name of presentation · 2012-10-22 · goals for the chemistry tool •validate the water analysis...

OLI Simulation Conference 2012

A Predictive Process for Managing the Disposal of

Produced Water from Systems of Oil and Gas Wells

James Hardy – ChemCorr, LLC Ashwin Dhanasekar, Kenneth Carlson

Department of Civil & Environmental Engineering Colorado State University


A Predictive Process for Managing the Disposal of Produced Water from Systems of Oil and Gas Wells

• Background of the Project • Goals for the Field Management Tool • Goals for the Chemistry Tool • Chemistry in the Chemistry Tool • Examples • Future Work


Background of the Produced Water Project

• Hydraulic Fracturing

• Increased Water Usage

• Produced Water

• Increasing Population & Industry

• Overall Water Balance

• Wattenberg Field


Area of Consideration – Wattenberg Field, CO


The Field Management Tool • Data Collection from Producers

• Analysis

• GIS Implementation

• Water Quality Analysis

• Chemical Calculator Development

• Integration of GIS & Chemistry Tool

• Development of Application


Water Quality Data

Water Quantity

Data

Processing into

Chemistry Calculator

Charge Balance & Equilibrium Calculations

Development of Link –

Chemistry Calculator &

GIS Map

Final GIS Based Application with Custom Tools for Water Quality Analysis

Output Excel File

Co-ordinates

Database File Water Data

Production Data

ArcGIS Geodatabase

Map Service Development

Publish Service

Development of Web

Application

Using Services as

Layers

Developing Web Map

Reconcile pH

Reconcile Alkalinity

Model Composition Softening to

a Set pH

Measured pH

Measured Alkalinity

Predicted Solids, TDS, pH, Alkalinity, Conductivity, Density

Compare to Measured

Solids Removed

Recover Water - RO

Neutralize to a Set pH

Osmotic Pressure

Schematic of the Planned Tool

Reagents Required

Reagents Required

Chemistry Output

Water Recovery & Residue

Chemistry Tool - CalcAq

GIS Tool - ArcGIS


Integrating ArcGIS & CalcAQ • GIS Map will be developed as an interactive application

• Link will be setup between map and Excel

• Excel file will be hosted on the CEWC Web Server

• The Chemistry Tool will be setup on the CEWC Server

• Client will be able to access information through the map

• An Analyst will be able to update with the chemistry tool


Goals for the Chemistry Tool • Validate the Water Analysis

• Critically evaluate and recommend improvements in the Water Analysis

• Predict the properties of the produced water from the analysis

• Predict the results of transport, treatment, and disposal


Water Quality Analysis • Unavailable Water Quality Data

• Sampling – In Progress

• Water Quality Tests

– Mg, Ca, Sr, Ba, Fe, K, Na

– Cl-, SO4=, PO4

-3

– pH, Alkalinity,

– Conductivity, TDS


Processes in a Treatment Plant


Process Scheme for the Chemistry Tool Charge

Balance

Cond

Reagents

Cond

Reagents

Gas

Escapes

Gas

Escapes Settl_GasHCl pH

Adjuster

Disinfect

Reagents

ChgBal

Anal. #

Analysis Recycle_Mix_In Recycle_Out Cond_Out Flocc_Out Settling_Out Sol/Liq Filtrate RO_Perm

Equil_Tk_Out

Source_Rec Cond_Rx_InpH

Adjustment Solid_Set - Until Purge RO_Resid - Until Purge

Base_Adj Settled Solids - Some remain

Alkalinity Filter_Wash RO_Wash

Acid_Adj

Softening Tank RO_Purge Out

Additional Wells/Analyses Filter_Recyc_Out

Produced Water

Chem Conditio

Equil Tank

Reverse Osmosis

Flocculation

Sol/Liq Sepn

Recycle Mix

RO Purge

DisinfectionSettling

Filter Purge


Processing into Chemistry Calculator

Output Excel File

Reconcile pH

Reconcile Alkalinity

Model Composition

Softening - Set pH

Measured pH

Measured Alkalinity

Predicted Solids, TDS, pH, Alkalinity,

Conductivity, Density

Compare to Measured

Solids Removed

Recover Water -

RO

Neutralize - Set pH

Osmotic Pressure

Chemistry Portion of the Tool

Reagents Required

Reagents Required

Chemistry Output

Water Recovery & Residue

Chemistry Tool - CalcAq

Water Quantity Data

Water Quality Data Charge Balance &

Equilibrium Calculations


Chemistry in the Chemistry Tool • Charge Balance

• Alkalinity Adjust (CO2 at present)

• pH Adjustment (NaOH at present, Iterate)

• Molecular Equivalent

• Chemical Conditioning – Set pH • Neutralization and RO – Osmotic P and H2O extraction to solid formation


Examples & Screen Shots

• Flat File – Input

• Summary and Control Screen

• Process Screen (Typical)

• Flat File – Stream Characteristics

• Flat File – Process Results


Flat File – Input


Summary - Control Screen


Process Screen (Typical)


Flat File – Stream Characteristics


Flat File – Process Results


Future Work • Optimized routing for truck traffic & pipelines

• Group wells for centralized treatment

• Improve models for the treatment processes

• Improve Error Handling

• Wizards to solve chemistry problems

• Improve water analysis, including oil carryover


Acknowledgments

• Funding from

– Noble Energy

– Colorado Energy Water Consortium

– Colorado State University

• Hamp Turner - Programming Advice

name of presentation · 2012-10-22 · goals for the chemistry tool •validate the water analysis...

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