Volume 36 Issue 2
Apr.  2019
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2019  >  36(2): 160-164
ZHU Jinzhi, XU Tongtai, WU Xiaohua, HU Risu, LUO Wei, REN Lingling. The Effects of Weight Materials on the Performance of High Temperature Ultra-high-density Diesel Oil Base Drilling Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(2): 160-164. doi: 10.3969/j.issn.1001-5620.2019.02.005
Citation: ZHU Jinzhi, XU Tongtai, WU Xiaohua, HU Risu, LUO Wei, REN Lingling. The Effects of Weight Materials on the Performance of High Temperature Ultra-high-density Diesel Oil Base Drilling Fluid[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(2): 160-164. doi: 10.3969/j.issn.1001-5620.2019.02.005
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The Effects of Weight Materials on the Performance of High Temperature Ultra-high-density Diesel Oil Base Drilling Fluid

doi: 10.3969/j.issn.1001-5620.2019.02.005

  • 1. Research Institiute of Oil and Gas Engineering Tarim Oilfield Company, Petrochina, Korla, Xinjiang 841000;

  • 2. Beijing Shidahuyang Petroleum Sci. & Tech. Development Co., Ltd., Beijing 102200

  • Received Date: 2018-11-12
  • Publish Date: 2019-04-30
    Abstract
  • High temperature ultra-high-density oil base drilling fluids have long been used in drilling the salt/gypsum formations of the Kumugeliemu group in Kuche piedmont area in Tarim Basin. Oil base drilling fluids used in this area should have good rheology, low HTHP filtration rate, good plugging capacity and dynamic/static settling stability. This paper discusses the effects of different weighting agents on the properties of a high temperature (160℃) ultra-high-density diesel oil base drilling fluid. The performance of an ultra-high-density diesel oil base drilling fluid formulated with single weighting agent, such as barite with density of 4.2 g/cm3, barite with density of 4.3 g/cm3, iron oxide powder or Microdense, cannot satisfy all the needs of drilling engineering. A weighting agent MicroMax, which is an ultra-fine, high density and spherical powder was then used to formulate the required oil base drilling fluid. The MicroMax weighted oil base drilling fluid had excellent rheology and good settling stability, the HTHP filtration rate of the drilling fluid was out of control though. Using a weighting material mixed with 60% barite and 40% MicroMax, a high temperature ultra-highdensity (2.4-3.0 g/cm3) diesel oil base drilling fluid with good properties was formulated; it can satisfy all the needs of drilling high pressure saltwater zones and hole sections in which mud losses are easy to take place.

     

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