Explorer Geophysical Corner

The challenges of the Mina El Carmen Formation can be overcome by evaluating the application of various interpretation tools and special processes, so that the reservoir sands can be detected and visualized in terms of their geometry, orientation, extension, thickness and position in the stratigraphic column.

American Association of Petroleum Geologists (AAPG)
Learn! Blog

New technology has unconventional enhanced oil recovery  Welcome to an interview with Jeff Miller, Shale IOR. Jeff participated in AAPG’s U-Pitch at URTeC, which promotes and helps commercialize innovations and new technologies.

American Association of Petroleum Geologists (AAPG)
EMD Blog

On September 26, 2018, the U.S. Bureau of Land Management (BLM) issued their Record of Decision (ROD) to approve a 14-mile long “energy corridor” across public lands in Uintah County, Utah to support development of a planned 27,000 acre South Project oil shale mine to be developed by Estonia-based Enefit American Oil. The ROD followed a six-year environmental study and preparation of the Final Environmental Impact Study issued by the BLM following extensive public comment.

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American Association of Petroleum Geologists (AAPG)
Middle East Blog

AAPG, EAGE and the Technical Program Committee for the Shale Gas Evolution Symposium are pleased to invite you to submit a poster abstract for the upcoming event which is being held Under the Patronage of His Excellency Shaikh Mohammed Bin Khalifa Al-Khalifa, Minister of Oil, Kingdom of Bahrain, AAPG.

American Association of Petroleum Geologists (AAPG)
Explorer Division Column EMD

I am pleased to serve as president of the Energy Minerals Division for 2018-19. My main goals for this year are to provide frequent, easily accessible, relevant, high-quality technical content, and to improve our member engagement and communication with the regions, local societies and other geological associations.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Exploration and development drilling along the upper region of the Middle Pennsylvanian Red Fork Sandstone has been going on since 1979 in the western part of the Anadarko basin of Oklahoma. Fangyu Li, a postdoctoral research associate in the College of Engineering at the University of Georgia, said the latest technology in multispectral coherence is developing to a point where scientists can see more of what’s down there and they can see it more clearly.

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American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

If a taint exists on the use of geophysics to evaluate fracturing operations, it is this: ‘T ain’t easy. In fact it’s downright difficult, said Arash Dahi Taleghani, associate professor of petroleum and natural gas engineering in the Department of Energy and Mineral Engineering at Penn State University, whose research areas include studying how natural fractures can affect hydraulic-fracture geometry and using seismic for modeling natural fractures and post-treatment fracture analysis.

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American Association of Petroleum Geologists (AAPG)
Explorer Director’s Corner

All eyes were glued on Vienna last month as OPEC gathered to assess oil market conditions and set production targets for its member countries to ensure adequate supplies, but also to support oil prices.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Geomechanics has emerged as a major aspect of unconventional resource development, as demonstrated by its preeminence within this year’s URTeC program.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

As oilfield tech advances keep pace with Moore’s Law, unconventional resources drive U.S. crude production to record heights.

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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