Company lists · Data refreshed September 2026

Top 25 Petroleum consulting firms worldwide

Name: Petroleum consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 7,454 companies tracked

RevenueBase identified 7,454 company matches for petroleum consulting firms worldwide as of September 2026 and tracks 300,409 professional contacts across them, including 67,793 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for petroleum consulting firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026. Country and city lists for petroleum consulting firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built

7,454Companies

300,409Contacts tracked

67,793Verified emails

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The 25 largest petroleum consulting firms worldwide

Ranked by team size

Top 25 of 7,454 company matches for petroleum consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Halliburton	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	10001+	53,380 contacts →
	Exact match “We collaborate and engineer solutions to maximize asset value for our customers.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	NOV	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	10001+	29,577 contacts →
	Exact match “NOV delivers technology-driven solutions to empower the global energy industry.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	WOOD	Exact match	Aberdeen, United KingdomHQ recorded Sep 29, 2026	10001+	26,949 contacts →
	Exact match “Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Aker Solutions	Exact match	Fornebu, NorwayHQ recorded Sep 29, 2026	10001+	15,774 contacts →
	Exact match “Aker Solutions is a global engineering and technology company known for delivering complex energy projects with trusted quality and predictable results.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 29, 2026	1,001-5,000	3,932 contacts →
	Exact match “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Ortec Group	Exact match	Aix-en-provence, FranceHQ recorded Sep 29, 2026	10001+	3,436 contacts →
	Exact match “En conjuguant depuis sa création audace et rigueur, le groupe Ortec est devenu aujourd’hui un des leaders des services à l’industrie, l’énergie et l’environnement.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,755 contacts →
	Exact match “Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	SRK Consulting	Exact match	Vancouver, CanadaHQ recorded Sep 29, 2026	1,001-5,000	2,259 contacts →
	Exact match “SRK Consulting is an independent, international group providing specialised consultancy services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Sinopec International Petroleum Service Corporation	Exact match	北京市, ChinaHQ recorded Sep 29, 2026	10001+	1,952 contacts →
	Exact match “Sinopec International Petroleum Service Corporation SSC” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Aarvi Encon	Exact match	Mumbai, IndiaHQ recorded Sep 29, 2026	5,001-10,000	1,890 contacts →
	Exact match “Aarvi Encon has established it's leadership in providing Engineering Consultancy and Technical Assistance to Oil & Gas, Refinery, Petrochemical, Pipelines, Power & Infrastructure…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	TGS	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,775 contacts →
	Exact match “TGS provides advanced data and intelligence to companies active in the energy sector.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Geolog International	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 29, 2026	1,001-5,000	1,685 contacts →
	Exact match “Every year, drilling teams make decisions worth millions of dollars on incomplete information.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Pt. Surveyor Indonesia	Exact match	IndonesiaHQ recorded Sep 29, 2026	1,001-5,000	1,537 contacts →
	Exact match “Surveyor Indonesia was incepted on 1 August 1991.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Core Laboratories	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,500 contacts →
	Exact match “With over 70 offices in more than 50 countries located in major oil-producing provinces, Core Laboratories provides services to the world's major, national, and independent oil…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	RENCO	Exact match	Pesaro, ItalyHQ recorded Sep 29, 2026	1,001-5,000	1,494 contacts →
	Exact match “Renco S.p.A, an Italian company founded in 1979, is continually committed to providing its Clients with sound business solutions in an ever increasingly complex and challenging…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	ANTON	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 29, 2026	5,001-10,000	1,407 contacts →
	Exact match “Anton Oilfield Services Group (hereinafter as “Anton”) is the world's leading integrated oilfield technology service company that provides clients with a full range of products…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Forum Energy Technologies	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,262 contacts →
	Exact match “FET (Forum Energy Technologies, Inc.) is a global company, serving the crude oil, natural gas, and renewable energy industries.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Abraj Energy Services	Exact match	Muscat, OmanHQ recorded Sep 29, 2026	1,001-5,000	1,244 contacts →
	Exact match “Abraj Energy Services ("Abraj"), was founded in May 2006 and has taken major strides.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Knight Piesold	Exact match	Denver, CO, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,231 contacts →
	Exact match “Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	PT Pertamina Drilling Services Indonesia	Exact match	South Jakarta, IndonesiaHQ recorded Sep 29, 2026	1,001-5,000	1,200 contacts →
	Exact match “PT Pertamina Drilling Services Indonesia (Pertamina Drilling) was established on June 13th, 2008.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,088 contacts →
	Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Queiroz Galvão Óleo E GÁS S.A	Exact match	BrazilHQ recorded Sep 29, 2026	1,001-5,000	1,069 contacts →
	Exact match “A Queiroz Galvão Óleo e Gás (QGOG) é a maior companhia privada de prestação de serviços de perfuração e produção do Brasil.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Gulf Companies	Exact match	Houston, TX, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,046 contacts →
	Exact match “At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Sertecpet	Exact match	Quito - El Coca, EcuadorHQ recorded Sep 29, 2026	1,001-5,000	1,021 contacts →
	Exact match “SERTECPET® is a multinational company specialized in providing worldwide Integrated Energy Solutions with state-of-the-art technology.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Capital Limited	Exact match	Mauritius, AustriaHQ recorded Sep 29, 2026	1,001-5,000	994 contacts →
	Exact match “Capital Limited is a leading service provider for the exploration and mining industry.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “petroleum consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 7,454 petroleum consulting firms worldwide

See the full list, filter by size, metro and specialty, and access 67,793 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Petroleum consulting firms worldwide at a glance

As of Sep 29, 2026

22.6%Verified-email coverage

40.3Average contacts per company

11-50Median size (employees)

5.1%Largest-city concentration · Houston

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

3,671

11-50

2,272

51-200

998

201-500

258

501-1,000

101

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for petroleum consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “petroleum consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 67,793 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Petroleum consulting firms by location

46 lists · largest first

Every Petroleum consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “petroleum consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many petroleum consulting firms are there worldwide?

RevenueBase identified 7,454 company matches for petroleum consulting firms worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Halliburton tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most petroleum consulting firms?

The United States leads with 1,479 companies, followed by the United Kingdom (485) and Canada (407). Every petroleum consulting firms list by country and city is linked on this page.

Which city has the most petroleum consulting firms?

Houston leads with 379 company records, followed by Calgary (219) and London (144).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 67,793 professional contacts with verified work emails tracked across these 7,454 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.