Research and application of amphoteric polymers for drilling fluid
- Scientific Research Inst. of Petroleum Exploration and Development, Beijing (China)
As the inhibition ability is not strong enough and the tolerance ability of solid contamination is low for the usual polymer drilling fluids, the amphoteric polymer drilling fluid is suggested to solve these problems after analyzing and researching interactive mechanisms and components of polymer drilling fluid as well as structure character of polymer molecule. The application in 15 oilfields (nearly 4,000 wells) in China demonstrates that the amphoteric polymer drilling fluid has strong inhibition, can retard ``mud-making`` of shale formation, keeps low-solid content and is wellbore stable. The amphoteric polymer drilling fluid has excellent rheological properties to make full use of jet-bit drilling and achieve significantly increased drilling rates. The obvious results in the protection of oil formation have been achieved.
- OSTI ID:
- 113580
- Report Number(s):
- CONF-950207--
- Country of Publication:
- United States
- Language:
- English
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