Document Type

Journal Article

Publication Title

Fuel

Volume

317

Publisher

Elsevier

School

Centre for Sustainable Energy and Resources

Funders

National Natural Science Foundation of China (Grant No. 51604236),

Sichuan Province Science and Technology Project (Grant No. 2018JY0436),

Open Fund (Grant No. 21-GJ-KF-10) of State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Open Fund (Grant No. PLN2020-15) of State Key Laboratory of Oil and Gas Reservoir Geology and exploitation (South-west Petroleum University),

Sichuan Province Youth Science and Technology Innovation Team Project (Grant No. 2021JDTD0017)

Grant Number

PLN2020-15

Comments

This is an Authors Accepted Manuscript version of an article published by Elsevier at: Xu, C., Zhang, H., Kang, Y., Zhang, J., Bai, Y., Zhang, J., & You, Z. (2022). Physical plugging of lost circulation fractures at microscopic level. Fuel, 317, article 123477. https://doi.org/10.1016/j.fuel.2022.123477

Xu, C., Zhang, H., Kang, Y., Zhang, J., Bai, Y., Zhang, J., & You, Z. (2022). Physical plugging of lost circulation fractures at microscopic level. Fuel, 317, article 123477.

https://doi.org/10.1016/j.fuel.2022.123477

Abstract

Drilling fluid loss into formation fractures is one of the most common and costly problems encountered during the exploration and development of oil and gas resources. At present, the most extensive solution is to use physical lost circulation materials (LCMs) to form high-strength plugging zone in fractures. However, it is still unclear how the plugging is initiated and formed in the fracture. In this paper, a microscopic visualization experimental device for the formation of plugging zone is used to observe the dynamic plugging performance of spherical materials, flaky materials and fibers in fracture. Experimental results show that the formation of fracture plugging zone can be divided into retention stage and plugging stage. Spherical materials have three main retention modes: single-particle straining, dual-particle bridging and multi-particle bridging. Flaky materials assist the retention and plugging of spherical materials through three modes: embedded, intercepted and supported. Fibers take part in the retention of spherical materials through three ways: forming a net at the entrance of the fracture, forming a net after bridging the particle materials, and transverse filling in the fracture. The results achieved in this work provide a basis for the selection and design of LCMs for lost circulation control in deep fractured tight reservoir.

DOI

10.1016/j.fuel.2022.123477

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Available for download on Saturday, June 01, 2024

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