Volume 34 Issue 6
Nov.  2017
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HE Zhong, LIU Jinhua, FANG Jing, HU Ziqiao. Laboratory Study on Ultra-high Temperature Temporary Plugging Agent SMHHP[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(6): 18-23. doi: 10.3969/j.issn.1001-5620.2017.06.004
Citation: HE Zhong, LIU Jinhua, FANG Jing, HU Ziqiao. Laboratory Study on Ultra-high Temperature Temporary Plugging Agent SMHHP[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(6): 18-23. doi: 10.3969/j.issn.1001-5620.2017.06.004
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Laboratory Study on Ultra-high Temperature Temporary Plugging Agent SMHHP

doi: 10.3969/j.issn.1001-5620.2017.06.004

  • 1. Research Center of Petroleum Engineering Technology, Sinopec Northwest Oil Field Company, Urumqi, Xinjiang 830011;

  • 2. Sinopec Research Institute of Petroleum Engineering, Beijing 100101;

  • 3. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101

  • Received Date: 2017-08-14
  • Publish Date: 2017-11-30
    Abstract
  • A temporary plugging agent SMHHP has been developed to satisfy the needs of temporary plugging in ultra-high temperature reservoirs. SMHHP is composed of particle material, fiber material, elastic material and nanophase material which are in reasonable ratios. The sizing and selection of particles was based on ideal packing theory. A high temperature highly acid soluble fiber was introduced into SMHHP to improve the stability of the plugged formations. Considering the poor adaptability of particle sizes to the sizes of pores to be plugged because of the irregularity of particles during processing, a high temperature elastic material was added into SMHHP. Tiny pores formed in bridging can be further precisely packed with nanophase material, thereby improvingthe compactability of plugged formations. SMHHP only slightly affect mud rheology, and has high temperature resistance, strong sealing ability, goodtemporary plugging effect and high acid solubility. SMHHP functioned normally at 200℃. Test performed with SMHHP slurry on 0.2 mm fractures showed that pressure bearing capacity of more than 7 MPa can be achieved. Filtration depth of SMHHP slurry on sand bed with 0.28-0.90 mm sand particles was less than 3 cm. Percent permeability recovery of cores contaminated with SMHHP slurry was greater than 93.9%. Acid solubility of SMHHP was greater than 82.1%. SMHHP can be used in reservoirs of ultrahigh temperatures, protecting the reservoirs from being damaged.

     

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