American Oil and Gas Reporter - October 2020 - 53

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FIGURE 5
Produced Oil Sample Geochemical Fingerprints Before and After Infill Drilling (Well 3)
1.06

Immediate Post-frac (Jan. 2020)

1.05

Blob 68/67

1.04

nC-19

1.03
Blob 68

Blob 57
Blob 67

Blob 54

1.02

1.01

1.00

Pre-frac (2019)

Post-frac (Feb.-Apr. 2020)
1.06

1.07

1.08

1.09

1.10

1.11

Blob 57/54

completion jobs, the parent wells were
brought back on line and oil samples
were collected within the first month as
presented by the orange markers. There
were noticeable changes in geochemical
signatures in the pre-frac versus immediate
post-frac produced oil samples from both
parent wells, illustrating hits from the
infill well frac treatments.
However, after approximately four
months, the geochemical signatures returned to patterns similar to pre-frac, as
illustrated by the green markers in Figure
5. When corelating with the production

allocation results, the zonal contribution
impact of the frac hit to parent wells 3
and 4 was within 10% during the initial
four months of fracturing the infill wells.
The results of the Midland Basin application demonstrate how high-resolution
geochemical fingerprinting technology
provides quantitative, actionable information
related to reserves, reservoir characterization
and reservoir performance to optimize the
economic development of shale reservoirs.
The workflow also has been applied in
many other major unconventional basins
in both North and South America, including

the Delaware, Eagle Ford, Williston,
Anadarko, Powder River, Denver-Julesburg,
Montney, and Vaca Muerta.
r

DOUGLAS L. HARDMAN is senior
petrophysicist at Diamondback Energy
in Midland. He joined the company in
2019 after several years as an exploration
petrophysicist in the Middle East with
Saudi Aramco and Baker Hughes, in
North Africa with Apache, and in North
America with Petro-Canada and Schlumberger. Hardman holds a bachelor's in
engineering from Lakehead University.

geology from SUNY Brockport and an
M.S. on structural geology from Pennsylvania State University.

JIANG WU is co-founder and vice
president of analytical technology at
RevoChem LLC. He was a post-doctoral
research fellow at the University of Texas
Health Science Center before co-founding
the company. Wu holds a B.S. and an
M.S. in microbiology from Wuhan University, and a Ph.D. in biochemistry
from Indiana University Bloomington.

DAVE CANNON is senior vice president, geoscience and technology, at Diamondback Energy. He joined the company
as a senior geologist in 2014 after serving
in exploration and geology roles at Newfield Exploration, Samson Resources and
ConocoPhillips. Cannon holds a B.S. in

FAYE LIU is founder and chief executive officer of Houston-based RevoChem
LLC, which provides geochemical fingerprinting solutions for field development. She also serves as a professor of
practice at Texas A&M University. Before
founding RevoChem in 2018, she was a
geochemist and geologist at ConocoPhillips. Liu holds a B.S in environmental and civil engineering from Hohai
University, and an M.S. in geochemistry
and a Ph.D. in geological and earth
sciences/geosciences from Indiana University Bloomington.

Editor's Note: For more information
on the workflows and findings of the
Midland Basin project, see URTeC: 2902,
"From Reservoir Characterization to
Reservoir Monitoring: An Integrated
Workflow to Optimize Field Development
Using Geochemical Fingerprinting Technology," a technical paper prepared for
presentation at the 2020 Unconventional
Resources Technology Conference.

MUQING JIN is a data scientist at

RevoChem. He joined the company in
2019 after interning with RevoChem
in 2018. Jin holds a Ph.D. in geophysics and B.S. degrees in physics
from the University of Houston and
the University of Science & Technology
of China.
OCTOBER 2020 53

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