Explorer Article

Coalbed methane research and development has been a big story for over 20 years with virtually all the focus on the western United States. But what many folks don't know is that small 'mom and pop' shops have been quietly pioneering coalbed methane production in the Arkoma Basin in southeastern Oklahoma.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Despite conventional thought perceiving coalbed methane as an anomaly and that completion techniques were slow an inefficient, pioneering independents worked to develop an important industry segment.

American Association of Petroleum Geologists (AAPG)
Explorer Article

After years of 'wheeling and dealing' international oil companies are finally beginning to sink exploratory wells in the Caspian Sea. Could the 'exploratory well of 1999' meet that prediction? The next two years should prove it.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Excitement grows as international companies jockey for position in the world's hottest play -- West Africa's deep water field.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

About five years ago a leader in horizontal drilling teamed with the U.S. Department of Energy's Energy and Technology Center and GRI in a $10 million research project. Their goal: Evaluate the technological and economic feasibility of drilling horizontal wells in fractured, but very-low permeability sandstone three miles below the sage brush flats of southwestern Wyoming. Today the team can now point to an unqualified success with the UPR Rock Island 4-H horizontal well.

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

Deep water play in the Gulf of Mexico keeps getting deeper and hotter. A look at some discoveries in 5-6,000 feet of water shows how they may propel the industry into the Gulf.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Exploration in the deep water Gulf of Mexico may be even better than the success of drilling on the Gulf shelf. The deep offshore Gulf has more remaining, recoverable resources than the shoreward provinces. Recent discoveries seem sure to increase resource projections for the Gulf.

American Association of Petroleum Geologists (AAPG)
Explorer Article

A new exploration strategy for a tough play may make life much more profitable for Rocky Mountain explorationists -- as well as hunters throughout the world.

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 ...