Volume 35 Issue 3
May  2018
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ZHOU Daisheng, LI Qian, ZHANG Qigen, WANG Wei, XIE Xiantiao. Evaluation and Application of a Pollution Resistant Spacer Fluid GLJ Converted from Active Mud[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(3): 100-104. doi: 10.3969/j.issn.1001-5620.2018.03.017
Citation: ZHOU Daisheng, LI Qian, ZHANG Qigen, WANG Wei, XIE Xiantiao. Evaluation and Application of a Pollution Resistant Spacer Fluid GLJ Converted from Active Mud[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(3): 100-104. doi: 10.3969/j.issn.1001-5620.2018.03.017

Evaluation and Application of a Pollution Resistant Spacer Fluid GLJ Converted from Active Mud

doi: 10.3969/j.issn.1001-5620.2018.03.017
  • Received Date: 2017-10-20
  • Publish Date: 2018-05-30
  • With the advance of high temperature deep well and ultra-deep well development in Sichuan and Chongqing, the compatibility of cement slurry for well cementing with drilling fluid, which is probable to cause cement slurry to become thickened and agglomerate, is becoming more and more protruding. A pollution resistant spacer, GLJ, is developed from active mud based on the work done on the analyses of and study on the contamination factors existed in the process of cement slurry-mud contact. Laboratory evaluation and field operations show that GLJ is easy to and convenient to formulate by just adding spacer agents into active mud, thereby reducing the amount of new liquid and weighting materials required and reducing the burden of field stocks. GLJ has good rheology and suspension stability; the rheological properties of GLJ can be adjusted based on the requirements of field operations. Good thermal stability of GLJ makes it possible for GLJ to stay a long time in the borehole without barite settlement. GLJ has excellent compatibility with cement slurry; mixed fluids with different ratios of components of the fluids have consistence that is less than 40 Bc after 240 min of HTHP thickening test. The spacer GLJ has minor effect on the properties of drilling fluids. The remained GLJ in mud tanks and the GLJ returned from the borehole can all be mixed with active mud for reuse, thereby minimizing the effort required for the discharge and treatment of waste fluids, which is of good economic benefits and social benefits.

     

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