Study and Application of a New Complex Plug Removal System

SHI Jin, HE Licheng, WANG Xiaoyu


Aiming at solving small effective acid reaction range and causing second damage in the acidizing in low permeability reservoirs, a new kind of deep penetration and little damage complex plug removal system was developed through laboratory research, which consists of an organic acid, a phosphoric acid, an ammonium organic acid, an ammonium fluoride and a strong oxidizer. The properties were evaluated and the results indicate that it has advantages of proper dissolving capacity to rock with dissolving ratio of 38.9%, little corrosion to the pipeline of equipment with corrosion rate of 2.9 g/m2·h-1, low interfacial tension, anti-acid-sludge, and ability to stabilize ferric ion. The plugging in deep formations can be removed with low damage to rock skeleton, which the damage rate is less than 20%. It has been applied in 19 wells with success ratio of 100% and long term of validity, average validity is more than 200 days. The oil production and water injection have been increased obviously.
Key words: Acidization; Second damage; Complex plug removal system; Deep penetration; Rock skeleton


Acidization; Second damage; Complex plug removal system; Deep penetration; Rock skeleton

Full Text:



[1] Li, D. P. (1997). Exploration of Sand Oilfield with Low Permeability (pp. 166-168). Beijing: Petroleum Industry Press.

[2] Ali, S. A., et al. (2006, February). Effective Stimulation of High-Temperature Sandstone Formations in East Venezuela with a New Sandstone-Acidizing System. International Symposium and Exhibition on Formation Damage Control, Lafayette, Louisiana U.S.A.

[3] Uchendu, C., Obadare, A., & Nwoke, L. (2004). Solvent/Acid Blend Provides Economic Single Step Matrix Acidizing Success for Fines and Organic Damage Removal in Sandstone Reservoirs: a Niger-Delta Case Study. SPE Annual Technical Conference and Exhibition, 26-29 September 2004, Houston, Texas.

[4] Pongratz, R., Kontarev, R., & Robertson, B. (2005, May). Optimizing Matrix Acid Treatments in a Multi-Layered Reservoir in Russia by Applying Different Diversion Techniques. SPE European Formation Damage Conference, Sheveningen, The Netherlands.

[5] Selle, O. M., et al. (2004, September). Gelled Organic Acid System for Improved CaCO3 Removal in Horizontal Openhole Wells at the Heidrun Field. SPE Annual Technical Conference and Exhibition, Houston, Texas.

[6] Nwoke, L., et al. (2004, April). Phosphonic Acid Complex for Stimulating HF-Sensitive Reservoirs - a Revolutionary Response. SPE/DOE Symposium on Improved Oil Recovery, Tulsa, Oklahoma.

[7] Zhou, W. F., Kang, Y., & Wang, X. (2005). Reaction Capacity of Different Acid Systems on Natural Core. Journal of Daqing Petroleum Institute, 29(5), 48-50.



  • There are currently no refbacks.

Copyright (c)

Share us to:   


  • How to do online submission to another Journal?
  • If you have already registered in Journal A, then how can you submit another article to Journal B? It takes two steps to make it happen:

1. Register yourself in Journal B as an Author

  • Find the journal you want to submit to in CATEGORIES, click on “VIEW JOURNAL”, “Online Submissions”, “GO TO LOGIN” and “Edit My Profile”. Check “Author” on the “Edit Profile” page, then “Save”.

2. Submission

  • Go to “User Home”, and click on “Author” under the name of Journal B. You may start a New Submission by clicking on “CLICK HERE”.

We only use three mailboxes as follows to deal with issues about paper acceptance, payment and submission of electronic versions of our journals to databases:;;

 Articles published in Advances in Petroleum Exploration and Development are licensed under Creative Commons Attribution 4.0 (CC-BY)


Address:1020 Bouvier Street, Suite 400, Quebec City, Quebec, G2K 0K9, Canada.

Telephone: 1-514-558 6138
Website: Http://

Copyright © 2010 Canadian Research & Development Centre of Sciences and Cultures