Nano-Proppants for Fracture Conductivity Improvement and Fluid Loss Reduction

2015 ◽  
Author(s):  
Charles C Bose ◽  
Awais Gul ◽  
Brian Fairchild ◽  
Teddy Jones ◽  
Reza Barati
Keyword(s):  
Fluid Loss ◽  
Loss Reduction ◽  
Fracture Conductivity

Formation Damage and Fluid Loss Reduction due to Plastering Effect of Casing Drilling

2011 ◽  
Author(s):  
Moji Karimi ◽  
Ali Ghalambor ◽  
Monty Montgomery ◽  
Timothy Eric Moellendick
Keyword(s):  
Formation Damage ◽  
Fluid Loss ◽  
Loss Reduction ◽  
Casing Drilling

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.

Effect of proppant deformation and embedment on fracture conductivity after fracturing fluid loss

2019 ◽  
Vol 71 ◽  
pp. 102986 ◽  
Author(s):  
Jiaxiang Xu ◽  
Yunhong Ding ◽  
Lifeng Yang ◽  
Zhe Liu ◽  
Rui Gao ◽  
...  
Keyword(s):  
Fluid Loss ◽  
Fracturing Fluid ◽  
Fracture Conductivity

Numerical Analysis of Particulate Flow Applied to Fluid Loss Control in Fractured Channels

2016 ◽  
Author(s):  
Marcos Vinicius Barbosa ◽  
Fernando C. De Lai ◽  
Silvio L. M. Junqueira
Keyword(s):  
Reynolds Number ◽  
Fluid Dynamic ◽  
Particulate Flow ◽  
Vertical Position ◽  
Fluid Loss ◽  
Fluid Viscosity ◽  
Loss Reduction ◽  
Filling Process ◽  
Filling Time ◽  
Time Required

The aim of this work is to numerically investigate the particulate flow applied to filling fractures in wellbores during the drilling operation. In order to do so, the drill hole is considered in the vertical position and the fracture is defined transversal to the borehole. The wellbore is assumed to be impermeable throughout its entire length, except for the fluid inlet, outlet and the fracture point. The fracture is impermeable so that the fluid loss occurs only at its end. The analysis procedure is divided into two parts: the first one regards to the fluid loss due to the presence of a fracture in a channel (which is treated as a single-phase flow). This is a necessary step to correctly determine the boundary condition at the end of fracture by associating the amount of fluid to be lost according to a specific pressure. In the second part, the fracture filling process with the fluid-solid flow is accomplished as some of the particles carried along the channel flow take the fluid path being eventually lost through the fracture. The fracture filling process is finished when the fluid loss reduction achieves a steady plateau, despite the complete fracture obturation provided by the particles deposition. The particulate flow is numerically modeled via an Eulerian-Lagrangian approach. The Dense Discrete Phase Model (DDPM) deals with the phase coupling; the particle collisions (which happen mainly inside the fracture) are modeled through the Discrete Element Method (DEM). Results are shown in terms of both the historic of the fluid loss and the channel inlet pressure. The influence of geometric (fracture length), particle injection (diameter, concentration and density) and flow parameters (Reynolds number and fluid dynamic viscosity) over the length, height and position of the particle bed formed along the fracture as well the filling time is investigated. A better understanding of the fracture filling process is provided since all sensitivity parameters can alter not only the geometric characteristics of the bed and the steady state fluid loss, but also the time required to finish the process. The Reynolds number increases with the particles bed initial position and due to the higher flow velocity the bed length is increased as well. However, the bed height is reduced and the time required to partially obturate the fracture is raised. For safety issues in the operation during the filling process the increase of Re has shown a smaller pressure buildup in the system. To improve the fluid loss reduction at the end of the filling process, a decrease of Re and an increase of fluid viscosity is required. Such reduction is more dramatic when the diameter and the density of the particles are decreased.

Application of nanoproppants for fracture conductivity improvement by reducing fluid loss and packing of micro-fractures

2015 ◽  
Vol 27 ◽  
pp. 424-431 ◽  
Author(s):  
Charles C. Bose ◽  
Brian Fairchild ◽  
Teddy Jones ◽  
Awais Gul ◽  
Reza Barati Ghahfarokhi
Keyword(s):  
Fluid Loss ◽  
Fracture Conductivity

scholarly journals Polymer-FLR for Mud Fluid Loss Reduction

2018 ◽  
Vol 12 (1) ◽  
pp. 79-85
Author(s):  
Robert Dery Nagre ◽  
◽  
Lin Zhao ◽  
Isaac Kwesi Frimpong ◽  
◽  
...  
Keyword(s):  
Fluid Loss ◽  
Loss Reduction

Polyelectrolyte Multilayered Nanoparticles as Nanocontainers for Enzyme Breakers During Hydraulic Fracturing Process

2021 ◽  
Author(s):  
Mubarak Muhammad Alhajeri ◽  
Jenn-Tai Liang ◽  
Reza Barati Ghahfarokhi
Keyword(s):  
Controlled Release ◽  
Filter Cake ◽  
Entrapment Efficiency ◽  
High Loading ◽  
Fluid Loss ◽  
Colloidal Structure ◽  
Fracturing Fluid ◽  
Fracture Conductivity ◽  
Polyelectrolyte Solution ◽  
Static Conditions

Abstract In this study, Layer-by-Layer (LbL) assembled polyelectrolyte multilayered nanoparticles were developed as a technique for targeted and controlled release of enzyme breakers. Polyelectrolyte multilayers (PEMs) were assembled by means of alternate electrostatic adsorption of polyanions and polycations using colloidal structure of polyelectrolyte complexes (PECs) as LbL building blocks. High enzyme concentrations were introduced into polyethyleneimine (PEI), a positively charged polyelectrolyte solution, to form an electrostatic PECs with dextran sulfate (DS), a negatively charged polyelectrolyte solution. Under the right concentrations and pH conditions, PEMs were assembled by alternating deposition of PEI with DS solutions at the colloidal structure of PEI-DS complexes. Stability and reproducibility of PEMs were tested over time. This work demonstrates the significance of PEMs as a technique for the targeted and controlled release of enzymes based on their high loading capacity, high capsulation efficiency, and extreme control over enzyme concentration. Entrapment efficiency (EE%) of polyelectrolyte multilayered nanoparticles were evaluated using concentration measurement methods as enzyme viscometric assays. Controlled release of enzyme entrapped within PEMs was sustained over longer time periods (> 18 hours) through reduction in viscosity, and elastic modulus of borate-crosslinked hydroxypropyl guar (HPG). Long-term fracture conductivity tests at 40℃ under closure stresses of 1,000, 2,000, and 4,000 psi revealed high fracture clean-up efficiency for fracturing fluid mixed with enzyme-loaded PEMs nanoparticles. The retained fracture conductivity improvement from 25% to 60% indicates the impact of controlled distribution of nanoparticles in the filter cake and along the entire fracture face as opposed to the randomly dispersed unentrapped enzyme. Retained fracture conductivity was found to be 34% for fluid systems containing conventional enzyme-loaded PECs. Additionally, enzyme-loaded PEMs demonstrated enhanced nanoparticle distribution, high loading and entrapment efficiency, and sustained release of the enzyme. This allows for the addition of higher enzyme concentrations without compromising the fluid properties during a treatment, thereby effectively degrading the concentrated residual gel to a greater extent. Fluid loss properties of polyelectrolyte multilayered nanoparticles were also studied under static conditions using a high-pressure fluid loss cell. A borate-crosslinked HPG mixed with nanoparticles was filtered against core plugs with similar permeabilities. The addition of multilayered nanoparticles into the fracturing fluid was observed to significantly improve the fluid- loss prevention effect. The spurt-loss coefficient values were also determined to cause lower filtrate volume than those with crosslinked base solutions. The PEI-DS complex bridging effects revealed a denser, colored filter cake indicating a relatively homogenous dispersion and properly sized particles in the filter cake.

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.

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