Volume 32 Issue 1
Jan.  2015
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HOU Shili, HUANG Daquan, YANG Hewei, LIU Guangyan, LI Shuan, WANG Lukun, SUN Shuang, WANG Xiaofang. Study and Application of Rigid Wedging Mud Loss Control Under Pressure[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(1): 49-52. doi: 10.3969/j.issn.1001-5620.2015.01.013
Citation: HOU Shili, HUANG Daquan, YANG Hewei, LIU Guangyan, LI Shuan, WANG Lukun, SUN Shuang, WANG Xiaofang. Study and Application of Rigid Wedging Mud Loss Control Under Pressure[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(1): 49-52. doi: 10.3969/j.issn.1001-5620.2015.01.013

Study and Application of Rigid Wedging Mud Loss Control Under Pressure

doi: 10.3969/j.issn.1001-5620.2015.01.013
  • Received Date: 2014-09-10
  • Publish Date: 2015-01-30
  • The rigid wedging mud loss control under pressure is a technology in which rigid lost circulation material (LCM), expandable or expandable LCM, and low permeability LCM are employed to bridge the mud loss channels. It involves bridging, wedging and filling in the fractures and pores of formation to increase the circumferential stress of formation, hence enhancing the pressure bearing of the formation. LCM slurries for mud loss control under pressure were formulated with optimized particle size distribution determined by SAN-2 engineering theory. The rigid LCM was also compounded with other LCM to verify their performance in mud loss control. The experiments showed that LCM slurries containing compounded rigid LCM, expandable LCM and low permeability LCM promptly bridged and filled the fractures and formed low permeability packing with pressure bearing of 7 MPa. In field application of this technology in 33 wells, success rate of mud loss control was increased remarkably, and the quantity of LCM slurries was reduced.

     

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