Latin America Blog

Share your knowledge and learn from others at this multidisciplinary workshop to be held in Lima, Peru on 15-16 October 2015. Presentation proposals are due 30 August 2015. 

American Association of Petroleum Geologists (AAPG)
Learn! Blog

With the recent surge in new techniques and technology, as well as new plays put into production, a tremendous opportunity exists in both U.S. and international reservoirs to apply lessons learned to existing reservoirs in order to economically increase production and recoverable reserves.

American Association of Petroleum Geologists (AAPG)
Latin America Blog

Join us in Buenos Aires, Argentina 11-12 May for Extending Mature Fields' Life Cycles: The Role of New Technologies and Integrated Strategies, a Geosciences Technology Workshop organized in partnership with the Asociación Argentina de Geólogos y Geofísicos (AAGGP).

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

Spectral decomposition of seismic data helps in the analysis of subtle stratigraphic plays and fractured reservoirs. The different methods used for decomposing the seismic data into individual frequency components within the seismic data bandwidth serve to transform the seismic data from the time domain to the frequency domain– and generate the spectral magnitude and phase components at every time-frequency sample.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

The Upper Jurassic Smackover formation in northern Louisiana and surrounding states has been explored and drilled for decades, but has only recently seen the sophisticated approach needed to decipher its challenging geology.

American Association of Petroleum Geologists (AAPG)
Explorer Regions and Sections

The Ayoluengo field, commonly cited as Spain’s only onshore oil field, was discovered in June 1964. Today, 50 years later, the field is still active, with an average production of some 100 barrels oil per day and a total cumulated oil production of nearly 17 million barrels of oil.

American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

May 14, 2014, Marks the 100th anniversary of the initial petroleum discovery at Turner Valley. The field sits at the leading edge of the Foothills Belt of the Rocky Mountains, just to the southwest of Calgary, Canada.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

The Croatian Hydrocarbons Agency used AAPG’s Annual Convention and Exhibition (ACE) in Houston last month as an opportunity to formally announce that the country’s first offshore license round opened April 2 of this year.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

When it comes to U.S. energy policy, there arguably is no topic that creates more heated debate than that of the federal OCS (Outer Continental Shelf) leasing program.

American Association of Petroleum Geologists (AAPG)
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.

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American Association of Petroleum Geologists (AAPG)

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