Wellbore Servicing Fluid Particulate Blend for Permeable Zone Loss Control
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Solution Overview
Problem
Wellbore servicing fluids face challenges with fluid loss and permeable zones, leading to undesired water and gas production, sand production, scale, and corrosion, which affect the economic life of hydrocarbon-producing wells and complicate wellbore servicing operations.
Innovation Solution
A wellbore servicing fluid (WSF) comprising a particulate blend of type A and type B particulate materials, where type A has a weight average particle size of equal to or greater than W/3 microns and type B less than W/3 microns, is used to minimize fluid loss and withstand increased pressures, with the particulate blend being added to the WSF in amounts ranging from 3 wt.% to 25 wt.%, along with water and optional cementitious materials, gelling agents, and additives to enhance rheological properties and fluid loss control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional wellbore servicing fluids are used in permeable zones, then fluid loss control is insufficient, but using fluid loss control additives increases fluid viscosity and may reduce flow rate
Solution Approach 1:
The patent applies parameter changes by carefully controlling the concentration of fluid loss control additives within the range of 0.01-10 wt%, and adjusting particle size distributions (type A: 0.1-2.0 mm, type B: 0.01-0.1 mm) to optimize both fluid loss control and flow characteristics. This balanced parameter selection resolves the contradiction between reducing fluid loss and maintaining adequate flow rate.
Solution Approach 2:
The patent uses a composite material system combining multiple components: fluid loss control additives, suspended particulate matter with bimodal size distribution, and crosslinking agents. This composite approach provides effective fluid loss control while maintaining rheological properties that ensure sufficient flow rate through the wellbore.
2Loss of substance
If fluid loss control additives are added to wellbore servicing fluid, then fluid loss is reduced, but the complexity of fluid composition increases
Solution Approach 1:
The patent achieves multi-functionality by selecting fluid loss control additives that simultaneously provide fluid loss control, rheological modification, and suspension stabilization. This universal approach reduces the need for multiple separate additives, thereby controlling composition complexity while effectively reducing fluid loss.
Solution Approach 2:
The patent controls the concentration of fluid loss control additives within a specific range (0.01-10 wt%) to achieve effective fluid loss control without excessive complexity. By optimizing this parameter, the patent balances performance improvement with compositional simplicity.
3Reliability
If crosslinking agents are used to enhance fluid gel strength, then sealing integrity improves, but fluid viscosity increases which may hinder circulation
Solution Approach 1:
The patent applies preliminary action by using crosslinking agents that activate under specific downhole conditions (temperature, pressure, pH) after the fluid has already been circulated into position. This timing allows the fluid to maintain low viscosity during circulation, then develop high gel strength at the target location to ensure sealing integrity.
Solution Approach 2:
The patent selects crosslinking agents and conditions that provide controlled gelation, where the fluid transitions from a low-viscosity state during circulation to a high-gel-strength state at the target zone. This parameter control resolves the contradiction between circulation speed and sealing integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The WSF effectively reduces fluid loss, prevents circulation losses, and maintains sealing integrity in permeable zones, allowing for efficient wellbore operations and extended well life by minimizing fluid influx and outflux, thereby enhancing the effectiveness of wellbore servicing fluids.
Implementation Method 1
the particulate blend being added to the WSF in amounts ranging from 3 wt.% to 25 wt.%, wherein the particulate blend comprises a type A particulate material and a type B particulate material
Data Source
AI summary
A method of servicing a wellbore penetrating a subterranean formation, comprising placing a wellbore servicing fluid (WSF) into the wellbore proximate a permeable zone having an average fracture width of about W microns, wherein the WSF comprises a particulate blend and water, and wherein the particulate blend comprises (a) a type A particulate material characterized by a weight average particle size of equal to or greater than about W/3 microns, and (b) a type B particulate material characterized by a weight average particle size of less than about W/3 microns, wherein a weight ratio of the type A particulate material to the type B particulate material is from about 0.05 to about 5.