitrogen co-injection brings great trouble to on-site construction, and there are also major p...

Claims

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