Oil and Gas Engineering Institute of Tarim Oilfield

Korla, China

Oil and Gas Engineering Institute of Tarim Oilfield

Korla, China
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Zhou M.,Southwest Petroleum University | Zhao J.,Southwest Petroleum University | Zhou L.,Oil and Gas Engineering Institute of Tarim Oilfield
Journal of Applied Polymer Science | Year: 2011

Starch and montmorrilonite (MMT) were used as raw materials for synthesizing starch-graft-poly[acrylamide (AM)-acrylic acid (AA)]/MMT superabsorbent nanocomposite by graft and intercalation copolymerization reaction of starch, AM, and AA in the presence of organic MMT micropowder in aqueous solution. Major factors affecting water absorbency such as weight ratio of monomers to starch, weight ratio of AM to AA, neutralization degree of AA, amount of crosslinker, initiator, and MMT were investigated. The superabsorbent nanocomposite synthesized under optimal synthesis conditions exhibits absorption of 1120 g H2O/g sample and 128 g H2O/g sample in deionized water and in 0.9 wt % NaCl solution, respectively. IR spectra showed that the graft copolymerization between -OH groups on MMT and monomers took place during the reaction, and that crystal interlayer was pulled open in the superabsorbent nanocomposite. X-ray diffraction analysis showed that the crystal interlayer of MMT was pulled open to 2.73 nm, and thus formed nanometer exfoliation composite material. Thermogravimetric analysis showed that starch-graft-poly (AM-AA) superabsorbent nanocomposite (8 wt % MMT) has good thermal stability. This superabsorbent nanocomposite with excellent water absorbency and water retention, being biodegradable in nature, economical and environment friendly, could be especially useful in industry, agricultural, and horticultural applications. © 2011 Wiley Periodicals, Inc.


Zhou M.,Southwest Petroleum University | Zhao J.,Southwest Petroleum University | Wang X.,Southwest Petroleum University | Jing J.,Southwest Petroleum University | Zhou L.,Oil and Gas Engineering Institute of Tarim Oilfield
Journal of Surfactants and Detergents | Year: 2013

A series of trimeric sulfonate surfactants 1,2,3-tri(2-oxypropylsulfonate- 3-alkylether-propoxy) propanes were prepared by the reaction of glycerin triglycidyl ether with long-chain alcohols, followed by sulfonation with 1,3-propane sultone. Glycerin triglycidyl ether was synthesized by the reaction of epichlorohydrin with glycerin. The chemical structures of the prepared compounds were confirmed by FTIR, 1H NMR and element analysis. Their solution properties were characterized by use of the method of equilibrium and dynamic surface tension, steady-state fluorescence spectroscopy of pyrene and fluorescence quenching. With the increasing length of the carbon chain, the values of their CMC initially decreased. All these trimeric sulfonate surfactants had good water solubility. These compounds were superior in surface active properties to the reference surfactant SDS. The efficiency of adsorption at the water/air interface (pC20) of these surfactants was very high. It is found that the shorter hydrocarbon chain length of the trimeric sulfonate surfactants, the faster the rate of decrease of surface tension, and the bigger the aggregation number of the trimeric sulfonate surfactants. © 2013 AOCS.


Yuan X.,Oil and Gas Engineering Institute of Tarim Oilfield | Lan X.,Oil and Gas Engineering Institute of Tarim Oilfield | Liu J.,Oil and Gas Engineering Institute of Tarim Oilfield | Liu P.,Oil and Gas Engineering Institute of Tarim Oilfield | Luo Z.,Oil and Gas Engineering Institute of Tarim Oilfield
Drilling Fluid and Completion Fluid | Year: 2013

Foam acid has the characteristics of low hydrostatic column pressure, low filtration, strong discharge aiding ability and low damage to reservoir, which is used in production stimulation of low pressure and water sensitive reservoirs. In this paper, a foam acid stabilizer is synthesized and tests of foam stability, acid compatibility, thermal endurance and salt tolerance are developed. The evaluation results show that with 1% concentration of this foam acid stabilizer, the half-life of excluded fluid researches more than 1h. After treated by foam acid with this stabilizer, the permeability of parallel cores is all increased, and the permeability heterogeneity is decreased simultaneously.

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