西南石油大学学报(自然科学版) ›› 2011, Vol. 33 ›› Issue (3): 130-132.

• 石油与天然气工程 • Previous Articles     Next Articles

The Application of Optimizing Particle Size of Grain Blocking Agents in the Drilling Process

ZHANG Feng-ying 1 YAN Jie-nian 2 LI Zhi-yong 2
  

  1. 1. Research Institute of Petroleum Engineering, SINOPEC, Chaoyang Beijing, 100101, China;
    2. MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Changping, Beijing 100249, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-06-20 Published:2011-06-20

PDF (PC)

440

Abstract: If the drilling fluid can form the mud cake with no permeability on the borehole wall, the drilling fluid will have better reservoir protection effectiveness. We need to find a more reasonable method, based on the optimum

matching relationship between particle size of temporary blocking agent and pore size of reservoir. According to the“Ideal Packing Theory”and the“d90 Rule”, a new beneficial optimum method for reservoir protection is put forward. We can find out the optimum matching relationship more rapidly and accurately, among different kinds of temporary blocking agent products with a variety of particle size. Compared to traditional methods, the new method is of a higher recovery value of core permeability, and it can stop the solid particle and filtrate from invading into
hydrocarbon reservoir more effectively. Therefore it is good for reservoir protection. Field test also confirmes that application of this new method can achieve the ideal effects of reservoir protection.

Key words:

drilling fluid, formation damage, grain size distribution, ideal packing theory, grain blocking agents, reservoir protection

CLC Number: