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Yao J.,Downhole Operation Service of Liaohe Oilfield | Guo F.,Downhole Operation Service of Liaohe Oilfield | Guo G.,Downhole Operation Service of Liaohe Oilfield | Ren Y.,Downhole Operation Service of Liaohe Oilfield | And 3 more authors.
Drilling Fluid and Completion Fluid | Year: 2010

A high-temperature crosslinking agent ZS-1 was synthesized by laboratory experiments which has wider applied pH 9.0-12.0, than the traditionals in Liaohe oil-field. As well as the other characteristics that the concentration is 0.2%-0.4%, the applied temperature is 80-140 °C, and the crosslinking time is 40-300 s. Using this crosslinking agent, the aqueous fracturing fluid has some advantages such as shearing stable, carrying cuttings well, working at 160 °C. Moreover, at 120 °C, the apparent viscosity is still more than 90 mPa • s with continuously shearing 90 min at 170 s-1. Also it can be broken down by oxidant gel breaker. The successful field operation in 10 wells showed that it could protect the reservoirs and stimulate production. Source

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