›› 2005, Vol. 26 ›› Issue (11): 1829-1833.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

A new technology for controlling hole-stability in salt/gypsum stratum by unsaturated organic-salt liquor drilling fluid

ZHENG Li-hui1, CHEN Mian1, ZHANG Min-li2, WANG Zhi-jun2, YAO Shao-quan3   

  1. 1. College of Petroleum Engineering, China Petroleum University, Beijing 102249, China; 2. The Fourth Exploration Company, Tarim Oil Exploration & Development Bureau, Xinjiang 841000, China; 3. Pecome Technology Co. Ltd, Beijing 100083, China
  • Received:2004-05-27 Online:2005-11-10 Published:2014-01-03

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Abstract: Oil-based drilling fluids, saturated/under-saturated saltwater drilling fluids were generally introduced to salt/gypsum stratum according to mechanics and physics analysis. But oil-based drilling fluids cannot be applied cosmically because of itself limitation. And accidents and complex situations take place frequently by adopting saturated/under-saturated saltwater drilling fluids. Under acceptable drilling fluids cost condition, hole in salt/gypsum stratum can be stabilized that under-saturated organic salt liquor drilling fluids with proper density can satisfy the condition that formation salts are solved appropriately and keep better drilling fluids inhibition. Two drilling fluids are prepared by organic salt based solution density of 1.30 g/cm3 and 1.36 g/cm3 respectively; and their routine properties, resistance to fouling, and inhibition are evaluated in lab. The conclusion of experiment is that two drilling fluids can achieve the need of drilling salt/gypsum stratum; and the two drilling fluids were applied to Y5-2 well for a field experiment. Results show no fault and less drilling cost compared with other wells in the same structure.

Key words: controlling, salt/gypsum stratum, hole-stability, unsaturated organic-salt liquor, drilling fluid, research, application

CLC Number: 

  • TU 443
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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