Volume 33 Issue 4
Jul.  2016
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WU Hongjun, KONG Chang'e, YI Xiangyi, ZHANG Hui, LIU Hui, WU Yuanqin. Numerical Analysis of Acid-Corroded Wormholes in Fractured Carbonate Rocks[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(4): 105-108. doi: 10.3969/j.issn.1001-5620.2016.04.022
Citation: WU Hongjun, KONG Chang'e, YI Xiangyi, ZHANG Hui, LIU Hui, WU Yuanqin. Numerical Analysis of Acid-Corroded Wormholes in Fractured Carbonate Rocks[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(4): 105-108. doi: 10.3969/j.issn.1001-5620.2016.04.022
shu

Numerical Analysis of Acid-Corroded Wormholes in Fractured Carbonate Rocks

doi: 10.3969/j.issn.1001-5620.2016.04.022

  • 1. Research Institute of Oil and Gas Engineering, Tarim Oilfield Division, Korla, Xinjiang 841000;

  • 2. College of Energy Resources, Chengdu University of Technology, Chengdu, Sichuan 610059;

  • 3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059

  • Received Date: 2016-04-26
  • Publish Date: 2016-07-31
    Abstract
  • Acid-corroded wormholes generated in acid fracturing of carbonate rocks play an important role in flow channel communication. A quantitative characterization of the surface of the fracture planes before and after acid corrosion has not yet been found. The acidcorroded wormholes can be quantitatively characterized with a 3D laser scanner which scans the surface of the fracture planes before and after filtration of acid and numerically processes the data obtained. Studies show that the isogram and the 3D plots of the fracture planes give a clear picture of the acid-corroded wormholes. The dimensions of different spots in a wormhole can be obtained from the isogram and 3D plots of the fracture spacings. The number and the proportion of the cloud points of the different spacings in acidcorroded wormholes can be obtained from the matching histogram of the fracture planes and the histogram of the spacing distribution of the fractures. Using these data, the volume of the acid-corroded wormholes can be calculated, providing guidance to acid fracturing design.

     

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    • References(8)
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