Explorer Article

Following many years of on again/off again activity, the Tuscaloosa Marine Shale (TMS) was, at long last, being proven in recent months to be a viable commercial play, but the market has done a 180-degree spin owing to the unanticipated, near-devastating drop in oil prices.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Oil prices ... barreling downward. Natural gas prices ... up in flames. Gasoline prices ... tanking. The year got off to a scary start for the oil and gas industry

American Association of Petroleum Geologists (AAPG)
Explorer Article

The call for abstracts deadline is Jan. 15 for the next AAPG International Conference and Exhibition – a meeting that will be historic on many levels. This year’s ICE will be held Sept. 13-16 in Melbourne, Australia – the first time AAPG has used that city as a setting for ICE.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Typically when runners are on their marks, they know the course ahead of them. However, as industry players anxiously wait for Mexico to open its hydrocarbon-rich fields to foreign investors, the shortest course to the pay zone is not so clear.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

In international exploration, the new normal is starting to look like the old normal. And 2014 looked a lot like the year before.

American Association of Petroleum Geologists (AAPG)
Explorer Article

For anyone looking to learn from the best oil finders in the business and to interact with successful explorers as they share accounts of their greatest discoveries, that opportunity is at hand. Get ready for this year’s editions of the Division of Professional Affairs (DPA) Playmaker Forums.

American Association of Petroleum Geologists (AAPG)
Explorer Article

It is perhaps the most ironic move in the industry in years. On Nov. 4, citizens in Denton – a city on the edge of the Barnett Shale in north Texas with a population of 123,000 – voted to ban hydraulic fracturing.

American Association of Petroleum Geologists (AAPG)
Learn! Blog

Designed to expose geoscientists to the language and methodologies commonly employed by reservoir engineers to estimate oil and gas reserves, this course will include a brief review of reservoir rock properties, introduction to fluid properties, reservoir drive mechanisms, and commonly used techniques for estimating reserves including analogy, volumetric analysis, material balance, decline curve analysis, and computer simulation.

American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

The relatively recent, very large discoveries offshore Brazil have put pre-salt exploration in the South Atlantic back in the foreground. Pre-salt exploration history, however, is far more ancient and marked with some major successes – but also many failures. Here’s a brief overview of this exploration in West Africa until the M’Boundi discovery, which will be described in detail as it brings some lessons that readers can discover for themselves.

Show more
American Association of Petroleum Geologists (AAPG)
Explorer Article

The call for abstracts has been issued for the next Unconventional Resources Technology Conference, which will be held July 20-22 in San Antonio.

American Association of Petroleum Geologists (AAPG)
VG Abstract

Production from unconventional petroleum reservoirs includes petroleum from shale, coal, tight-sand and oil-sand. These reservoirs contain enormous quantities of oil and natural gas but pose a technology challenge to both geoscientists and engineers to produce economically on a commercial scale. These reservoirs store large volumes and are widely distributed at different stratigraphic levels and basin types, offering long-term potential for energy supply. Most of these reservoirs are low permeability and porosity that need enhancement with hydraulic fracture stimulation to maximize fluid drainage. Production from these reservoirs is increasing with continued advancement in geological characterization techniques and technology for well drilling, logging, and completion with drainage enhancement. Currently, Australia, Argentina, Canada, Egypt, USA, and Venezuela are producing natural gas from low permeability reservoirs: tight-sand, shale, and coal (CBM). Canada, Russia, USA, and Venezuela are producing heavy oil from oilsand. USA is leading the development of techniques for exploring, and technology for exploiting unconventional gas resources, which can help to develop potential gas-bearing shales of Thailand. The main focus is on source-reservoir-seal shale petroleum plays. In these tight rocks petroleum resides in the micro-pores as well as adsorbed on and in the organics. Shale has very low matrix permeability (nano-darcies) and has highly layered formations with differences in vertical and horizontal properties, vertically non-homogeneous and horizontally anisotropic with complicate natural fractures. Understanding the rocks is critical in selecting fluid drainage enhancement mechanisms; rock properties such as where shale is clay or silica rich, clay types and maturation , kerogen type and maturation, permeability, porosity, and saturation. Most of these plays require horizontal development with large numbers of wells that require an understanding of formation structure, setting and reservoir character and its lateral extension. The quality of shale-gas resources depend on thickness of net pay (>100 m), adequate porosity (>2%), high reservoir pressure (ideally overpressure), high thermal maturity (>1.5% Ro), high organic richness (>2% TOC), low in clay (<50%), high in brittle minerals (quartz, carbonates, feldspars), and favourable in-situ stress. During the past decade, unconventional shale and tight-sand gas plays have become an important supply of natural gas in the US, and now in shale oil as well. As a consequence, interest to assess and explore these plays is rapidly spreading worldwide. The high production potential of shale petroleum resources has contributed to a comparably favourable outlook for increased future petroleum supplies globally. Application of 2D and 3D seismic for defining reservoirs and micro seismic for monitoring fracturing, measuring rock properties downhole (borehole imaging) and in laboratory (mineralogy, porosity, permeability), horizontal drilling (downhole GPS), and hydraulic fracture stimulation (cross-linked gel, slick-water, nitrogen or nitrogen foam) is key in improving production from these huge resources with low productivity factors.

Show more

Request a visit from Ameed Ghori!

American Association of Petroleum Geologists (AAPG)

Related Interests

See Also ...