Recent Posts
Bogdan Michka posted Welcome to AAPG N.E.T., an online space where y... to Read This First! in Decision Analysis for G and G Development TIG Discussions
No posts yet.
 

The West Texas (Permian) Basin is a complexly structured intracratonic (IC) basin with prolific oil and natural gas production. It began as a subsidence basin ('Tobosa Basin') from Middle Ordovician to Devonian time, a response to the Cambrian rifting that separated Gondwana and Laurentia. In the Pennsylvanian to early Permian, it formed part of the Ancestral Rocky Mountains (ARM) orogen. The Texas-New Mexico segment of the ARM contains small to medium basement-cored uplifts, folds, thrust faults and two trends of strike-slip faults, with a pattern that is consistent with SW-NE compression. The largest thrust fault known in the basin is SW-vergent, and faces the deepest part of the Delaware Basin. This direction of compression is similar to that observed in the southern Oklahoma part of the ARM, which shows NE-vergent thrusting and left-lateral faulting.

This SW-NE compressive stress is grossly inconsistent with the northwestward convergence of the Ouachita-Marathon thrust belt southeast of the ARM. The ARM-generating stress may have originated either from the Pacific side (by flat subduction) or from strong continental collision in the Appalachian Orogen. Lines of weakness generated during the Proterozoic and/or Cambrian concentrated stress and created the complex structures.

The West Texas branch of the ARM is buried by over 2.5 km of post-deformational Permian strata -- the Permian Basin. Subsidence began during ARM deformation, then increased in rate and continued to the end of the Permian. Permian subsidence resulted in the maintenance of isolated deep-water marine basins until Late Permian time. The Marathon orogen also subsided, and shed little clastic material into the basin. Despite Mesozoic basin-margin modifications, the Permian isopach pattern suggests a bowl-shaped subsidence centered on the Central Basin axis of uplift. The size and shape of the Permian Basin are similar to other IC basins (Illinois, Michigan, Williston). Similar to some IC basins, the central basin area hosts a 1100-Ma mafic complex, which was subjected to compression in Pennsylvanian time. Sinking of a mafic crust or its subjacent lithosphere, begun during compression, may have been a driving force for Permian subsidence.

Over most of the basin, later Permian subsidence was responsible for putting source rocks into the oil window. Further maturation to gas occurred within the deep basins generated by ARM deformation and Marathon thrust loading.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-thomas-ewing-tectonics-and-subsidence-in-the-west-texas-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Tectonics and Subsidence in the West Texas (Permian) Basin, A Model for Complex Intracratonic Basin Development
 

Comparison of the hydrocarbon systems and geometries of the complex intracratonic West Texas (Permian) Basin and the complex postrift subsidence basins of the Gulf Coast / Gulf of Mexico yield useful insights for basin evolution and play development. The West Texas basin contains source rocks in the Ordovician and Devonian, but much generation comes from the Late Mississippian, Pennsylvanian and Permian basinal sediments. These were deposited in a poorly ventilated remnant basin during compression and strike-slip of the Ancestral Rocky Mountains orogeny, and subsidence of the intracratonic Permian Basin. Maturation resulted from Permian intracratonic subsidence, with hydrocarbons sealed from later leakage by late Permian salt and a fortunate tectonic setting. By contrast, the major Jurassic source rocks of the Gulf basins are at the base of the postrift subsidence, and are matured by further subsidence. Later Cretaceous source rocks (Eagle Ford) are mature in the main Gulf basin, but again lie near the bottom of the thick sedimentary package in the area. The younger part of the succession yields mostly gas formed during outbuilding of the shelf margin by Cenozoic deltaic progradation. No cap is present on the basin (except for subsalt plays), and seepage is widespread.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-thomas-ewing-tale-of-two-basins-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true A Tale of Two Basins: Sources and Timing of Petroleum and Natural Gas Generation in the Mature Gulf Coast/Gulf of Mexico and West Texas (Permian) Basins
 

The Yegua Formation (Late Middle Eocene) is a minor siliciclastic progradation of the Gulf of Mexico shelf margin between the larger Early Eocene and Oligocene shelf-margin progradations. During Yegua time (and unlike the other units of the Middle and Late Eocene), four to eight sea-level fluctuations with a 100-300 ka period alternately pushed marine rocks toward the basin margins and pushed deltaic sedimentation to and past the shelf edge. Because of limited to moderate sand supply and the flat coastal plains, the updip (highstand) depositional complexes are nearly entirely separated from the downdip (lowstand) shelf-edge deltas and slope fans. Maximum flooding surfaces can be mapped over much of the area and correlated along and across the basin. The Yegua is truly a laboratory for sequence stratigraphy. A number of plays in the downdip and 'mid-dip' (incised valley complexes) trends have produced over 4 TCF of gas and condensate, and new discoveries await the return of exploration capital. The Yegua story is significant to all those interested in siliciclastic stratigraphy in passive-margin settings.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-thomas-ewing-yegua-formation-late-middle-eocene-in-gulf-coast-basin-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Yegua Formation (Late Middle Eocene) in the Gulf Coast Basin, as a Type Laboratory for Sequence Stratigraphy in Hydrocarbon Exploration
 

One of the most productive regions in the petroleum world for almost a century, the Permian Basin is far from tapped out, according to a new U.S. Geological Survey assessment.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/monumental-wolfcamp-assessment-first-of-many-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Monumental Wolfcamp Assessment First of Many
 

The recent and apparently large oil discoveries on Alaska’s North Slope by Caelus Energy Alaska and Armstrong Oil & Gas, Inc. and its partner Repsol have shown the world that giants may still exist in the 49th state. And, more might be waiting to be found.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/alaskas-north-slope-heats-up-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Alaska’s North Slope Heats Up
 

Attend the AAPG Drone Workshop and Short Course (Nov 30, Dec 1-2 in Houston) and let AAPG launch your new or expanded ventures. Emerge with a project that will help you land contracts and connections.

All attendees will learn how to get started with drone-based mapping, and each attendee will receive his or her own AAPG drone-focused project which can help you build your resume. Use your AAPG project to launch your new line of business and new sources of revenue. We will also discuss marketing your services.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/blog-learn-aapg-and-drones-an-event-that-will-result-in-a-concrete-project-to-help-you-land-contracts-jobs-or-expanded-operations-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Broaden your base with drones. AAPG jump-starts you into new business lines AAPG and Drones: an event that will result in a concrete project to help you land contracts, jobs, or expanded operations
 

Don't get left behind! Drones and drone-derived digital data are the hottest growth areas around. Combine your geoscience knowledge with new technology, both on the data acquisition side (fly that drone!) and in the project design and data interpretation (make high-powered maps and see what no one else has seen!).

AAPG is offering two courses and a two-day GTW to equip you with practical knowledge you can leverage into a great new career opportunity.

Combining a workshop with two courses is a great way to expand your knowledge and save time in your already hectic schedule."The New Opportunities with Drones: New Needs, FAA Rule Changes, New Technologies" workshop brings together experts, equipment providers, robotics experts, and others knowledgeable in a wide range of commercial drone usage, which includes monitoring in the oil industry, digital outcrop surveying, safety and security monitoring, utility inspection, real estate, agriculture, construction, environmental protection, and more.

"Working with Drone Data 101" short course, is beneficial to anyone interested in learning more about Unmanned Aerial Systems (UAS) and how they can play a part in mapping and information services. Drones are used in the oil and gas industry from upstream to downstream, and in many other industries.

The second course, "Use of Surface Geochemistry in Petroleum Exploration" is a one day discussion of the use of surface geochemistry in petroleum exploration for conventional production. This course will help utilize an additional tool in the toolbox to find conventional oil and gas in mature to unexploited basins.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/Drones-and-Surface-Digital-Data-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true AAPG Short Courses and Workshop — All in Houston, TX | November 29-30 and December 1-2, 2016 Drones and Surface Digital Data: 2 Short Courses + a GTW = Expanded Career Opportunities
 
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-arctic-and-marine-gas-hydrate-production-testing-lessons-learnedp-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Arctic and Marine Gas Hydrate Production Testing – Lessons Learned
 
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-gas-hydrate-petroleum-system-analysis-in-marine-and-arctic-permafrost-environments-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Gas Hydrate Petroleum System Analysis in Marine and Arctic Permafrost Environments
 
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-indian-national-gas-hydrate-program-expedition-02-technical-contributions-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Indian National Gas Hydrate Program Expedition 02 Technical Contributions
«« First « Previous |1 2 3 4 ... 10 11 12 13 14 15 16 | Last ››

Online Training
14 December, 2010 14 December, 2010 1467 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-sale-gas-in-quebecs-sedimentary-basins.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
14 December 2010

Recent interest in unconventional gas resources has attracted several oil and gas explorers to sedimentary basins in Southern Quebec.

09 December, 2010 09 December, 2010 1466 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-bakken-petroleum-system-of-the-williston-basin.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
9 December 2010

The Mississippian-Devonian Bakken Petroleum System of the Williston Basin is characterized by low-porosity and permeability reservoirs, organic-rich source rocks, and regional hydrocarbon charge.

19 August, 2010 19 August, 2010 1462 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-challenging-the-paradigm-missing-section-normal-fault.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
19 August 2010

This presentation will show where there are cases of missing sections, but none of them can be attributed to normal faulting.

11 February, 2010 11 February, 2010 1441 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-predicting-gas-hydrates.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
11 February 2010

Gas hydrates, ice-like substances composed of water and gas molecules (methane, ethane, propane, etc.), occur in permafrost areas and in deep water marine environments.

14 February, 3000 14 February, 3000 7817 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-generic-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
Request a Visit
 

Comparison of the hydrocarbon systems and geometries of the complex intracratonic West Texas (Permian) Basin and the complex postrift subsidence basins of the Gulf Coast / Gulf of Mexico yield useful insights for basin evolution and play development. The West Texas basin contains source rocks in the Ordovician and Devonian, but much generation comes from the Late Mississippian, Pennsylvanian and Permian basinal sediments. These were deposited in a poorly ventilated remnant basin during compression and strike-slip of the Ancestral Rocky Mountains orogeny, and subsidence of the intracratonic Permian Basin. Maturation resulted from Permian intracratonic subsidence, with hydrocarbons sealed from later leakage by late Permian salt and a fortunate tectonic setting. By contrast, the major Jurassic source rocks of the Gulf basins are at the base of the postrift subsidence, and are matured by further subsidence. Later Cretaceous source rocks (Eagle Ford) are mature in the main Gulf basin, but again lie near the bottom of the thick sedimentary package in the area. The younger part of the succession yields mostly gas formed during outbuilding of the shelf margin by Cenozoic deltaic progradation. No cap is present on the basin (except for subsalt plays), and seepage is widespread.

Show more

Request a visit from Thomas Ewing!

Desktop /Portals/0/PackFlashItemImages/WebReady/dl-thomas-ewing-tale-of-two-basins-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true

Related Interests

See Also ...