Explorer Historical Highlights

In January 1860, Lawrence, Kan., newspaperman George W. Brown, while visiting his hometown of Conneautville, Pa., was captured in the excitement of a new oil boom radiating from nearby Titusville.

American Association of Petroleum Geologists (AAPG)
Explorer Policy Watch

AAPG provided a glowing introduction to me last month in this column, but now that it is time for my first column:

American Association of Petroleum Geologists (AAPG)
Explorer President’s Column

AAPG members realize that finding oil and gas is at best an arduous, difficult task.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

The North Sea is one place where new approaches to older challenges are constantly sought. The new technique called “frequency blend” applies color to help visualize frequency bands and is working well in the Barents Sea.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Improving conditions: Technological advances in seismic acquisition have led to successful operations in the Gulf of Mexico – and those lessons are being shared around the world.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

A new kid in town: Nodal technology is proving itself a game-changer on data acquisition in the venerable Permian Basin.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Added to the 'first-time-ever” list was the announcing of paper and poster awards at the end of the event.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Monterey Shale oil development will happen – but it could take a decade, according to AAPG member Fred Aminzadeh.

American Association of Petroleum Geologists (AAPG)
Explorer Article

California dreaming: Some people see the Monterey Shale, and think “oil.” Others, however, see a slippery challenge.

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

In an effort to continue serving the geosciences community in the Middle East, AAPG Middle East Region will be offering a number of Geosciences Technology Workshops (GTWs) where the attendees, practitioners and scientists will have an opportunity to discuss real cases, issues and experiences.

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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