High Temperature Wellbore Servicing Fluid Polymer System

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Solution Overview

Problem

Existing wellbore servicing fluids are ineffective at high temperatures due to decreased compatibility and fluid loss control, leading to undesired fluid communication between the wellbore and subterranean formation, which affects hydrocarbon production and causes issues like sand production, scale, and corrosion.

Innovation Solution

A wellbore servicing fluid (WSF) comprising a first polymer formed by polymerizing monomers such as 2-Acrylamido-2-methyl propane sulfonic acid and a second polymer formed by polymerizing monomers like vinylpyrrolidinone, pentaerythritol allyl ether, and methylenebisacrylamide, along with water, is used as a spacer fluid or fluid loss control fluid to maintain compatibility and prevent fluid loss at high temperatures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional spacer fluid is used in high temperature wellbores, then the fluid can be introduced into the wellbore, but the fluid loses compatibility and fluid loss control capability at high temperatures (e.g., 450°F)

Engineering Contradiction:

Improvecompatibility and fluid loss control capabilityVSAvoidwellbore temperature

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The patent modifies the chemical composition parameters of the spacer fluid by incorporating specific polymers (AMPS-acrylamide terpolymer and crosslinked AMPS-vinylpyrrolidinone copolymer) that maintain their functional properties at high temperatures up to 450°F, thereby resolving the contradiction between temperature resistance and fluid performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses a composite fluid system combining multiple polymer types with distinct functions: AMPS-acrylamide terpolymer for fluid loss control, crosslinked AMPS-vinylpyrrolidinone copolymer for thermal stability and compatibility, and optional AMPS-hydroxypropyl methacrylate copolymer for enhanced performance. This composite approach enables the fluid to maintain compatibility and control capabilities at high temperatures

Inventive Principle:

Principle #40Composite materials

2Productivity

If wellbore servicing fluid is circulated in high temperature zones, then the service can be provided, but undesired fluid communication occurs between the wellbore and subterranean formation

Engineering Contradiction:

Improvewellbore service effectivenessVSAvoidfluid communication and fluid loss

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent adjusts the rheological and chemical parameters of the servicing fluid by using temperature-stable polymers that maintain their viscosity and fluid loss control properties at high temperatures, preventing harmful fluid communication while preserving service effectiveness

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention applies different polymer components with specialized functions to address specific problems: AMPS-acrylamide terpolymer for fluid loss control in formation zones, crosslinked AMPS-vinylpyrrolidinone copolymer for thermal stability in high temperature zones, creating a fluid with locally optimized properties for different wellbore conditions

Inventive Principle:

Principle #3Local quality

3Ease of operation

If conventional fluid is used to separate drilling fluid and cementitious fluid, then the spacer function can be performed, but the fluid properties change at high temperatures affecting yield point and plastic viscosity

Engineering Contradiction:

Improvespacer fluid functionalityVSAvoidfluid rheology stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent selects polymers with inherent thermal stability that maintain their rheological parameters (yield point and plastic viscosity) across a wide temperature range up to 450°F, ensuring consistent spacer fluid functionality without property degradation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention combines polymers with complementary properties: AMPS-acrylamide terpolymer for rheological control, crosslinked AMPS-vinylpyrrolidinone copolymer for thermal stability, creating a composite fluid system where each component compensates for the others' limitations at high temperatures

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS10988676B1Methods of making and using a high temperature wellbore servicing fluid

Publication Date: 2021.04.27 HALLIBURTON ENERGY SERVICES INC

AI summary

A method of servicing a wellbore penetrating a subterranean formation, comprising: placing a wellbore servicing fluid (WSF) into the wellbore, wherein the WSF comprises a first polymer, a second polymer, and water, wherein the first polymer is formed by polymerizing monomers comprising three of 2-Acrylamido-2-methyl propane sulfonic acid (AMPS), N,N-dimethylacrylamide (NNDMA), acrylamide, N-vinylacetamide, allyloxy-2-hydroxy propane sulfonic acid (AHPS), acrylic acid (AA), 2-acrylamido-2-tert.-butyl sulfonic acid (ATBS), or N,N-Dimethylaniline, and the second polymer is formed by polymerizing monomers and/or crosslinkers comprising AMPS, vinylpyrrolidinone, pentaerythritol allyl ether, and methylenebisacrylamide, wherein in the vinylpyrrolidinone, the 2-Pyrrolidone group can be substituted by a heterocyclic group, comprising one or more Z membered rings with Y heteroatoms, wherein Z is equal to or greater than three, and wherein Y is equal to or greater than one.