Volume 39 Issue 4
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ZHAO Suli.Study on concentration responsive water thixotropic material and plugging technology of water bearing leakage layer[J]. Drilling Fluid & Completion Fluid，2022, 39（4）：423-429 doi: 10.12358/j.issn.1001-5620.2022.04.004
Citation: ZHAO Suli.Study on concentration responsive water thixotropic material and plugging technology of water bearing leakage layer[J]. Drilling Fluid & Completion Fluid，2022, 39（4）：423-429 doi: 10.12358/j.issn.1001-5620.2022.04.004
shu

Study on Concentration Responsive Water Thixotropic Material and Plugging Technology of Water Bearing Leakage Layer

doi: 10.12358/j.issn.1001-5620.2022.04.004
  • 1.

    Renewable R&D Center, Sinopec Star Petroleum Co., Ltd, Beijing 100083

  • 2.

    China National Research and Technology Center of Geothermal Energy, Beijing 100083

  • Received Date: 2022-02-23
  • Rev Recd Date: 2022-03-08
  • Publish Date: 2022-07-30
    Abstract
  • The conventional plugging slurry is easy to be diluted、replaced or washed away by formation water, so plugging in containing water formation is a worldwide problem. Therefore, a concentration responsive water thixotropic plugging agent has been developed, which including concentration responsive treatment agent SMF and solubilizer SMZ. The solution of water thixotropic agent has good fluidity, has a certain limition for the mixed water, and can still maintain good rheology and stability within the tolerance limition. However, when the water exceeds the tolerance limition, SMF will change to three dimensional network structure semisolid gels which has certain hardness、viscosity by self polymerize. Concentration response range and Limition of water can be adjusted by adjusting the ratio and dosage of SMF and SMZ, and a new water thixotropic plugging technology is developed. The water thixotropic bridging plugging slurry can be retained under flowing water, and the adhesion of the retained material in water reaches 1.166 MPa. Water thixotropic consolidation plugging slurry is not diluted by formation water and can be solidified in water. The plugging technology has applicated in SHB5-15H well,and successfully blocks the water bearing leakage layer. The plugging technology is simple preparated, and has good safety and strong underwater retention capacity. It provides a convenient、safe and efficient new plugging technology to solve the plugging problem of water bearing leakage layer, and has a good application prospect.

     

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