PETE 225 Lab 5

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Texas A&M University *

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225

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Chemistry

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Feb 20, 2024

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To: Vivekvardhan Kesireddy From: Brendon Beckendorff PETE 225-504 Partners: Matthew Gassert, Jonathon Valdez, Jacob Gonzalez Subject: Lab NO 5: Methylene Blue Capacity Date: March 24, 2022 The goal of this experiment is to use a methylene blue capacity test on three different mud samples to determine the number of reactive clays present. To test our muds, we started by making a solution in an Erlenmeyer including water, mud, hydrogen peroxide, and sulfur solution to be heated and distilled. Once this is done, we would run our capacity test by adding methylene blue solution until greenish blue appears around the dye solids. We would then repeat this process for the other samples and determine our capacities for each. “On my honor as an Aggie, I have neither given nor received unauthorized aid on this academic work.” Brendon Beckendorff

Methylene Blue Capacity The objective of this experiment is to test the number of reactive solids in each of our mud mixtures using the methylene blue capacity process. To begin this test, we had to make three separate mud bases that consisted of water, barite, and bentonite. We then made a solution using our mud, water, hydrogen peroxide, and sulfuric solution that would be our main testing solution for this experiment. This flask was then boiled and diluted until the total volume was 50 cc. Methylene blue solution was then added until a greenish blue dye appeared around the dye solids. The volume of methylene blue added, and the volume of drilling fluid used could then be used to solve for our methylene blue capacity. This experiment would lead us to believe that our sample with added bentonite would have the highest methylene blue capacity and highest amount of reactive solids. Conclusions • The mud with additional bentonite had the highest methylene blue capacity • The mud with additional barite had the lowest methylene blue capacity • Bentonite mixture would have the most amount of reactive solids and be the most useful in drilling Discussion and Results This experiment starts by the making of three separate mud mixtures. The base mud consists of 500 cc of water, 20 grams of barite, and 5 grams of bentonite. The next mixture consists of the base plus an additional 10 grams of barite. The third mixture consists of the base plus an additional 10 grams of bentonite. Next, we would create three separate testing solutions in Erlenmeyer flasks. These solutions consisted of 10 cc water, 2 cc drilling fluid, 15 cc hydrogen peroxide, and 1 cc of sulfuric solution. This flask was then brought to a boil then diluted with distilled water until its volume was 50 cc. Methylene blue solution was then added 1 cc at a time then shaken until a greenish blue color appeared around the dye solids when extracted. This process was repeated for all three of our mud samples. The amount of methylene blue solution added, and the original volume of mud added can then be used to calculate our capacity of methylene blue using Equation 1 . This experiment shows us that our mud with the additional bentonite would take the most volume of methylene blue to change color and therefore have the highest capacity. Where as our mud samples with additional barite and the base by itself produced similar results in their respected capacities. This experiment demonstrates how our mixture with added bentonite would have the higher amount of reactive solids. More reactive solids are useful in drilling since they aid in forming mud cakes and often increase the viscosity of the drilling fluid. 𝑀??ℎ𝑦???? ???? ?𝑎?𝑎?𝑖?𝑦 = (𝑉????? ?? 𝑀??ℎ𝑦???? ∗ 5)/(𝑉????? ?? ?𝑟𝑖??𝑖?? 𝐹??𝑖? 𝑆𝑎????) Equation 1 Sample: 9(??)∗5 2(??) = 22.5 ( 𝑙? ??𝑙 ) Table 1-Methylene Blue Capacity of Different Samples Sample Methylene Blue Solution(cc) Methylene Blue Capacity(lb/bbl) Base 9 22.5 Base+Bentonite 12 30 Base+Barite 8 20 Questions 1. Reactive solids are chemicals that react with water and other substances that often increase the viscosity of the drilling fluid. 2. An inert solid is one that is not reactive, such as barite. They can often increase the weight or density of the fluid.

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