scholarly journals Integrated Mineral Analysis of sandstone and dolomite formations using different chelating agents during matrix acidizing

Petroleum ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 67-76 ◽  
Author(s):  
Mian Umer Shafiq ◽  
Hisham Khaled Ben Mahmud ◽  
Mohsen Ghasemi
Keyword(s):  
Chelating Agents ◽  
Mineral Analysis ◽  
Matrix Acidizing

Effective Matrix Acidizing Based in Chelating Agents: A Case Study in Romanian Heavy Oil Reservoirs

2018 ◽  
Author(s):  
Emil Panait ◽  
Constantin Isac ◽  
Csaba Marton ◽  
Arlinda Dos Santos ◽  
Stefano Girardi
Keyword(s):  
Heavy Oil ◽  
Chelating Agents ◽  
Oil Reservoirs ◽  
Matrix Acidizing ◽  
Heavy Oil Reservoirs ◽  
Effective Matrix

Evaluation of a New Environmentally Friendly Chelating Agent for High-Temperature Applications

SPE Journal ◽  
2011 ◽  
Vol 16 (03) ◽  
pp. 559-574 ◽  
Author(s):  
M.A.. A. Mahmoud ◽  
H.A.. A. Nasr-El-Din ◽  
C.A.. A. De Wolf ◽  
J.N.. N. LePage ◽  
J.H.. H. Bemelaar
Keyword(s):  
Carbonate Rocks ◽  
Chelating Agents ◽  
Oil And Gas ◽  
Environmentally Friendly ◽  
Chelating Agent ◽  
Reaction Rates ◽  
Acid Dissolution ◽  
Matrix Acidizing ◽  
Good Ability ◽  
Wide Range

Summary Matrix acidizing is used in carbonate formations to create wormholes that connect the formation to the wellbore. Hydrochloric acid (HCl), organic acids, or mixtures of these acids are typically used in matrix-acidizing treatments of carbonate reservoirs. However, the use of these acids in deep wells has some major drawbacks, including high and uncontrolled reaction rates and corrosion to well tubulars, especially those made of chromium-based tubulars (Cr-13 and duplex steel); and these problems become severe at high temperatures. To overcome problems associated with strong acids, chelating agents were introduced and used in the field. However, major concerns with most of these chemicals are their limited dissolving power and negative environmental impact. L-glutamic acid diacetic acid (GLDA), a newly developed environmentally friendly chelate, was examined as a replacement for acid treatments in deep oil and gas wells. The solubility of calcium carbonate (CaCO3) in the new chelate was measured over a wide range of parameters. Coreflood tests were conducted using long Indiana limestone cores 1.5 in. in diameter and 20 in. in length, which allowed better understanding of the propagation of this chemical in carbonate rocks. The cores were X-ray scanned before and after the injection of chelate solutions into the cores. The concentration of calcium (Ca) and chelate was measured in the core effluent samples. To the best of our knowledge, this is the first study to examine the fate and propagation of chelating agents in coreflood studies. GLDA has a very good ability to dissolve Ca from carbonate rocks over a wide pH range by a combination of acid dissolution and chelation. The addition of 5 wt% sodium chloride (NaCl) did not affect the GLDA performance at pH = 13 but significantly accelerated the reaction at pH = 1.7. Compared with other chelating agents, GLDA dissolved more Ca than ethanoldiglycinic acid (EDG) but less than hydroxyethyl ethylenediamine triacetic acid (HEDTA) at high pH values. GLDA of pH = 1.7 was able to form wormholes at 2 and 3 cm3/min. GLDA was found to be thermally stable at temperatures up to 350°F.

scholarly journals Investigation of change in different properties of sandstone and dolomite samples during matrix acidizing using chelating agents

2019 ◽  
Vol 9 (4) ◽  
pp. 2793-2809 ◽  
Author(s):  
Mian Umer Shafiq ◽  
Hisham Khaled Ben Mahmud ◽  
Muhammad Khurram Zahoor ◽  
Arshad S. A. Shahid ◽  
Reza Rezaee ◽  
...  
Keyword(s):  
Chelating Agents ◽  
Matrix Acidizing

scholarly journals Investigation of Changing Pore Topology and Porosity During Matrix Acidizing using Different Chelating Agents

2017 ◽  
Vol 217 ◽  
pp. 012023 ◽  
Author(s):  
Mian Umer Shafiq ◽  
Hisham Khaled Ben Mahmud ◽  
Reza Rezaee ◽  
Nadia Testamanti
Keyword(s):  
Chelating Agents ◽  
Matrix Acidizing

Automated mineral analysis in TASK8

1990 ◽  
Vol 48 (2) ◽  
pp. 212-213
Author(s):  
William F. Chambers ◽  
Arthur A. Chodos ◽  
Roland C. Hagan
Keyword(s):  
National Laboratory ◽  
Control Program ◽  
Mineral Analysis ◽  
Alamos National Laboratory ◽  
Mineral Phase ◽  
Los Alamos National Laboratory ◽  
California Institute Of Technology ◽  
Mineral Phases ◽  
Letter Code ◽  
Institute Of Technology

TASK8 was designed as an electron microprobe control program with maximum flexibility and versatility, lending itself to a wide variety of applications. While using TASKS in the microprobe laboratory of the Los Alamos National Laboratory, we decided to incorporate the capability of using subroutines which perform specific end-member calculations for nearly any type of mineral phase that might be analyzed in the laboratory. This procedure minimizes the need for post-processing of the data to perform such calculations as element ratios or end-member or formula proportions. It also allows real time assessment of each data point.The use of unique “mineral codes” to specify the list of elements to be measured and the type of calculation to perform on the results was first used in the microprobe laboratory at the California Institute of Technology to optimize the analysis of mineral phases. This approach was used to create a series of subroutines in TASK8 which are called by a three letter code.

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