Organoantimony crosslinking agent and its preparation method and cleaning fracturing fluid

Abstract

The invention relates to an organic antimony cross-linking agent, a preparation method of the organic antimony cross-linking agent and clean fracturing fluid. The clean fracturing fluid comprises the following ingredients (by weight percentage): 0.18-0.30% of low molecular weight polymer, 0.3-0.5% of organic antimony cross-linking agent, 0.2% of cleanup additive, 0.3% of clay stabilizer, 0.01-0.02% of gel breaker and the balance of water, wherein the percentage sum of the above ingredients is 100%. According to the clean fracturing fluid, since an antimony group is introduced into a polymer molecule, the temperature tolerance of the fracturing fluid is obviously improved; the fracturing fluid still can keep higher viscosity even at 180 DEG C; in addition, after the gel breaker is added; no water insoluble matter is available; the clean fracturing fluid is an ideal clean fracturing fluid system, is low in cost, low in friction resistance, easy to regulate and simple to prepare and has shear resistance; and the construction is safe and reliable.

Description

technical field [0001] The invention relates to an organic antimony crosslinking agent, in particular to an organic antimony crosslinking agent, a preparation method thereof and a cleaning fracturing fluid. Background technique [0002] At present, domestic oilfield hydraulic fracturing construction basically adopts polymer fracturing fluid technology, that is, guar gum and its derivatives used in water-based polymer fracturing fluid, because of its good rheological control characteristics, It has been used in fracturing fluids for many years. However, like many other water-based fracturing fluids, hydroxypropyl guar gum (HPGF) still has inevitable defects: first, it cannot quickly swell and hydrate, and the dissolution rate is slow, so it is difficult to solve the problem of construction scale and rapid gel-breaking return. The contradiction between the performance requirements of the fracturing fluid is eliminated; the second is that the vegetable glue fracturing fluid of...

AI Technical Summary

Problems solved by technology

However, like many other water-based fracturing fluids, hydroxypropyl guar gum (HPGF) still has inevitable defects: first, it cannot quickly swell and hydrate, and the dissolution rate is slow, so it is difficult to solve the problem of construction scale and rapid gel-breaking return. The contradiction between the performance requirements of the fracturing fluid is eliminated; the second is that the vegetable glue fracturing fluid often has a lot of residue after the gel is broken, which is easy to block the filling layer of the fracture, causing secondary damage and affecting the fracturing effect; the third is that the plant glue Natural polymers such as gelatin cellulose have poor temperature resistance and are easy to biodegrade. Can meet the well construction below 80 degrees

The filtration loss in the formation is serious, and the cost is high, which also limits its wide application

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