The below profile lists the top 10 companies by onshore well count. It details liability by operator as an absolute value and as a percentage of all operators. It also lists an absolute value of inactive wells and that as a percentage of inactive wells of all operators. Data was sourced from Enverus. Data is updated through September 2020.

Operator Company Name

Count of Onshore Wells

Liability ($)

Liability (%) 

Inactive* Well Count

Inactive* Wells (%)

CHEVRON

53,620

5,968,780,727

2

6,210

1

OCCIDENTAL PETROLEUM

46,022

6,954,528,352

2

7,325

1

EXXON MOBIL

41,050

7,767,289,617

3

6,206

1

DIVERSIFIED PRODUCTION

27,538

2,164,640,639

1

3,074

0

HILCORP ENERGY

27,141

4,772,457,312

2

4,381

0

AERA ENERGY LLC

24,072

1,205,980,697

0

3,050

0

CONOCOPHILLIPS

18,838

2,596,522,415

1

946

0

CALIFORNIA RESOURCES     PRODUCTION

17,812

2,247,651,980

1

6,281

1

APACHE

16,951

2,579,066,969

1

3,261

0

EOG RESOURCES

16,531

3,735,653,537

1

1,871

0

*”Inactive” wells are those wells defined as “TA” or “Zombie” in Carbon Tracker’s nomenclature and are based on data obtained from Enverus

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