GRAND ISLE BLOCK 18 Field Activity and Well Summary

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Total wells

347
GRAND ISLE BLOCK 18 field

Drill activity

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drill dates not in our copy of this source

The GRAND ISLE BLOCK 18 oil & gas field in Louisiana contains 347 wells on file.

Top operators: FREEPORT SULPHUR CO., EXXON CORPORATION, and others.

Most recent well: SL 20581, operated by TALOS ERT LLC — last updated September 2025.

GRAND ISLE BLOCK 18 field coverage

Parishes the GRAND ISLE BLOCK 18 field intersects.

Calcasieu ParishUnion ParishTangipahoa ParishCaldwell ParishTensas ParishJackson ParishGrant ParishLincoln ParishJefferson Davis ParishLafayette ParishVermilion ParishEast Carroll ParishEast Feliciana ParishSt. Bernard ParishIberville ParishRichland ParishSt. Martin ParishClaiborne ParishEvangeline ParishSt. Landry ParishPointe Coupee ParishLaSalle ParishWebster ParishSt. James ParishPLAQUEMINES — 3 wellsMorehouse ParishRapides ParishAvoyelles ParishWinn ParishVernon ParishCatahoula ParishAssumption ParishDe Soto ParishCaddo ParishRed River ParishWashington ParishSabine ParishJEFFERSON — 344 wellsSt. Tammany ParishCameron ParishEast Baton Rouge ParishIberia ParishNatchitoches ParishTerrebonne ParishBienville ParishBossier ParishAllen ParishOuachita ParishSt. John the Baptist ParishSt. Helena ParishWest Feliciana ParishSt. Mary ParishLafourche ParishWest Carroll ParishConcordia ParishLivingston ParishWest Baton Rouge ParishMadison ParishOrleans ParishAscension ParishAcadia ParishSt. Charles ParishBeauregard ParishFranklin Parish
< 33+3+344+344+

Recent wells

Well Name Parish Last activity Updates Operator API
SL 20581 JEFFERSON 2025-09-01 TALOS ERT LLC 17717202170000
SL 20581 JEFFERSON 2025-09-01 TALOS ERT LLC 17717202150000
SL 797 JEFFERSON 2021-09-02 ENERGY XXI GOM, LLC 17717202070000
SL 797 JEFFERSON 2016-11-25 ENERGY XXI GOM, LLC 17717202080000
SL 20581 JEFFERSON 2014-08-20 ENERGY RESOURCE TECHNOLOGY GOM, LLC 17717202550000
SL 20581 JEFFERSON 2014-02-10 TALOS ERT LLC 17717202150000
SL 797 JEFFERSON 2013-09-13 ENERGY XXI GOM, LLC 17717201920000
SL 797 JEFFERSON 2011-08-24 ATP OIL & GAS CORPORATION 17717202270000
3900 RA SUA;SL 797 JEFFERSON 2011-08-24 ATP OIL & GAS CORPORATION 17717202270000
SL 797 JEFFERSON 2011-08-13 ATP OIL & GAS CORPORATION 17717202410000

Top Operators in the GRAND ISLE BLOCK 18 field by total wells

FREEPORT SULPHUR CO.158EXXON CORPORATION96HUMBLE OIL AND REFINING CO.52ATP OIL & GAS CORPORATION12ENERGY XXI GOM, LLC5ZILKHA ENERGY COMPANY5TALOS ERT LLC4SONAT EXPLORATION GOM INC4MILLENNIUM OFFSHORE GROUP, INC2LINDER OIL CO. A PARTNERSHIP2

Operators: Freeport Sulphur Co., Exxon Corporation, Humble Oil And Refining Co., Atp Oil & Gas Corporation, Energy Xxi Gom, Llc, Zilkha Energy Company, Talos Ert Llc, Sonat Exploration Gom Inc, Millennium Offshore Group, Inc, Linder Oil Co. A Partnership.

Parishes Intersected by the GRAND ISLE BLOCK 18 field

JEFFERSON344PLAQUEMINES3
JEFFERSON
PLAQUEMINES

Other Major Fields in Louisiana most active by total wells

Compare the GRAND ISLE BLOCK 18 field against the other busiest oil and gas fields in Louisiana: