EORI Low Salinity Research Program - PowerPoint PPT Presentation

1 / 21
About This Presentation
Title:

EORI Low Salinity Research Program

Description:

EORI Low Salinity Research Program – PowerPoint PPT presentation

Number of Views:30
Avg rating:3.0/5.0
Slides: 22
Provided by: gth7
Category:
Tags: eori | fin | low | program | research | salinity

less

Transcript and Presenter's Notes

Title: EORI Low Salinity Research Program


1
EORI Low Salinity Research Program
Update on Progress July 2008
  • Geoffrey Thyne and Mark Leslie
  • Enhanced Oil Recovery Institute
  • University of Wyoming

2
Outline
  • Low Salinity Theory and Prediction
  • Low Salinity Water Flooding Goals
  • Planned Laboratory Projects

3
Tensleep rock, Minnelusa brine and oil, CBM flood
4
Low Salinity Theory and Prediction
  • The response of crude oil/brine/rock
    combinations to injection of low salinity brine
    can not be predicted. At the present state of
    knowledge laboratory screening prior to field
    testing is essential (Zhang and Morrow 2006).
  • One or more of the proposed mechanisms can be
    verified and used to develop a general model.

5
Low Salinity Water Flooding Goals
  • Evaluate potential for low salinity flooding in
    Wyoming reservoirs.
  • Develop laboratory capability to test individual
    reservoirs and perform related experiments.
  • Form partnerships with producers that have
    favorable potential for field trials.

6
Low Salinity Water Flooding Goals
  • Evaluate potential for low salinity flooding in
    Wyoming reservoirs
  • Review all relevant literature
  • Evaluate past experience in Wyoming
  • Develop screening and scoping tools
  • Develop process-based predictive model

7
Preliminary Project Schedule
8
Preliminary screening for low salinity in Wyoming
based on review of published work
  • Sandstone with low clay content
  • High salinity reservoir water
  • One scenario would be -
  • Use Powder River Basin CBM produced water TDS
    of 1500 ppm
  • Best results with 100X difference in salinity
    (meaning reservoir TDS of 100,000 150,000)

9
Identify potential candidate reservoirs/fields
  • Confine choices to PRB
  • Identify top six producing reservoirs (2007)

10
17 Minnelusa Fields TDS gt 100,000 Cumulative
production gt 1Mbbls
Successful Lab results will trigger contact with
producers
11
Planned Laboratory Projects
  • Systematic set of batch experiments for most
    likely Wyoming fields.
  • Systematic set of core floods for most likely
    Wyoming fields (test specific response and
    provide data for model).

12
Laboratory Setup Schematic
Back-pressure regulator
Pump
Sample Separator
Oil sample
Water sample
Core
Transfer Vessel
13
EORI Mass balance approach measure all influent
and effluent constituents.
  • Measure influent and effluent components and
    study differences.
  • Core (SEM, EXDA, XRD, petro).
  • Crude oil (SARA trace metals).
  • Brine cations (Ca, Mg, Na, K, Fe).
  • Brine anions (Cl, SO4, HCO3).
  • Flow-thru cell pH, specific conductance, TDS.
  • Inorganic tracer (e.g., Br-)
  • Organic tracer (?)

14
Input data to preliminary geochemical model
(Geochemists Workbench).
  • Coreflood data used in model for all reactions
    between oil/rock/water
  • Ion exchange
  • Precipitation-dissolution
  • Partitioning (Kds) of oil and water components
    to rock
  • Transport of brine and oil relative to
    conservative tracer

May modify commercial multiphase flow model if
required
15
Low Salinity Laboratory
  • Perform batch experiments to determine
    partitioning between water-rock-oil system
  • Perform water-only floods to determine effects on
    rock and flow properties caused by change in
    salinity.

16
Secure core samples from potential candidate
reservoirs/fields
17
Secure oil and water samples/analyses- from
potential candidate reservoirs/fields
Oil and water samples from Raven Creek Field, PRB
sample courtesy of Citation OG Corp.
18
Low Salinity Laboratory Protocol
  • Fully characterize the pre-flood reservoir rock -
    mineralogy, porosity and permeability (SEM, XRD,
    thin section, tracer studies, por-perm. CEC, BET).

Casper
Tensleep
Berea
19
Analysis of water from potential candidate
reservoirs/fields and lab experiments
Low Salinity Laboratory Protocol
Effluent Water Samples Extract Effluent Water
with CH2Cl2 to remove organics Cations by
ICP Anions by IC Concentrate CH2Cl2extract and
analyze for organics by GC/MS
  • Original Reservoir Brine and
  • Original Low Salinity Brine
  • Cations by ICP
  • Anions by IC

20
Low Salinity Laboratory Protocol
  • Fully characterize the pre-flood reservoir oil -
    acid/base, GCMS, SARA, metals, (contract with
    WRI)

21
Questions?
Write a Comment
User Comments (0)
About PowerShow.com