Smart lost circulation materials for wellbore strengthening

Ahmed Khaled Mansour, Arash Dahi Taleghani, Guoqiang Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

Lost circulation can be a very serious problem while drilling especially in naturally fractured formations. Lost circulation may have serious safety consequences and heavy financial costs in the form of losing mud fluid to the fractures, wellbore stability issues and losing rig time while dealing with the problem. Despite recent advances, lost circulation materials used in the field still have disadvantages such as plugging tools due to the large size of the particles, damaging production zones and failure to minimize lost circulation when heavy mud columns exists in the annulus. In this work, we introduce a new class of “Smart Lost Circulation Materials” to effectively seal the fractures and minimize lost circulation by increasing hoop stress. Our smart LCMs are made out of thermoset shape memory polymers which are activated upon exposure to the formation's in situ temperature that causes expansion and acts as an effective seal for the fractures. The physical properties of our smart lost circulation materials prevent damage to production zones and tool plugging. In addition, the expansive property of the smart LCM provides compressional forces that strengthen the wellbore by artificially reducing the fracture gradient. We conducted a series of experiments using a HPHT particle-plugging apparatus (PPA) to measure the sealing efficiency of the smart LCMs. In addition, a fully coupled CFD-DEM model is developed to further study the effectiveness of various particle size distributions and the corresponding stress release to improve the design of this product.

Original languageEnglish (US)
Title of host publication51st US Rock Mechanics / Geomechanics Symposium 2017
PublisherAmerican Rock Mechanics Association (ARMA)
Pages1825-1832
Number of pages8
ISBN (Electronic)9781510857582
StatePublished - Jan 1 2017
Event51st US Rock Mechanics / Geomechanics Symposium 2017 - San Francisco, United States
Duration: Jun 25 2017Jun 28 2017

Publication series

Name51st US Rock Mechanics / Geomechanics Symposium 2017
Volume3

Other

Other51st US Rock Mechanics / Geomechanics Symposium 2017
CountryUnited States
CitySan Francisco
Period6/25/176/28/17

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geophysics

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  • Cite this

    Mansour, A. K., Taleghani, A. D., & Li, G. (2017). Smart lost circulation materials for wellbore strengthening. In 51st US Rock Mechanics / Geomechanics Symposium 2017 (pp. 1825-1832). (51st US Rock Mechanics / Geomechanics Symposium 2017; Vol. 3). American Rock Mechanics Association (ARMA).