STATISTICAL CHARACTERIZATION OF PERFORMANCE OF BIOPOLYMER DRILL-IN FLUID FOR DIFFERENT RHEOLOGICAL MODELS


STATISTICAL CHARACTERIZATION OF PERFORMANCE OF BIOPOLYMER DRILL-IN FLUID FOR DIFFERENT RHEOLOGICAL MODELS

Type: Project Materials | Format: Ms Word | Attribute: Documentation Only | Pages: 50 Pages | Chapters: 1-5 chapters | Price: ₦ 3,000.00

1,938 marked this research material reliable.
Call or whatsapp: +2347063298784 or email: info@allprojectmaterials.com
STATISTICAL CHARACTERIZATION OF PERFORMANCE OF BIOPOLYMER DRILL-IN FLUID FOR DIFFERENT RHEOLOGICAL MODELS

ABSTRACT

Appropriate selection of rheological models is important for hydraulic calculations of pressure loss prediction and hole cleaning efficiency of drilling fluids. Power law, Bingham-Plastic Herschel-Bulkley models are the conventional fluid models used in the oilfield. However, there are other models that have been proposed in literature which are under / or not utilized in the petroleum industry. The primary objective of this study is to recommend a rheological model that best-fits the rheological behaviour of xanthan gum based biopolymer drill-in fluids for hydraulic evaluations. Ten rheological models were evaluated in this study. These rheological models have been posed deterministically. Obviously this is unrealistic so these deterministic models are replaced by statistical models by adding an error (disturbance) term and making suitable assumptions about them. Rheological model parameters were estimated by least-square regression method. Models like Sisko and modified Sisko which are not conventional models in oil industry gave a good fit. Modified Sisko model which is a four parameter rheological model was selected as the best-fit model since it produced the least residual mean square. There is 95% certainty that the true best-fit curve lies within the confidence band of this function of interest.



CHAPTER ONE

INTRODUCTION

1.1    INTRODUCTION

The use of rheological models to approximate the behaviour of non-Newtonian fluids is very paramount in the oil and gas industry especially during drilling, well completion, workover and acidizing. In drilling operations, mathematically designed rheological models are used to describe the viscous forces to develop frictional pressure loss equations. Accurate prediction of pressure losses help in the determination of bit optimization hydraulics, estimation of equivalent circulating density (ECD) and drilling fluid compressibility. The benefits of a more accurate estimation of ECD is adequate hole cleaning efficiency to enhance total drilling rate which in turn reduces total drilling cost. Prevention of circulation loss, maintenance of under-balanced drilling conditions and detection of potential kick are achieved if ECD is rightfully predicted (Bailey and Peden, 2000). Estimated model parameters help to perform other hydraulics calculations.

Power Law and Bingham Plastic models are widely used for hydraulics evaluation. They are assumed for standard API hydraulics calculations. Herschel-Bulkley, Roberston-Stiff and Casson models have been accepted to some extent in the petroleum industry. These models and the corresponding hydraulic calculations do provide a way for fair estimates of hydraulics for conventional wells using simple drilling fluids as asserted by Guo and Hong in 2010. Power Law model predicts shear stress well at low shear rate (in the annulus) and Bingham Plastic model describes the characteristics of drilling fluid at high shear rate (in the drill pipe).

Biopolymer drill-in fluid is a complex fluid formulated with several compositions to desired properties for optimum performance particularly in unconventional wells. It is a water soluble 'rheology engineered' drilling fluid designed to optimize the performance of rotary drilling. It is a complex high molecular weight (MW) polymer with a strong bond between the chains of its molecules which is efficiently used in unconventional wells like onshore and offshore horizontal wells, coiled tubing drilling and slim holes. The elastic structures of biopolymers make them have a higher carrying capacity than the other polymers applied in the petroleum industry during drilling. Due to the complex nature of this type of fluid and its unusual behaviour, it is very prudent to use a more precise rheological model to characterize its behaviour over a full range of shear rate to achieve a proper hydraulics evaluation.

Drill-in fluids are specially designed fluid system for drilling through the reservoir interval of a wellbore. They are basically formulated to drill the reservoir zone successfully, often a long, horizontal drainhole, to minimize damage and optimize the production of the exposed zones and to enhance the well completion needed. It contains additives that can principally control filtration loss and facilitate optimum carrying capacity. Its composition may be brine with right aggregate size (salt crystals or calcium carbonates) and polymers (www.oilfield.slb.com). Brian et. al (1997) asserted that polymers typically used as drill-in fluids are xanthan gum, starch, cellulose and scleroglucans. Hemphill et al. in 1993 proposed that Herschel-Bulkley model which is a three-parameter model is more likely to approximate the non-Newtonian behaviour of polymeric fluids.

This study focuses on ten rheological models proposed in various literatures and come out with a statistical criterion to select the most likely model to predict the rheological characteristics of xanthan gum base biopolymer drill-in fluids.

1.2        PROBLEM DEFINITION

The use of rheological models in the characterization of the behaviour of non-Newtonian fluid aids in the evaluation of drilling fluid hydraulics. The Power Law and / or Bingham Plastic models are more often used in evaluating hydraulics of drilling fluid in the oilfield during drilling operations. These are used because their resultant flow equations are simple and it is also easier to estimate parameters of the models by explicit solutions. However, none of these is able to predict the behaviour of the fluids over the wide ranges of deformation rate during the circulating of drilling fluid system throughout the wellbore. The advent of computers makes it realistic to estimate parameters of more complicated models and thereby deriving expression of pressure drop as function of flow rate. Rig site computers are now readily available making the requirement for simple parameter estimation and easily manipulated flow functions redundant and provide a platform conducive to more rigorous analysis.

STATISTICAL CHARACTERIZATION OF PERFORMANCE OF BIOPOLYMER DRILL-IN FLUID FOR DIFFERENT RHEOLOGICAL MODELS

Additional Information

  • The Project Material is available for download.
  • The Research material is delivered within 15-30 Minutes.
  • The Material is complete from Preliminary Pages to References.
  • Well Researched and Approved for supervision.
  • Click the download button below to get the complete project material.

Frequently Asked Questions

In-order to give you the best service available online, we have compiled frequently asked questions (FAQ) from our clients so as to answer them and make your visit much more interesting.

We are proudly Nigerians, and we are well aware of fraudulent activities that has been ongoing in the internet. To make it well known to our customers, we are geniune and duely registered with the Corporate Affairs Commission of the republic of Nigeria. Remember, Fraudulent sites can NEVER post bank accounts or contact address which contains personal information. Free chapter One is always given on the site to prove to you that we have the material. If you are unable to view the free chapter 1 send an email to info@allprojectmaterials.com with the subject head "FREE CHAPTER 1' plus the topic. You will get a free chapter 1 within an hour. You can also check out what our happy clients have to say.


Students are always advised to use our materials as guide. However, if you have a different case study, you may need to consult one of our professional writers to help you with that. Depending on similarity of the organization/industry you may modify if you wish.


We have professional writers in various disciplines. If you have a fresh topic, just click Hire a Writer or click here to fill the form and one of our writers will contact you shortly.


Yes it is a complete research project. We ensure that our client receives complete project materials which includes chapters 1-5, full references, questionnaires/secondary data, etc.


Depending on how fast your request is acknowledged by us, you will get the complete project material withing 15-30 minutes. However, on a very good day you can still get it within 5 minutes!

What Clients Say

Our Researchers are happy, see what they are saying. Share your own experience with the world.
Be polite and honest, as we seek to expand our business and reach more people. Thank you.

A Research proposal for statistical characterization of performance of biopolymer drill-in fluid for different rheological models:
Reviews: A Review on statistical characterization of performance of biopolymer drill-in fluid for different rheological models, statistical, characterization, performance project topics, researchcub.info, project topic, list of project topics, research project topics, journals, books, Academic writer.
The use of rheological models in the characterization of the behaviour of non-Newtonian fluid aids in the evaluation of drilling fluid hydraulics. The Power Law and / or Bingham Plastic models are more often used in evaluating hydraulics of drilling fluid in the oilfield during drilling operations. These are used because their resultant flow equations are simple and it is also easier to estimate parameters of the models by explicit solutions. However, none of these is able to predict the behaviour of the fluids over the wide ranges of deformation rate during the circulating of drilling fluid system throughout the wellbore. The advent of computers makes it realistic to estimate parameters of more complicated models and thereby deriving expression of pressure drop as function of flow rate. Rig site computers are now readily available making the requirement for simple parameter estimation and easily manipulated flow functions redundant and provide a platform conducive to more rigorous analysis... petroleum engineering project topics

STATISTICAL CHARACTERIZATION OF PERFORMANCE OF BIOPOLYMER DRILL-IN FLUID FOR DIFFERENT RHEOLOGICAL MODELS

Project Information

  • CATEGORY : PETROLEUM ENGINEERING
  • TYPE : PROJECT MATERIAL
  • FORMAT : MICROSOFT WORD
  • ATTRIBUTE : Documentation Only
  • PAGES : 50 Pages
  • CHAPTERS : 1 - 5
  • PRICE : ₦ 3,000.00

Share Links

Download Post
Download Post

Search for Project Topics

Project topics in Departments

Do you need a writer for your academic work?