scholarly journals Experimental Research of Shale Pellet Swelling in Nano-Based Drilling Muds

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6246
Author(s):  
Borivoje Pašić ◽  
Nediljka Gaurina-Međimurec ◽  
Petar Mijić ◽  
Igor Medved
Keyword(s):  
Calcium Carbonate ◽  
Zeta Potential ◽  
Experimental Research ◽  
Petroleum Industry ◽  
Laboratory Research ◽  
Drilling Mud ◽  
Wellbore Instability ◽  
Shale Formation ◽  
Drilling Muds ◽  
Mud Filtrate

The drilling of clay-rich formations, such as shale, is an extremely demanding technical and technological process. Shale consists of mixed clay minerals in different ratios and in contact with water from drilling mud. It tends to swell and cause different wellbore instability problems. Usually, the petroleum industry uses various types of salt and/or polymers as shale hydration inhibitors. The aim of this research was to determine whether nanoparticles can be used as shale swelling inhibitors because due to their small size they can enter the shale nanopores, plug them and stop further penetration of mud filtrate into the shale formation. Swelling of bentonite-calcium carbonate pellets after 2 and 24 h in water and drilling mud (water, bentonite, PAC and NaOH) without nanoparticles and with addition of TiO2 (0.5, 1 and 1.5 wt%) and SiO2 (0.5, 1 and 1.5 wt%) nanoparticles was measured using a linear swell meter. Additionally, granulometric analyses of bentonite as well as the zeta potential of tested muds containing nanoparticles were performed. Based on the laboratory research, it can generally be concluded that the addition of SiO2 and TiO2 nanoparticles in water and base drilling mud reduces the swelling of pellets up to 40.06%.

An Integrated Approach to Efficient Drilling through Unstable Coal Intervals Using Different Types of Mud in the Yamal Region

2021 ◽  
Author(s):  
Alexander Viktorovich Kabanov ◽  
Aydar Ramilevich Galimkhanov ◽  
Andrey Borisovich Kharitonov ◽  
Alexander Mikhailovich Matsera ◽  
Valery Viktorovich Pogurets ◽  
...  
Keyword(s):  
Drilling Fluid ◽  
Integrated Approach ◽  
Drilling Mud ◽  
Wellbore Instability ◽  
Engineering Approach ◽  
Well Design ◽  
Drilling Muds ◽  
Productive Time ◽  
Nenets Autonomous ◽  
Selection Of

Abstract This article is a description of an integrated engineering approach to solutions selection for efficient and safe drilling of unstable intervals represented by interbedded coal and argillite layers. Due to specific features of these formations, any significant mechanical stress, as well as penetration of drilling fluid filtrate, may lead to wellbore instability regardless of the drilling mud type used. The paper presents a description of the features of drilling in unstable intervals with various types of drilling muds (WBM/OBM) in Yamalo-Nenets Autonomous Okrug (YNAO). Experience has shown that drilling through coal intervals prone to instability may cause significant non-productive time (NPT). Such wells should be designed with an integrated engineering approach, which covers the entire cycle: starting with the well path planning, casing setting depths selection, BHA design and drilling regimes of the risk interval. No less important, detailed development of solutions for drilling muds. During the study the main causes of issues in wells drilled through the interbedded formations of coal and argillites in two fields were identified. As a result, a set of measures was developed to minimize risks for each type of mud (OBM and WBM): – Revision of the initial well design solutions. Selection of optimal mud weight based on the experience gained and the geomechanical model – Revision of chemicals concentrations together with the use of additional additives – Placement of stabilizing pills across unstable intervals – Well path optimization – Development of safe drilling procedures. The measures developed for various types of drilling muds allowed minimizing the NPT and successfully completing the wells on time. The experience gained formed the basis for recommendations to prevent issues associated with the coal layers instability in the region.

scholarly journals Modification of DS-01 Drilling Fluid to Reduce Formation Damage

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Winarto S. ◽  
Sugiatmo Kasmungin
Keyword(s):  
Oil And Gas ◽  
Drilling Fluid ◽  
Laboratory Research ◽  
Formation Damage ◽  
Drilling Fluids ◽  
Drilling Mud ◽  
Initial Flow ◽  
Lost Circulation ◽  
Negative Impacts ◽  
Drilling Muds

<em>In the process of drilling for oil and gas wells the use of appropriate drilling mud can reduce the negative impacts during ongoing drilling and post-drilling operations (production). In general, one of the drilling muds that are often used is conventional mud type with weighting agent barite, but the use of this type of mud often results in skin that is difficult to clean. Therefore in this laboratory research an experiment was carried out using a CaCO3 weigting agent called Mud DS-01. CaCO3 is widely used as a material for Lost Circulation Material so that it is expected that using CaCO3 mud will have little effect on formation damage or at least easily cleaned by acidizing. The aim of this research is to obtain a formula of mud with CaCO3 which at least gives formation damage. Laboratory experiments on this drilling mud using several mud samples adjusted to the property specifications of the mud program. Mud sample consists of 4, namely using super fine, fine, medium, and conventional CaCO3. First measuring mud properties in each sample then testing the filter cake breaker, testing the initial flow rate using 200 ml of distilled water and a 20 micron filter disk inserted in a 500 ml HPHT cell then assembled in a PPA jacket and injecting a pressure of 100 psi. The acidification test was then performed using 15% HCL and then pressured 100 psi for 3 hours to let the acid work to remove the cake attached to the filter disk (acidizing). Laboratory studies are expected which of these samples will minimize the formation damage caused by drilling fluids.</em>

scholarly journals Metodyka kontrolowania związków aminowych i lateksów w płuczkach wiertniczych

Nafta-Gaz ◽  
2021 ◽  
Vol 77 (3) ◽  
pp. 164-174
Author(s):  
Grzegorz Zima ◽  
Keyword(s):  
Chloride Ions ◽  
Drilling Mud ◽  
Measuring Range ◽  
Industrial Practice ◽  
Unit Value ◽  
The Stability ◽  
Amine Compounds ◽  
Drilling Muds ◽  
Mud Filtrate

In industrial practice, rock hydration inhibitors, classified as amine compounds, are being increasingly used in drilling mud compositions. There is no methodology for determining this type of compounds content in the drilling mud, and proper servicing of this type of muds requires constant monitoring of their content to ensure appropriate inhibitory properties. During drilling, amine compounds adsorb on the surface of rocks and their concentration decreases during drilling and reduces the inhibitory properties of the mud. A common additive used in the composition of drilling muds is latex, the determination of which is necessary to ensure the mud parameters stability. Compounds of this type ensure the stability of the borehole wall, while their content also decreases during drilling. The results obtained from the research presented in the article allowed to propose methods for the determination of amine compounds and latexes. These methods can be used in the field laboratory when servicing drilling muds. The article presents the methodology for determining the content of new types of chemicals used in drilling muds, i.e. rock hydration inhibitors classified as amine compounds and latexes. The proposed methods enable proper servicing of muds with the addition of the agents that ensure the maintenance of appropriate mud properties. The method for the determination of amine compounds consists in determining the total nitrogen in the drilling mud filtrate. Dilution of the filtrate provides the results within the measuring range of the method and reduces the concentration of chloride ions, the amount of which may not exceed 10 000 mg/dm3. The first method of latex determination is weight determination of the dry residue after separation of the latex from the filtrate with acetone. The second one is based on nephelometric measurements of a tenfold diluted filtrate. The measurement result is the NTU (nephelometric turbidity unit) value depending on the latex content in the filtrate. All of the developed methods require the preparation of calibration curves, which are the basis for calculating the content of a given agent in the mud.

Influence of Drilling Muds on the Primary Chemosensory Neurons in Walking Legs of the Lobster, Homarus americanus

1981 ◽  
Vol 38 (3) ◽  
pp. 268-274 ◽  
Author(s):  
Charles D. Derby ◽  
Jelle Atema
Keyword(s):  
Feeding Behavior ◽  
Homarus Americanus ◽  
Normal Activity ◽  
Drilling Mud ◽  
Behavioral Deficits ◽  
Chemosensory Neurons ◽  
Petroleum Fractions ◽  
Food Odors ◽  
Normal Feeding ◽  
Drilling Muds

The effects of whole drilling muds on the normal activity of walking leg chemosensory neurons of the lobster, Homarus americanus, were examined using extracellular neurophysiological recording techniques. Exposure of legs for 3–5 min to 10 mg/L drilling mud suspended in seawater altered responses to food odors of 29% of the chemoreceptors examined (data pooled for the two drilling muds tested); similar exposure to 100 mg/L drilling mud resulted in interference with 44% of all receptors studied. The effects of both of these concentrations are statistically significant, although they are not different from each other. Interference was usually manifested as a marked reduction in the number of action potentials in a response. In one preparation, the exposure to drilling mud caused a change in the temporal pattern of the spikes without affecting the total number of spikes. Other chemosensory neurons were excited by 10 mg/L drilling mud itself. However, not all chemoreceptors are inhibited by these drilling muds since responses to feeding stimuli were recorded from the legs of lobsters that had been exposed to drilling mud for 4–8 d before the neurophysiological experiments.Antennular and leg chemoreceptors are important in eliciting normal feeding behavior in lobsters. Although behavioral assays have demonstrated that feeding behavior is altered following exposure to drilling muds and petroleum fractions, there is no conclusive proof for a causal relationship between chemoreceptor interference and behavioral deficits. The two techniques complement each other as pollution detection assays, perhaps reflecting a common interference mechanism.Key words: chemoreception, drilling mud, feeding behavior, lobster, pollution, neurophysiology

scholarly journals Novel Desorber for Online Drilling Mud Gas Logging

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Marcin Lackowski ◽  
Marek Tobiszewski ◽  
Jacek Namieśnik
Keyword(s):  
Gaseous Phase ◽  
Gas Analysis ◽  
Attractive Alternative ◽  
The Novel ◽  
Recovery Efficiency ◽  
Drilling Mud ◽  
Mechanical Mixing ◽  
Analytical System ◽  
Drilling Muds ◽  
Lower Limits

This work presents the construction solution and experimental results of a novel desorber for online drilling mud gas logging. The traditional desorbers use mechanical mixing of the liquid to stimulate transfer of hydrocarbons to the gaseous phase that is further analyzed. The presented approach is based on transfer of hydrocarbons from the liquid to the gas bubbles flowing through it and further gas analysis. The desorber was checked for gas logging from four different drilling muds collected from Polish boreholes. The results of optimization studies are also presented in this study. The comparison of the novel desorber with a commercial one reveals strong advantages of the novel one. It is characterized by much better hydrocarbons recovery efficiency and allows reaching lower limits of detection of the whole analytical system. The presented desorber seems to be very attractive alternative over widely used mechanical desorbers.

The Experience of Digital Transformation of Business Processes of Applied Experimental Research by Using the Multitenancy of the Resources

2021 ◽  
Vol 27 (1) ◽  
pp. 41-50
Author(s):  
V. A. Komarov ◽  
◽  
A. V. Sarafanov ◽  
S. R. Tumkovskiy ◽  
◽  
...  
Keyword(s):  
Experimental Research ◽  
Business Processes ◽  
Training System ◽  
Digital Transformation ◽  
Laboratory Research ◽  
High Tech ◽  
Laboratory Equipment ◽  
Experimental Laboratory ◽  
Business Functions ◽  
End To End

As part of the digital transformation of various areas of human activity, the urgent task is to transform existing business processes (BP) in order to increase their variability according to the needs of the customer, to increase productivity, quality and competitiveness of products. The introduction of end-to-end digital technologies allows for this. The article examines the experience of transforming the BP of experimental research in solving a number of applied tasks in the field of electronic instrumentation, which is obtained as a result of the introduction of operation technology for test, research and laboratory equipment based on the concept of multitenancy. Developed on the basis of the experience of the authors, a number of industrial samples and prototype multiuser distributed measurement-control systems implementing this concept have allowed to transform the following processes: end-to-end BP of tests on-board electronic equipment of spacecraft (communications, relay, navigation, geodesy, remote sensing, etc.); BP of forming the operational load of the spacecraft's on-board relay complex; BP of conducting experimental laboratory research in the industry training system. The effectiveness of modernized BP was evaluated on the basis of their formalized models and a set of qualitative indicators. The key resulting effects of transformation: improving the quality of BP by improving the informativeness of individual business functions and the efficiency of the use of high-tech experimental equipment; reducing the number of gaps in BP by reducing the number of business roles involved in their implementation; reducing the duration of BP by significantly reducing material and time costs and improving the productivity of individual business functions; transition to a service model "Laboratory As Service" for access to high-tech equipment while performing experimental laboratory studies based on digital educational environments.

A New Cationic Shale Inhibitor and Water Blocking Agent for Water-Based Drilling Fluid

2021 ◽  
Author(s):  
Mohammed Al-Heed ◽  
Mobeen Murtaza ◽  
Sayed Hussain ◽  
Rahul Gajbhiye
Keyword(s):  
Cationic Surfactant ◽  
Drilling Fluid ◽  
Petroleum Industry ◽  
Blocking Agent ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
Water Penetration ◽  
Water Blocking ◽  
Shale Formation ◽  
Clay Layers

Abstract Drilling a shale formation is one of the challenges faced by the petroleum industry. Designing the drilling fluid, that reduces the interaction with shale, is important for safe and efficient drilling. This study investigates the new cationic surfactant as a shale inhibitor for the drilling fluid. The main objective of this study is to block the water penetration into the clay layers using the new shale inhibitor and evaluate its performance with commercial shale inhibitors. To assess the performance of new cationic surfactant two reliable clay sources were considered. The first source is from unconventional Qusiba (Kaolinite) formation in Saudi Arabia and the second is a commercial Bentonite. The effect of new cationic formulation on preventing clay swelling were tested using API dynamic swelling meter at reservoir condition. Further, X-ray diffraction and SEM analysis were performed to ensure clay stability before exposing it to WBM and after exposure for cation exchange phenomenon, shape and size of the particle and efficacy of water penetration blockage. The results were also compared with commercial shale inhibitor. The results show that the new cationic surfactant can act as a shale inhibitor as well as water blocking agent. It also showed acceptable performance compare with common shale inhibitors used in the industry, the performance can be further improved by optimizing the percentage of surfactant addition to the drilling fluid. This study provides the new cationic surfactant and proved to have good feature for oilfield applications and the cationity which is helping to reduce the water shale interactions.

scholarly journals Temperature Augmented Visual Method for Initial Screening of Hydrate Inhibitors

2018 ◽  
Vol 73 ◽  
pp. 1 ◽  
Author(s):  
Tinku Saikia ◽  
Vikas Mahto
Keyword(s):  
Gas Hydrates ◽  
Induction Time ◽  
Drilling Fluid ◽  
Academic Research ◽  
Petroleum Industry ◽  
Visual Methods ◽  
Drilling Mud ◽  
Initial Screening ◽  
Visual Method ◽  
Augmented Method

The formation of gas hydrates in oil & gas pipelines and drilling fluid flow lines is a major issue in the petroleum industry. Gas hydrate inhibitors are normally used to inhibit the formation of gas hydrates in the pipelines/flowlines. Initial screening of hydrate inhibitors and AntiAgglomerants (AA) requires a safe and economical experimental setup/method. Conventional visual method was used for initial screening of hydrate inhibitors in many researches. Some researchers also suggested modified visual methods, but all of them lacks accurate measurement of induction time and found to be inappropriate for experimental solutions like drilling mud, etc. In this work, a temperature augmented visual method was presented which can be used in academic research laboratories for study and initial screening of hydrate inhibitors. This method is capable of parallel screening of inhibitors and determines hydrate induction time precisely. Experiments were conducted to determine the hydrate induction time of different inhibitors using augmented method and compared with conventional visual method. The developed method found to be more precise in determining the induction time of hydrates in all types of experimental solutions.

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