Company lists · Data refreshed November 2026

Top 25 Petroleum geoscience firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 7,281 companies tracked

RevenueBase identified 7,281 company matches for petroleum geoscience firms worldwide as of November 2026 and tracks 258,497 professional contacts across them, including 57,992 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for petroleum geoscience 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 November 6, 2026. Country and city lists for petroleum geoscience 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 Nov 6, 2026 How this list was built

7,281Companies

258,497Contacts tracked

57,992Verified emails

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The 25 largest petroleum geoscience firms worldwide

Ranked by team size

Top 25 of 7,281 company matches for petroleum geoscience firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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, United StatesHQ recorded Nov 6, 2026	10001+	58,281 contacts →
	Exact match “We collaborate and engineer solutions to maximize asset value for our customers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	FUGRO	Exact match	Nootdorp, NetherlandsHQ recorded Nov 6, 2026	10001+	8,737 contacts →
	Exact match “We are the world’s leading Geo-data specialist, collecting and analysing comprehensive information about the Earth and the structures built upon it.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	EXPRO	Exact match	Houston, United StatesHQ recorded Nov 6, 2026	5,001-10,000	6,924 contacts →
	Exact match “Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Perenco	Exact match	Londres, United KingdomHQ recorded Nov 6, 2026	5,001-10,000	5,669 contacts →
	Exact match “Founded over thirty years ago, Perenco is an independent hydrocarbon producer involved in the entire lifecycle of projects, from exploration to decommissioning.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Nov 6, 2026	1,001-5,000	4,263 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 · Nov 6, 2026 · View company records in RevenueBase
6	Petronas Carigali Sdn. BHD	Exact match	Kuala Lumpur, MalaysiaHQ recorded Nov 6, 2026	n/a	3,031 contacts →
	Exact match “PETRONAS CARIGALI SDN.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,991 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 · Nov 6, 2026 · View company records in RevenueBase
8	CGG	Exact match	Massy, FranceHQ recorded Nov 6, 2026	1,001-5,000	2,913 contacts →
	Exact match “Founded in 1931, Viridien (formerly CGG) is an advanced technology, digital and Earth data company that pushes the boundaries of science for a more prosperous and sustainable…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	SRK Consulting	Exact match	Vancouver, CanadaHQ recorded Nov 6, 2026	1,001-5,000	2,428 contacts →
	Exact match “SRK Consulting is an independent, international group providing specialised consultancy services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Oilserv	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 6, 2026	1,001-5,000	2,408 contacts →
	Exact match “OiLSERV is a provider of an expanding range of oilfield services, including well logging, well testing, production enhancement, drilling services, surface production management…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Sinopec International Petroleum Service Corporation	Exact match	北京市, ChinaHQ recorded Nov 6, 2026	10001+	2,249 contacts →
	Exact match “Sinopec International Petroleum Service Corporation SSC” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	TGS	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,926 contacts →
	Exact match “TGS provides advanced data and intelligence to companies active in the energy sector.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	OIL States International	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	5,001-10,000	1,831 contacts →
	Exact match “Oil States International, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Geolog International	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 6, 2026	1,001-5,000	1,792 contacts →
	Exact match “Every year, drilling teams make decisions worth millions of dollars on incomplete information.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	EV	Exact match	Sweet Briar Industrial Estate Norwich, United KingdomHQ recorded Nov 6, 2026	n/a	1,689 contacts →
	Exact match “EV specialise in well diagnosis to provide timely insight to well operators, helping them to understand and resolve their most complex wellbore issues.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Capital Limited	Exact match	Mauritius, AustriaHQ recorded Nov 6, 2026	1,001-5,000	1,681 contacts →
	Exact match “Capital Limited is a leading service provider for the exploration and mining industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Core Laboratories	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,601 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 · Nov 6, 2026 · View company records in RevenueBase
18	ANTON	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 6, 2026	5,001-10,000	1,522 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 · Nov 6, 2026 · View company records in RevenueBase
19	TPIC	Exact match	Gölbaşı, TürkiyeHQ recorded Nov 6, 2026	1,001-5,000	1,451 contacts →
	Exact match “Turkish Petroleum International Company (TPIC) 1988 yılında, uluslararası petrol endüstrisinin tüm değer zincirinde faaliyet göstermek amacıyla, Türkiye Petrolleri Anonim…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Cudd Energy Services	Exact match	The Woodlands, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,359 contacts →
	Exact match “Cudd offers a broad range of technical and specialized oilfield services to companies engaged in the exploration and production of oil and natural gas worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	PT Pertamina Drilling Services Indonesia	Exact match	South Jakarta, IndonesiaHQ recorded Nov 6, 2026	1,001-5,000	1,344 contacts →
	Exact match “PT Pertamina Drilling Services Indonesia (Pertamina Drilling) was established on June 13th, 2008.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Abraj Energy Services	Exact match	Muscat, OmanHQ recorded Nov 6, 2026	1,001-5,000	1,315 contacts →
	Exact match “Abraj Energy Services ("Abraj"), was founded in May 2006 and has taken major strides.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	BGP	Exact match	Hebei, ChinaHQ recorded Nov 6, 2026	10001+	1,238 contacts →
	Exact match “BGP is one of the world's leading geophysical service companies, delivering a wide range of technologies, services and equipment to the oil and gas industry worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Queiroz Galvão Óleo E GÁS S.A	Exact match	BrazilHQ recorded Nov 6, 2026	1,001-5,000	1,217 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 · Nov 6, 2026 · View company records in RevenueBase
25	Shearwater Geoservices	Exact match	Laksevåg, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,073 contacts →
	Exact match “Shearwater is a global marine geoscience and technology business.” Recorded in the RevenueBase company graph · Nov 6, 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 geoscience 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 7,281 petroleum geoscience firms worldwide

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Petroleum geoscience firms worldwide at a glance

As of Nov 6, 2026

22.4%Verified-email coverage

35.5Average contacts per company

1-10Median size (employees)

5.2%Largest-city concentration · Houston

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

3,722

11-50

2,171

51-200

864

201-500

252

501-1,000

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 geoscience firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “petroleum geoscience 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 57,992 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 November 6, 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 geoscience firms by location

47 lists · largest first

Every Petroleum geoscience 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 geoscience firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many petroleum geoscience firms are there worldwide?

RevenueBase identified 7,281 company matches for petroleum geoscience firms worldwide as of November 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 geoscience firms?

The United States leads with 1,404 companies, followed by the United Kingdom (570) and Canada (455). Every petroleum geoscience firms list by country and city is linked on this page.

Which city has the most petroleum geoscience firms?

Houston leads with 382 company records, followed by Calgary (215) and London (113).

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 57,992 professional contacts with verified work emails tracked across these 7,281 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 November 6, 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.