Volume 37 Issue 3
Jun.  2020
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2020  >  37(3): 394-397,404
QIANG Jie, DONG Jun, YIN Ruixin, YANG Jianlin, HAN Enjun, LIU Enshan, ZHANG Zufeng, SHAO Yanfeng. A New Low-Cost High-Density Solids Free Anti-Scaling Compound Salt Kill Mud[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(3): 394-397,404. doi: 10.3969/j.issn.1001-5620.2020.03.022
Citation: QIANG Jie, DONG Jun, YIN Ruixin, YANG Jianlin, HAN Enjun, LIU Enshan, ZHANG Zufeng, SHAO Yanfeng. A New Low-Cost High-Density Solids Free Anti-Scaling Compound Salt Kill Mud[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(3): 394-397,404. doi: 10.3969/j.issn.1001-5620.2020.03.022
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A New Low-Cost High-Density Solids Free Anti-Scaling Compound Salt Kill Mud

doi: 10.3969/j.issn.1001-5620.2020.03.022

  • 1. Petroleum engineering research institute of PetroChina Dagang Oilfield Company, Tianjin 300280;

  • 2. The third oil recovery company of PetroChina Dagang Oilfield Company, Tianjin 300280;

  • 3. The fifth oil recovery company of PetroChina Dagang Oilfield Company, Tianjin 300280;

  • 4. The sixth oil recovery company of PetroChina Dagang Oilfield Company, Tianjin 300280

  • Received Date: 2020-02-15
  • Publish Date: 2020-06-28
    Abstract
  • Bromide, zinc salts and heavy calcium salts used in kill mud for HTHP reservoirs have poor compatibility with formation waters, formation contamination and high corrosivity. High density kill muds formulated with formats are quite expensive. A new weighting agent was recently developed with the help of efficient scale inhibiting technology. Using this weighting agent, a low-cost high-density solids free anti-scaling compound salt kill mud was formulated. The base fluid of the kill mud was formulated with some cheap inorganic salts. This kill mud is free of calcium and magnesium ions, all salts presented in the kill mud are monovalent salts. The maximum density of the kill mud is 1.70 g/cm3. This kill mud, with its cost being only 50% of a formate kill mud of the same density, retains all the advantages of the formate kill mud. The new kill mud is low damage, lost cost, high density, solids free and nontoxic., satisfying the requirements of the new national safety and environment protection laws. Pilot test of the new kill mud on a well drilled in Dagang Oilfield showed that the average yield recovery period of the well was 1 d and the average percent recovery of yield was 100%, demonstrating that the kill mud has the capacity of reservoir protection.

     

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