Polymer crosslinking agent for high-temperature-resistant water-based fracturing fluid and preparation method of polymer crosslinking agent
A water-based fracturing and cross-linking agent technology, which is applied in the direction of drilling compositions, 4/14 organic compounds without C-metal bonds, chemical instruments and methods, etc., can solve the problem of large ionic radius and small ionic radius , weak electricity and other issues
Inactive Publication Date: 2016-02-10
北京希涛技术开发有限公司 +1
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Ti 4+ The ionic radius is small, the electrical property is relatively strong, the energy level difference is large, the hydrolysis is fast, and the energy and -SO 3 -, -COO- and other acid anions quickly form coordination bonds; Zr 4+ Large ionic radius, relatively weak electrical properties, small energy level difference, and can also be combined with -SO 3 -, -COO- and other acid radical anions form coordination bonds, but the formation speed is slow; at high temperature, the formation speed will be greatly increased, and the coordination bond stability is high, showing better high temperature crosslinking
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[0011] The crosslinking agent of the present invention and its production process will be described in detail below based on specific examples.
[0012] In a three-necked flask, add an aqueous acetone water solution (volume ratio: acetone: water = 7: 3) and a complexing agent in the designed ratio; under nitrogen protection and an ice water bath at 0°C, add zirconium tetrachloride and zirconium tetrachloride and (Or) The acetone solution of zirconium tetrachloride, add in 30-40min, stir and react for 1.0h; warm up to 60℃; continue to stir and reflux for 3h at constant temperature; use a rotary evaporator to evaporate the acetone solvent to obtain different crosslinking agents, see Table 1. The performance test results of the crosslinking agent are shown in Table 2 and Table 3.
[0013] Table 1 Crosslinking agent synthesis monomer types and ratio table
[0014]
[0015] Note: "-" in the table means that this substance is not added.
[0016] Table 2 Cross-linking agent synthetic monom...
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A polymer crosslinking agent for high-temperature-resistant water-based fracturing fluid is suitable for fracturing construction of a reservoir stratum at 180-200 DEG C. The synthesis scheme is that an acetone water solution (the volume ratio of acetone to water is 7:3) is added into a three-necked flask, zirconium oxychloride (ZrOCl2), titanium tetrachloride (TiCl4), maleic acid (MA), acetylacetone (AAT) and isobutanol (IPA) (the mole ratio of ZrOCl2 to TiCl4 to MA to AAT to IPA is 1.20:0.800:0.220:0.180:0.440) are added into the flask according to designed ratio under nitrogen protection at certain temperature in 30-40 min, and stirring is conducted for 1.0 h for the reaction; temperature is risen to 60 DEG C, and continuous stirring is conducted for 3 h for the constant temperature backflow reaction; evaporation is conducted through a rotary evaporator to remove the acetone solvent so as to obtain the crosslinking agent.
Description
Technical field [0001] The invention relates to the technical field of oilfield chemistry and fracturing production enhancement technology, in particular to a polymer crosslinking agent for high temperature resistance water-based fracturing fluid and a production method thereof. The polymer crosslinking agent is suitable for 180-200°C reservoirs Fracturing construction. Background technique [0002] Organic titanium is characterized by fast hydrolysis, fast crosslinking, and sufficient crosslinking ability at low temperatures, but the temperature and shear resistance of crosslinked fracturing fluids is relatively poor. Organic zirconium is characterized by slow hydrolysis and slow crosslinking. Its hydrolysis speed increases at high temperatures, which can make up for the partial loss of crosslinking effect of organic titanium due to temperature, thereby improving the temperature and shear resistance of the fracturing fluid system. The disadvantage is that the cross-linking is s...
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IPC IPC(8): C09K8/68C08F222/02C08F2/44C08K3/16C08K3/22C07F19/00
CPCC09K8/685C07F7/003C08F222/02C08K3/16C08K3/22C08K2003/2244C09K8/882C09K8/887C08F2/44
Inventor 苏盈豪唐富刚陈效领李帅帅
Owner 北京希涛技术开发有限公司