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| Preparation and evaluation of fluid loss reducer of heatresistant and environment friendly modified starch |
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CHI Yaoling1, ZHENG Lihui2, JI Dekun1, YI Yufeng1, FAN Chengwei3, DING Fuchen1, LAI Zuolong1
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(1.College of Chemical Engineering in Beijing Institute of Petrochemical Technology, Beijing 102617, China;2.MOE Key Laboratory of Petroleum Engineering in China University of Petroleum, Beijing 102249, China;3.Xifeng Industrial and Commerical Company, Urumqi Petrochemical Complex Factory, Urumqi 830019, China)
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| Abstract: |
| The AM monomer and AMPS monomer were introduced to the starch 's chain structure by graft copolymerization. The modified starch was obtained after drying. The product 's heat stability was investigated by TGDTA. On the basis of evaluation criterion for the fluid loss reducer, the filtration loss property of modified starch was evaluated by the freshwater experiment, heat resistant experiment, salt resistant experiment and calcium resistant experiment. The results show that the fluid loss reducer decomposes at 280 ℃. The fluid loss reducer has good filtration property when its weight percent is 1.3％. The fluid loss reducer has heat stability, salt resistant and calcium resistant capability. The modified starch is one of environment friendly drilling fluid additives. |
| Key words: drilling fluid heat resistant fluid loss reducer modified starch |
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