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It outlines the regional context and organizes exploration focus by stratigraphic units, including Permian Lyons Sandstone, Cretaceous “D” and Muddy (“J”) Sandstones, Niobrara, Pierre Shale, and fractured Pierre Shale. The chapter also addresses conventional versus unconventional reservoirs, Wattenberg Field, and coal-bed methane, followed by conclusions and reference materials.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/template/","Template",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/template/presentations/","Presentations",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/template/petroleum-systems-and-assessment-of-undiscovered-oil-and-gas-in-the-denver-basin-province-chapter-2-oil-and-gas-exploration-and-development-along-the-front-range/563457/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/petroleum-systems-and-assessment-of-undiscovered-oil-and-gas-in-the-denver-basin-province-chapter-2-oil-and-gas-exploration-and-development-along-the-front-range/563457.png","ImageObject",442,249,{"name":42,"@type":43},"Aurelia","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-19","2026-10-12",true,{"@type":52,"interactionType":53,"userInteractionCount":22},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What region does Chapter 2 focus on for oil and gas exploration?","Question",{"text":62,"@type":63},"It focuses on the Front Range within the Denver Basin, spanning Colorado, Nebraska, and Wyoming.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"Which stratigraphic units are covered in the chapter’s exploration overview?",{"text":67,"@type":63},"The chapter covers units including Permian Lyons Sandstone; Cretaceous “D” and Muddy (“J”) Sandstones; Niobrara Formation and Codell Sandstone Member; Pierre Shale sandstones; fractured Cretaceous Pierre Shale (Florence Field); and coal-bed methane from Denver and Laramie Formations.",{"name":69,"@type":60,"acceptedAnswer":70},"How does the chapter distinguish reservoir types?",{"text":71,"@type":63},"It differentiates conventional reservoirs from unconventional reservoirs, including discussion tied to the Wattenberg Field.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},563457,1792403768,{"code":4,"msg":81,"data":82},"success",[83,87,92,97,102,107,112,117,122],{"id":84,"doc_module":22,"doc_module_name":25,"category_name":29,"show_sort_weight":85,"slug":86},11,90,"presentations",{"id":88,"doc_module":22,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},12,"Resumes",80,"resumes",{"id":93,"doc_module":22,"doc_module_name":25,"category_name":94,"show_sort_weight":95,"slug":96},14,"Invoices",70,"invoices",{"id":98,"doc_module":22,"doc_module_name":25,"category_name":99,"show_sort_weight":100,"slug":101},15,"Posters",60,"posters",{"id":103,"doc_module":22,"doc_module_name":25,"category_name":104,"show_sort_weight":105,"slug":106},16,"Social Media",50,"social-media",{"id":108,"doc_module":22,"doc_module_name":25,"category_name":109,"show_sort_weight":110,"slug":111},17,"Forms",40,"forms",{"id":113,"doc_module":22,"doc_module_name":25,"category_name":114,"show_sort_weight":115,"slug":116},18,"Letters",30,"letters",{"id":118,"doc_module":22,"doc_module_name":25,"category_name":119,"show_sort_weight":120,"slug":121},21,"Paper Templates",5,"papers-templates",{"id":123,"doc_module":22,"doc_module_name":25,"category_name":124,"show_sort_weight":4,"slug":125},158,"General","general-158",{"code":4,"msg":81,"data":127},{"doc_id":78,"user_id":128,"nickname":42,"user_avatar":129,"doc_module":22,"category_id":84,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":22,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":135,"language":136,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":12,"update_tm":140,"read_time":103},1099514068365,"https://ap-avatar.wpscdn.com/avatar/10000253d8d9f28188e?_k=1776742907772140068","Chapter 2  \nOil and Gas Exploration and Development along the Front Range in the Denver Basin of Colorado, Nebraska, and Wyoming  \nBy Debra K. Higley and Dave O. Cox  \nChapter 2 of  \nPetroleum Systems and Assessment of Undiscovered Oil and Gas in the Denver Basin Province, Colorado, Kansas, Nebraska, South Dakota, and Wyoming—USGS Province 39  \nCompiled by Debra K. Higley  \nU. S. Geological Survey Digital Data Series DDS–69–P  \nU. S. Department of the Interior  \nU. S. Geological Survey  \nU.S. Department of the Interior  \nDIRK KEMPTHORNE, Secretary  \nU.S. Geological Survey  \nMark D. Myers, Director  \nU. S. Geological Survey, Reston, Virginia: 2007  \nFor product and ordering information:  \nWorld Wide Web: [http://www.usgs.gov/pubprod](http://www.usgs.gov/pubprod)  \n[Telephone: 1](Telephone: 1)–[888](888)–[ASK](ASK)–[USGS](USGS)  \nFor more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment:  \nWorld Wide Web: [http://www.usgs.gov](http://www.usgs.gov)  \n[Telephone:1](Telephone:1)–[888](888)–[ASK](ASK)–[USGS](USGS)  \nAny use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U. S. Government.  \nAlthough this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report.  \nSuggested citation:  \nHigley, D. K. , Cox, D. O. , 2007, Oil and gas exploration and development along the front range in the Denver Basin of Colorado, Nebraska, and Wyoming, in Higley, D. K. , compiler, Petroleum systems and assessment of undiscovered oil and gas in the Denver Basin Province, Colorado, Kansas, Nebraska, South Dakota, and Wyoming—USGS Province 39: U. S. Geological Survey Digital Data Series DDS–69–P, ch. 2, 41 p.  \nGraphics by the author.  \nISBN 1-411-31943-1  \nContents  \nAbstract ........................................................................................................................................................ 1  \nIntroduction ................................................................................................................................................. 1  \nOil and Gas Exploration in the Front Range Area .................................................................................. 4  \nPermian Lyons Sandstone ................................................................................................................ 5  \nCretaceous “D” and Muddy (“J”) Sandstones............................................................................. 8  \nConventional Reservoirs.......................................................................................................... 8  \nUnconventional Reservoirs (Wattenberg Field) ................................................................... 12  \nUpper Cretaceous Niobrara Formation and Codell Sandstone Member of the Carlile Shale ........................................................................................................................................ 15  \nUpper Cretaceous Pierre Shale Sandstones ................................................................................ 17  \nFractured Cretaceous Pierre Shale (Florence Field) ................................................................... 31  \nCoal-Bed Methane from Denver and (or) Laramie Formations.................................................. 32  \nConclusions ................................................................................................................................................. 34  \nSelected References.................................................................................................................................. 35  \nGlossary of Terms ....................................................................................................................................... 40  \nFigures  \n1. Map showing t","cbCaipCkmLRAvnVN","https://ap.wps.com/l/cbCaipCkmLRAvnVN","pdf",4486782,45,"English","# Contents\n## Abstract\n## Introduction\n## Oil and Gas Exploration in the Front Range Area\n## Permian Lyons Sandstone\n## Cretaceous “D” and Muddy (“J”) Sandstones\n## Conclusions\n## Selected References\n## Glossary of Terms\n# Figures\n## Figure 1\n## Figure 2\n## Figure 3\n## Figure 4\n## Figure 5\n## Figure 6\n## Figure 7\n## Figure 8\n## Figure 9\n## Figure 10\n## Figure 11","[{\"question\":\"What region does Chapter 2 focus on for oil and gas exploration?\",\"answer\":\"It focuses on the Front Range within the Denver Basin, spanning Colorado, Nebraska, and Wyoming.\"},{\"question\":\"Which stratigraphic units are covered in the chapter’s exploration overview?\",\"answer\":\"The chapter covers units including Permian Lyons Sandstone; Cretaceous “D” and Muddy (“J”) Sandstones; Niobrara Formation and Codell Sandstone Member; Pierre Shale sandstones; fractured Cretaceous Pierre Shale (Florence Field); and coal-bed methane from Denver and Laramie Formations.\"},{\"question\":\"How does the chapter distinguish reservoir types?\",\"answer\":\"It differentiates conventional reservoirs from unconventional reservoirs, including discussion tied to the Wattenberg Field.\"}]","Petroleum Systems and Assessment of Undiscovered Oil and Gas in the Denver Basin Province - Chapter 2 - Oil and Gas Exploration and Development along the Front Range | PDF",1791835694]