scholarly journals A semi-analytical approach to model drilling fluid leakage into fractured formation

2021 ◽  
Author(s):  
Rami Albattat ◽  
Hussein Hoteit
Keyword(s):  
Solution Method ◽  
Drilling Fluid ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Fracture Conductivity ◽  
Type Curves ◽  
Cumulative Volume ◽  
Proposed Model ◽  
Hydraulic Aperture ◽  
Subsurface Formation

AbstractLoss of circulation while drilling is a challenging problem that may interrupt operations and contaminate the subsurface formation. Analytical modeling of fluid flow in fractures is a tool that can be quickly deployed to assess drilling mud leakage into fractures. A new semi-analytical solution is developed to model the flow of non-Newtonian drilling fluid in fractured formation. The model is applicable for various fluid types exhibiting yield-power law (Herschel-Bulkley). We use finite-element simulations to verify our solutions. We also generate type curves and compare them to others in the literature. We then demonstrate the applicability of the proposed model for two field cases encountering lost circulations. To address the subsurface uncertainty, we combine the semi-analytical solutions with Monte Carlo and generate probabilistic predictions. The solution method can estimate the range of fracture conductivity, parametrized by the fracture hydraulic aperture, and time-dependent fluid loss rate that can predict the cumulative volume of lost fluid.

scholarly journals Modeling Lost-Circulation into Fractured Formation in Rock Drilling Operations

2021 ◽  
Author(s):  
Rami Albattat ◽  
Hussein Hoteit
Keyword(s):  
Analytical Modeling ◽  
Drilling Fluid ◽  
Fluid Loss ◽  
Fracture Conductivity ◽  
Type Curves ◽  
Bingham Plastic ◽  
Lost Circulation ◽  
Rock Formations ◽  
Solution Methods ◽  
Drilling Operations

Loss of circulation while drilling is a challenging problem that may interrupt drilling operations, reduce efficiency, and increases cost. When a drilled borehole intercepts conductive faults or fractures, lost circulation manifests as a partial or total escape of drilling, workover, or cementing fluids into the surrounding rock formations. Studying drilling fluid loss into a fractured system has been investigated using laboratory experiments, analytical modeling, and numerical simulations. Analytical modeling of fluid flow is a tool that can be quickly deployed to assess lost circulation and perform diagnostics, including leakage rate decline and fracture conductivity. In this chapter, various analytical methods developed to model the flow of non-Newtonian drilling fluid in a fractured medium are discussed. The solution methods are applicable for yield-power-law, including shear-thinning, shear-thickening, and Bingham plastic fluids. Numerical solutions of the Cauchy equation are used to verify the analytical solutions. Type-curves are also described using dimensionless groups. The solution methods are used to estimate the range of fracture conductivity and time-dependent fluid loss rate, and the ultimate total volume of lost fluid. The applicability of the proposed models is demonstrated for several field cases encountering lost circulations.

scholarly journals Experimental analysis of drilling fluid prepared by mixing iron (III) oxide nanoparticles with a KCl–Glycol–PHPA polymer-based mud used in drilling operation

2020 ◽  
Vol 10 (8) ◽  
pp. 3389-3397 ◽  
Author(s):  
Nayem Ahmed ◽  
Md. Saiful Alam ◽  
M. A. Salam
Keyword(s):  
Filter Cake ◽  
Drilling Fluid ◽  
Gel Strength ◽  
Filter Press ◽  
Plastic Viscosity ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Drilling Operation ◽  
Critical Issues ◽  
Mud Loss

Abstract Loss of drilling fluid commonly known as mud loss is considered as one of the critical issues during the drilling operation as it can cause severe formation damage. To minimize fluid loss, researchers introduced numerous additives but did not get the expected result. Recently, the use of nanoparticles (NPs) in drilling fluid gives a new hope to control the fluid loss. A basic KCl–Glycol–PHPA polymer-based mud is made, and six different concentrations of 0.1, 0.5, 1.0, 1.5, 2.0, 3.0 wt% iron (III) oxide or Hematite (Fe2O3) NPs are mixed with the basic mud. The experimental observations reveal that fluid loss of basic mud is 5.9 ml after 30 min and prepared nano-based drilling mud results in a less fluid loss at all concentrations. Nanoparticles with a concentration of 0.5 wt% result in a 5.1 ml fluid loss at the API LTLP filter press test. On the other hand, nanoparticles with a concentration of 3.0 wt% enhance the plastic viscosity, yield point, and 10 s gel strength by 15.0, 3.0, and 12.5%, respectively. The optimum concentration of hematite NPs is found to be 0.5 wt% which reduces the API LPLT filtrate volume and filter cake thickness by 13.6 and 40%, respectively, as well as an improvement of plastic viscosity by 10%.

scholarly journals Influence of Graphene Nanoplatelet and Silver Nanoparticle on the Rheological Properties of WaterBased Mud †

2018 ◽  
Vol 8 (8) ◽  
pp. 1386 ◽  
Author(s):  
Hazlina Husin ◽  
Khaled Abdalla Elraies ◽  
Hyoung Jin Choi ◽  
Zachary Aman
Keyword(s):  
Rheological Properties ◽  
Silver Nanoparticle ◽  
Drilling Fluid ◽  
Oil Field ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Fluid System ◽  
Graphene Nanoplatelet ◽  
Environmental Friendly ◽  
Water Based

Water-based mud is known as an environmental-friendly drilling fluid system. The formulation of water-based mud is designed to have specific rheological properties under specific oil field conditions. In this study, graphene nanoplatelet and silver nanoparticle (nanosilver) were added to a water-based mud formulation in which they act as drilling mud additives. Rheological properties measurements and filtration tests were conducted for evaluating the influence of the added nanoparticles. The results showed that the graphene nanoplatelet and the nanosilver increased the plastic viscosity (PV) by up to 89.2% and 64.2%, respectively. Meanwhile, both the yield point (YP) and the fluid loss values were reduced. In addition, we believe this is the first result ever report where nanosilver is utilized for enhancing-enhanced water-based mud’s performance.

Modified Corn Starch as an Environmentally Friendly Rheology Enhancer and Fluid Loss Reducer for Water-Based Drilling Mud

SPE Journal ◽  
2022 ◽  
pp. 1-17
Author(s):  
Emanuel Ricky ◽  
Musa Mpelwa ◽  
Chao Wang ◽  
Bahati Hamad ◽  
Xingguang Xu
Keyword(s):  
Rheological Properties ◽  
High Temperatures ◽  
Corn Starch ◽  
Drilling Fluid ◽  
Environmentally Friendly ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Oh Groups ◽  
Filtration Loss ◽  
Water Based

Summary Drilling fluid rheology and fluid loss property are fundamental parameters that dictate the effectiveness and easiness of a drilling operation. Maintaining these parameters under high temperatures is technically challenging and has been an exciting research area for the drilling industry. Nonetheless, the use of drilling mud additives, particularly synthetic polymers, threaten ecological environments. Herein, modified corn starch (MCS) was synthesized, characterized, and investigated as an environmentally friendly rheology enhancer and filtration loss controlling agent for water-based mud (WBM) at high temperatures. The experimental results indicated that MCS exhibits better performance in improving rheological properties and fluid loss controlling ability for WBM than the commonly used mud additives. With the addition of an optimal concentration (0.3 wt%), MCS improved the rheology and fluid loss behavior of WBM formulation at harsh aging temperature (220°C) by practically 4 times and 1.7 times, respectively. The MCS was revealed to perform superbly over polyanionic cellulose (PAC) addition at all investigated temperatures. The better performance of the MCS was ascribed to the improved entanglements in the mud system owing to the additional hydroxyl (OH) groups. Besides, the Herschel-Bulkley model was found to be a constitutive model that described the rheological properties of the investigated muds satisfactorily. Moreover, the MCS was found to exhibit acceptable biodegradability properties.

Utilization of Nano and Micro Particles to Enhance Drilling Mud Rheology

2020 ◽  
Vol 1002 ◽  
pp. 435-447
Author(s):  
Lina Jassim ◽  
Robiah Yunus ◽  
Umer Rashid
Keyword(s):  
Oil And Gas ◽  
Drilling Fluid ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Gas Drilling ◽  
Micro Particles ◽  
Deep Wells ◽  
Mud Cake ◽  
The Stability ◽  
Harsh Conditions

Nanoparticles have been used to overcome the limitations of drilling oil and gas wellbores under harsh conditions of high pressure and high temperature (HPHT). In the present work, calcium carbonate (CaCO3: 5 µm particles), graphene (powder and platelets) and carbon nano sphere nanoparticles were used as rheology enhancer and fluid loss agent for HTHP drilling fluid technology. The results revealed that by adding only 0.1 wt% of nanoparticles to ester-based drilling mud improved the stability for drilling deep and ultra-deep wells up to 230°C. Furthermore, adding graphene powder gave more effective results comparing to graphene platelets and carbon nano sphere. The mud can plug 10 µm of formation size with 8 ml of filtration and 775 mD of permeability using (21/2 × 1/4 ) inch of ceramic disc. The nanoparticle enhanced ester-based drilling fluid also showed superior rheology, fluid loss amount and mud cake thickness. The application of nano ester based drilling fluid is in oil and gas drilling industry.

scholarly journals Experimental investigation of fluid loss and cake thickness control ability of zirconium (IV) oxide (Z_R O_2) nanoparticles in water based drilling mud.

2018 ◽  
Vol 7 (2) ◽  
pp. 702 ◽  
Author(s):  
Anawe A. L. Paul ◽  
Folayan J. Adewale
Keyword(s):  
Drilling Fluid ◽  
Fluid Loss ◽  
Effective Diameter ◽  
Oil Well ◽  
Drilling Mud ◽  
Filtration Problem ◽  
Fluid Filtration ◽  
Well Drilling ◽  
Cake Thickness ◽  
Water Based

A major technical and economical concern of the oil well drilling industry is the potential damage to productive formations because of excessive drilling fluid filtration and its multiplier effect on cake thickness. High fluid loss (high cake permeability) results in thick filter cake which reduces the effective diameter of the hole (tight holes) and causes various problems such as excessive torque when rotating the pipe, excessive drag when pulling it and high swab and surge pressures due to reduced hole diameter and differential pipe sticking due to increase in pipe contact.It is in this light that the potential of Zirconium (IV) oxide (Z_r O_2) nanoparticles in combating excessive filtration problem in Water Based Mud was investigated. Preliminary results show that addition of 0.50g (Z_r O_2) nanoparticle concentration brought about 19.10% reduction in fluid loss and 14.29 % reduction in cake thickness for the High Temperature/ High Pressure (HPHT) filtration test at 500psi and 250 OF. Similarly, the highest reduction of 48.31% and 38.10% in fluid loss and cake thickness respectively was achieved with addition of an optimum concentration of 2.0g of (Z_r O_2) nanoparticles for the HTHP filtration test at the same temperature and pressure.

scholarly journals Comparative assessment of Mucuna solannie as an alternative fluid loss control material in synthetic drilling fluid design

2020 ◽  
Author(s):  
Kevin C. Igwilo ◽  
N. Uwaezuoke ◽  
Raymond K. Onyekwere ◽  
Vivian C. Amaefule ◽  
Abimbola A. Durogbitan ◽  
...  
Keyword(s):  
Filter Cake ◽  
Drilling Fluid ◽  
Low Cost ◽  
Control Agent ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Synthetic Materials ◽  
Standard Value ◽  
Fluid Design ◽  
Loss Control

AbstractIn recent years, research using biomaterials in drilling fluid design has thrown light on their biodegradability, availability and low cost. Apart from these, they have in some cases shown properties superior to those of synthetic materials. This research assessed Mucuna solannie as a fluid loss control agent, looking at its fluid loss, filter cake quality, rheology and comparing them with those of Sodium Asphalt Sulfonate, a commonly used drilling mud additive. It assessed the additives at varying concentrations of 2 ppb, 4 ppb, 6 ppb and 8 ppb. The results obtained were filtrate volumes of 5.5 against 4.8 at 2 ppb, 5.0 against 4.5 at 4 ppb, 4.5 against 4.2 at 6 ppb, and 4.1 against 3.8 at 8 ppb, all at 30 min. Field standard value is 5.0 ml fluid loss. Filter cake thickness was1mm for all concentrations of Mucuna solannie. On rheology, plastic viscosity, yield point and yield stress were 27cP against 28cP, 19Ib/100ft2 against 19Ib/100ft2, and 5Ib/100ft2 against 6Ib/100ft2, showing slight difference in their rheological properties.

Sequential Prediction of Drilling Fluid Loss Using Support Vector Machine and Decision Tree Methods

2021 ◽  
Author(s):  
Oluwatosin John Rotimi ◽  
David Nnaemeka Ukwu ◽  
Wang Zhenli ◽  
Yao Liang ◽  
Anthony A. Ameloko ◽  
...  
Keyword(s):  
Support Vector Machine ◽  
Decision Tree ◽  
Prediction Models ◽  
Drilling Fluid ◽  
Principal Component ◽  
Support Vector ◽  
Fluid Loss ◽  
Drilling Process ◽  
Drilling Mud ◽  
Lost Circulation

Abstract Machine learning methods have been applied to predict depths of fluid loss in hydrocarbon exploration.During drilling, lost circulation can be described as the unpleasant loss of all or part of drilling mud or fluid into the immediate formations or affected formation by excessive hydrostatic pressure, sufficient to fracture the formation or expand existing fractures encountered during the drilling process. In this study, we deployed Python codes of Support Vector Machine (SVM) and Decision Tree (DT) methodsto categorical data obtained from drilling operations in a producing field to predict lost circulation occurrence. The modelsleveraged the capability of both SVM and DT to achieve binary classification by adopting flow-out percentage of less than 70 percent as the points of lost circulation. That is, < 70% is represented as Loss and > 70% represented asNo Loss. Prediction models were applied to 10 input variables preprocessed with principal component analysis (PCA) to reduce dimensionality and focus on essential variables. The preprocessed SVM model gave an improved result while preprocessing does not affect DT models. Overall, DT models predicted accurate fluid losszones and can be scaled up to field operations with options ofcontinuous sampled variables.

The study of the drilling mud fluid loss reducing agents based on carboxymethyl starch and cellulose

2017 ◽  
pp. 102-105
Author(s):  
R.R. Sagitov ◽  
◽  
K.M. Minaev ◽  
A.S. Zakharov ◽  
A.S. Korolev ◽  
...  
Keyword(s):  
Reducing Agents ◽  
Fluid Loss ◽  
Drilling Mud ◽  
Carboxymethyl Starch
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