Study on the Effect of Humic Acid Acetamide on the Rheological Properties of Diesel Oil-Based Drilling Fluids

2014 ◽  
Vol 620 ◽  
pp. 449-452 ◽  
Author(s):  
Cha Ma ◽  
Long Li ◽  
Hu Lu ◽  
Xu Bo Yuan ◽  
Gang Wang
Keyword(s):  
Humic Acid ◽  
Chemical Modification ◽  
Rheological Properties ◽  
Good Alternative ◽  
Diesel Oil ◽  
Fluid Loss ◽  
Drilling Fluids

A new kind of humic acid acetamide compoud was synthesized by chemical modification of humic acid with octadecylamine, and the effect of humic acid acetamide on the rheological properties of oil-based drilling fluids was investigated. The results indicated that the humic acid acetamide had excellent dispersing property, and good capacity of depressing fluid loss. Moreover, the humic acid acetamide had better property of depressing fluid loss than oxidated asphalt. As a result, this humic acid acetamide is an excellent fluid loss agent for diesel oil-based drilling fluids, and is an good alternative to oxidated asphalt.

Study on the Effect of Humic Acid Acetamide on the Rheological Properties of Gas-to-Liquid Based Drilling Fluids

2014 ◽  
Vol 641-642 ◽  
pp. 447-450 ◽  
Author(s):  
Long Li ◽  
Xu Bo Yuan ◽  
Cha Ma ◽  
Rong Chao Cheng ◽  
Yu Ping Yang
Keyword(s):  
Humic Acid ◽  
Rheological Properties ◽  
Drilling Fluid ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
New Type ◽  
Gas To Liquid ◽  
The Stability ◽  
Filtration Properties ◽  
Fluid Loss Additive

A new type of humic acid acetamide FLHA was synthesized by chemical modification of humic acid with long chain fatty amine, and the effect of humic acid acetamide on the rheological properties of gas-to-liquid (GTL) based drilling fluids was investigated. The results indicated that FLHA had good capacity of filtration reduction under 150 °C. Moreover, FLHA can improve the stability of GTL-based drilling fluids. As a result, FLHA is an good fluid loss additive for GTL-based drilling fluids, and it can optimizate drilling fluid system formulation to make drilling fluids have good rheological properties, filtration properties and environmental protection function.

Development of a Polyacrylamide-Based Mud Formulation for Loss Circulation Treatments

2020 ◽  
Vol 143 (7) ◽  
Author(s):  
Musaab I. Magzoub ◽  
Saeed Salehi ◽  
Ibnelwaleed Hussein ◽  
Mustafa Nasser
Keyword(s):  
Rheological Properties ◽  
New Technologies ◽  
High Water ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Water Production ◽  
Large Size ◽  
Water Shutoff ◽  
Rheological Method ◽  
Selection Of

Abstract Loss circulation materials in the last two decades have witnessed a lot of developments and implementations. New technologies and materials are introduced to treat various types of loss zones. However, the success rate is still very low due to many uncertainties in the selection of types and particle size of the bridging materials. In addition, there are many operational restrictions such as the risk of plugging and pumping difficulties when large size of particle is needed, especially in deep-water drilling. In this study, polyacrylamide (PAM) crosslinked with polyethylenimine (PEI) is introduced as polymer-based mud for loss circulation treatment. The PAM/PEI systems have wide applications in water shutoff for high water production zones and are known for their strong gel and exceptional rheological properties. This study provides a rheological method for screening of PAM/PEI-based drilling formulation with optimized molecular weight and concentrations. Comparative analysis of rheology of non-crosslinked and crosslinked polyacrylamide with other drilling fluids additives as well as proper mixing procedures are provided. The results achieved in this study are used as a strong tool to design a polymer-based mud with competitive rheological properties which achieved an 80% reduction in fluid loss when compared with other conventional loss circulation materials.

Can Titanium and Copper Oxide Commercial Nanoparticles Be Used for HP/HT Applications? A Comparison With the Very Well Performing Fe3O4 NP

2018 ◽  
Author(s):  
Zisis Vryzas ◽  
Vassilios C. Kelessidis ◽  
Lori Nalbandian ◽  
Vassilios Zaspalis
Keyword(s):  
Iron Oxide ◽  
Copper Oxide ◽  
Rheological Properties ◽  
Yield Stress ◽  
Base Fluid ◽  
Drilling Fluid ◽  
Filter Press ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Custom Made

Smart drilling fluids, which can change their properties according to the flow environment, must be carefully designed so that they can handle the difficult challenges of HP/HT drilling successfully. Due to their unique physico-chemical properties, nanoparticles (NP) are considered as very good candidates for the formulation of these smart drilling fluids. This study presents filtration and rheological results of newly developed high-performance water-based drilling fluid systems containing different nanoparticles, commercial (C) titanium oxide (TiO2) and commercial (C) copper oxide (CuO) NP and compares them with results from using custom-made (CM) iron oxide (Fe3O4) NP and commercial (C) iron oxide (Fe3O4) NP, previously reported. Novel nano-based drilling fluids were made of de-ionized water, 7 wt% commercial Na-bentonite (base fluid), and NP were added at 0.5 wt%. The rheological properties of the produced suspensions were measured at temperatures up to 60°C and at atmospheric pressure with a Couette-type viscometer. Filtration characteristics were determined at elevated pressures and temperatures in a HP/HT filter press (500 psi/176°C) using ceramic discs as filter media, of permeability, k = 775 mD. The results of this study showed that the samples containing 0.5 wt% C TiO2 caused a reduction in the fluid loss by 23%, while C CuO NP resulted in 16% reduction, when compared to that of the base fluid, at these HPHT conditions. This should be compared to the 47% and 34% reduction in fluid loss of 0.5% CM Fe3O4 NP and of 0.5% of C Fe3O4 NP, reported previously. Analysis of rheological data revealed shear-thinning behavior for all the tested novel drilling fluids. The samples containing TiO2 and CuO NP exhibited a yield stress less than that of the base fluid, compared to the increased yield stress observed for the C and CM Fe3O4 NP. This behavior can be attributed to the fact that TiO2 and CuO NP may also act as deflocculants and prevent the gelation of bentonite suspensions. This study shows that commercial nanoparticles of TiO2 and CuO do not perform as well as the Fe3O4 NP on filtration but provide drilling fluids with lower yield stresses, thus they could be considered as alternatives to Fe3O4 in situations where the rheological properties are critical.

Synthesis and Characterization of Substituted-Ammonium Humic Acid Fluid Loss Additive for Oil-Based Drilling Fluids

2014 ◽  
Vol 1004-1005 ◽  
pp. 623-626 ◽  
Author(s):  
Cha Ma ◽  
Long Li ◽  
Gang Wang ◽  
Xu Bo Yuan
Keyword(s):  
Humic Acid ◽  
New Product ◽  
Extreme Condition ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Reaction Conditions ◽  
Acid Fluid ◽  
Optimal Reaction ◽  
Fluid Loss Additive

Using widely distributed and cheap lignite as starting material, humic acid was modified by octadecylamine, and a new kind of humic acid acetamide was prepared. The optimal reaction conditions of the humic acid acetamide polymer were obtained through laboratory tests as follow: the ratio of of humic acid and octadecylamine was 1:1.5, the reaction temperature was 150 °C, and the reaction time was 16~18 h. The new product was characterized by IR, and the results showed that this substituted-ammonium humic acid was successfully prepared by reacting parts of carboxyl group of humic acid with octadecylamine. HTHP filtration experiments demonstrated that the substituted-ammonium humic acid had good fluid loss properties. As a result, this substituted-ammonium humic acid polymer is an excellent fluid loss additive, and it could meet the requirement of drilling operation under extreme condition.

Analysis of Fluid Loss-Reducing Mechanism of Humic Acid Acetamide Compound with Lipophilic Property

2014 ◽  
Vol 1004-1005 ◽  
pp. 891-894 ◽  
Author(s):  
Cha Ma ◽  
Long Li ◽  
Xu Bo Yuan ◽  
Rong Chao Cheng ◽  
Gang Wang
Keyword(s):  
Humic Acid ◽  
Liquid Phase ◽  
Flow Resistance ◽  
Water Soluble ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Fluid Loss Additive

Humic acid acetamide compounds with lipophilic property could dissolve or disperse in oil phase, so they were an important fluid loss additive for oil-based drilling fluids. Compared with water-soluble humic acid derivatives, the fluid loss-reducing mechanism of them was different. With analyzing the mechanism of increasing the flow resistance of liquid phase, bridging plugging, plugging pore and improving the quality of mudcake, the fluid loss-reducing mechanism of lipophilic humic acid acetamide compounds is investigated.

scholarly journals Carboxylated Cellulose Nanocrystals as Environmental-Friendly and Multi-Functional Additives for Bentonite Water-Based Drilling Fluids Under High-temperature Conditions

2021 ◽  
Author(s):  
Xinliang Li ◽  
Kai Wang
Keyword(s):  
Rheological Properties ◽  
Cellulose Nanocrystals ◽  
Colloidal Stability ◽  
Free Water ◽  
Environmentally Friendly ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Gas Drilling ◽  
Water Based ◽  
Gel Network

Abstract During the oil and gas drilling engineering, the selection of drilling fluids must take account of the technical and environmental factors. This study investigated the effectiveness of carboxylated cellulose nanocrystals (denoted as CNCs) as environmentally friendly additives in improving the rheological, filtration, and inhibitive performances of bentonite (BT) water-based drilling fluids (WBDFs). CNCs used in this study were modified by carboxylation reaction, displaying small size, negative surface charge, good colloidal stability, and prominent shear thinning behavior. The experimental results indicated that BT/CNC suspensions had superior rheological properties, low fluid loss volumes, and effective inhibition, even at 140 °C. Microstructure analysis demonstrated that CNCs could attach to the surface of BT via hydrogen bond and ionic bond. CNCs, BT, and vicinal water molecules could form a stiff gel network, which had a strong resistance to flow under shear force, leading to a significant improvement in the rheological properties. Moreover, under the differential pressure, BT/CNC suspensions formed thin and less hydrophilic filter cakes with compact layered structure, thereby efficiently decreasing the fluid loss volume. Finally, due to the gel network and filtration ability, BT/CNC suspensions performed low water activity, which was beneficial for preventing the penetration of free water into the shales and borehole well. Thus CNCs also exerted satisfactory inhibition on hydration and dispersion of BT and shales. As a result, CNCs showed great potential to be used as efficient, multi-functional, and environmentally friendly additives in WBDFs.

scholarly journals Investigation of regulating rheological properties of water-based drilling fluids by ultrasound

2021 ◽  
Author(s):  
Wei-An Huang ◽  
Jing-Wen Wang ◽  
Ming Lei ◽  
Gong-Rang Li ◽  
Zhi-Feng Duan ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Drilling Fluids ◽  
Water Based

Development of a Reproducible Method of Formulating and Testing Drilling Fluids

1969 ◽  
Vol 9 (04) ◽  
pp. 403-411 ◽  
Author(s):  
B.K. Sinha ◽  
Harvey T. Kennedy
Keyword(s):  
Large Scale ◽  
Drilling Fluid ◽  
Flow Characteristics ◽  
Field Testing ◽  
Test Methods ◽  
Water Evaporation ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Testing Procedures ◽  
Asymptotic Values

Abstract Recommendations are made for obtaining consistent and reproducible test data on drilling fluids having identical composition. Previously, such a procedure has been difficult to accomplish even when the fluids were mixed in similar equipment. A survey of work in this area indicates that previous methods have been unsatisfactory because previous methods have been unsatisfactory because (1) the muds are extremely sensitive to the duration and violence of agitation during a normal mixing routine, and (2) gelling of the muds occurs before the properties can reach constant values. This gelling is caused by water evaporation resulting from the increase in temperature associated with the agitation. The work shows that these problems largely can be overcome by (1) agitating the constituents of the drilling fluid more vigorously, (2) maintaining a fairly constant temperature, and(3) Protecting the fluid from evaporation. When these steps are followed, the fluid properties approach asymptotic values that do not change by prolonged or accelerated agitation or by aging for a month. The time required to reach asymptotic values or a stabilized state is from 2 to 6 hours and is a function of the mud composition. Introduction Preparation of drilling fluids in the laboratory to determine their suitability to meet specific drilling requirements or to serve as a base fluid to evaluate the effectiveness of thinners, dispersants or other additives normally begins with combining measured quantities of the constituents and stirring them for a short time in a low-speed mixer. This is done to obtain a uniform mixture and to hydrate clays. Then the fluid is further agitated in a higher-speed device (Hamilton Beach mixer or Waring blender) to disperse more thoroughly and clay particles The biggest obstacle in the laboratory investigation of drilling fluids has been the lack of a method of producing a mixture by which reproducible results of the measured properties could be obtained. Numerous investigators have encountered this difficulty. Prior to 1929, density was the only property of mud that customarily was measured. The use of Wyoming bentonite on a large scale after 1929 was mainly responsible for the development of more elaborate testing procedures and for the application of the principles of colloid chemistry to the drilling fluids. Ambrose and Loomis in 1931 were among the first to recognize the plastic flow characteristics of drilling fluids, although Bingham in 1916 had observed The same phenomenon with dilute clay suspensions. Marsh introduced the Marsh funnel for field testing in 1931. By this time, non-Newtonian characteristics of drilling fluids were established. The Stormer and MacMichael viscometers were used to study the rheological properties of the fluids. In the 1930's and early 1940's, the work conducted by several investigators contributed toward a better understanding of drilling fluids. In the mid 1930's, fluid-loss and the associated mud-cake-forming properties of drilling fluids were recognized as important to the behavior of these fluids. The other properties of drilling fluids, including gel strength, pH, and sand content soon were recognized. In 1937, API published its first recommended procedure for test methods. Since that time, these procedures have been revised periodically. The latest edition, RP-13B, was published in 1961 However, in spite of the recognized need for a method of mixing that provides drilling fluids with stabilized properties, no such method previously has been described. SPEJ P. 403

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