Volume 37 Issue 4
Aug.  2020
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HU Jinjun, XIAO Weiwei, DENG Yicheng, XU Tongtai, CHEN Zhonghua. Investigation on Experimental Methods and Evaluation of Tight Gas Reservoir Damage[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 488-493. doi: 10.3969/j.issn.1001-5620.2020.04.014
Citation: HU Jinjun, XIAO Weiwei, DENG Yicheng, XU Tongtai, CHEN Zhonghua. Investigation on Experimental Methods and Evaluation of Tight Gas Reservoir Damage[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 488-493. doi: 10.3969/j.issn.1001-5620.2020.04.014

Investigation on Experimental Methods and Evaluation of Tight Gas Reservoir Damage

doi: 10.3969/j.issn.1001-5620.2020.04.014
  • Received Date: 2020-03-23
  • Publish Date: 2020-08-28
  • A tight gas reservoir generally has low porosity, low permeability, high water saturation, high stress sensitivity and high clay content, the gas permeability of the tight gas reservoir is generally less than 0.001 mD. Gas reservoir damage is thus different from oil reservoir damage because of these characteristics. Presently there is no commonly agreed method for evaluating tight (included fractured) gas reservoir damage worldwide. In the common reservoir sensitivity evaluation method a liquid is used as displacing medium. This method is time consuming and is subject to great experimental errors and stress sensitivity. To overcome these shortages, a new evaluation method was developed based on the study of tight (including fractured) gas reservoir damage, and a set of procedure developed to evaluate the damage to tight (porous and fractured) gas reservoirs. Using this new method, reservoir cores from the block BZ19-25 was evaluated, giving results that were consistent to those obtained with standard industrial methods. This proves that the new method is reliable and is suitable for evaluating damage to porous and fractured gas reservoirs.

     

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