Company lists · Data refreshed November 2026

Top 25 Petroleum exploration services worldwide

Name: Petroleum exploration services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 6,624 companies tracked

RevenueBase identified 6,624 company matches for petroleum exploration services worldwide as of November 2026 and tracks 398,258 professional contacts across them, including 89,608 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for petroleum exploration services 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 exploration services 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

6,624Companies

398,258Contacts tracked

89,608Verified emails

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The 25 largest petroleum exploration services worldwide

Ranked by team size

Top 25 of 6,624 company matches for petroleum exploration services 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	SLB	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	10001+	82,942 contacts →
	Exact match “SLB is a global technology company that has driven energy innovation for more than a century.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	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
3	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
4	Nabors Industries	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	10001+	6,404 contacts →
	Exact match “Nabors Industries is a leading provider of advanced technology for the energy industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	EOG Resources	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,669 contacts →
	Exact match “EOG Resources, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	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
7	PTTEP	Exact match	Chatuchak, ThailandHQ recorded Nov 6, 2026	1,001-5,000	4,105 contacts →
	Exact match “PTTEP conducts business in petroleum exploration, development, and production.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	NESR	Exact match	Houston, United StatesHQ recorded Nov 6, 2026	5,001-10,000	3,989 contacts →
	Exact match “National Energy Services Reunited Corp.(NESR) was founded in 2017 as one of the largest national oilfield services providers in the MENA and Asia Pacific regions and was the first…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	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
10	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
11	Archer	Exact match	Sandnes, NorwayHQ recorded Nov 6, 2026	5,001-10,000	2,455 contacts →
	Exact match “Archer is a company providing drilling and well services to the global energy industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	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
13	OCYAN	Exact match	Rio De Janeiro, BrazilHQ recorded Nov 6, 2026	1,001-5,000	2,402 contacts →
	Exact match “A OCYAN atua há décadas na prestação de serviços para o setor de óleo e gás upstream, estruturando suas operações em três frentes de atuação.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	SAN Antonio Internacional	Exact match	Comuna 1, ArgentinaHQ recorded Nov 6, 2026	1,001-5,000	2,324 contacts →
	Exact match “Somos la mayor prestadora de servicios de perforación de la Argentina y somos líderes en la prestación de servicios asociados al mantenimiento y optimización de los pozos de…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	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
16	Superior Energy Services	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	2,119 contacts →
	Exact match “For oil & gas exploration and production companies worldwide, Superior Energy Services is an oilfield products and services company with global reach, financial stability and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	EMC Egyptian Maintenance Company	Exact match	New Cairo, EgyptHQ recorded Nov 6, 2026	5,001-10,000	2,027 contacts →
	Exact match “Since its foundation in 1997, EMC has become a well-known maintenance and modification service provider to major oil, gas and petrochemical companies, pipeline and refinery…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	OPET	Exact match	Barbaros, TürkiyeHQ recorded Nov 6, 2026	501-1,000	1,928 contacts →
	Exact match “OPET Petrolcülük A.Ş.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	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
20	Cairn OIL And GAS	Exact match	Gurgaon, IndiaHQ recorded Nov 6, 2026	1,001-5,000	1,901 contacts →
	Exact match “Cairn Oil & Gas, part of Vedanta Limited, is India's largest private oil and gas exploration and production company, contributing more than a quarter of India’s domestic crude oil…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	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
22	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
23	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
24	Dubai Petroleum	Exact match	Dubai, United Arab EmiratesHQ recorded Nov 6, 2026	501-1,000	1,630 contacts →
	Exact match “Dubai Petroleum is responsible for managing Dubai's offshore petroleum assets.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	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

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 exploration services”. 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 6,624 petroleum exploration services worldwide

See the full list, filter by size, metro and specialty, and access 89,608 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Petroleum exploration services worldwide at a glance

As of Nov 6, 2026

22.5%Verified-email coverage

60.1Average contacts per company

11-50Median size (employees)

5.5%Largest-city concentration · Houston

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

2,710

11-50

2,120

51-200

1,008

201-500

346

501-1,000

163

1,001-5,000

156

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 exploration services are linked below.
What qualifies: Company records worldwide whose business descriptions match “petroleum exploration services” 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 89,608 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 exploration services by location

49 lists · largest first

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

How many petroleum exploration services are there worldwide?

RevenueBase identified 6,624 company matches for petroleum exploration services 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?

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

Which country has the most petroleum exploration services?

The United States leads with 1,342 companies, followed by Canada (377) and the United Kingdom (359). Every petroleum exploration services list by country and city is linked on this page.

Which city has the most petroleum exploration services?

Houston leads with 363 company records, followed by Calgary (201) and Tehran (100).

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 89,608 professional contacts with verified work emails tracked across these 6,624 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.