Explorer Article

Who knows? It’s a safe bet that carbon sequestration has a big future, but how that’s going to occur remains a gamble.

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

AAPG’s Energy Minerals Division (EMD) will sponsor a plethora of activities at this year’s International Conference and Exhibition, Oct. 26-29 in Cape Town.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Success stories may abound, but a lot of innovative thought already has been required for the complex Woodford Shale play in Oklahoma’s Arkoma Basin.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

A story to be shared: U.S. geologists may know all about the Fayetteville Shale, but the innovations that have helped bring success there are getting a global spotlight.

American Association of Petroleum Geologists (AAPG)
Explorer Article

A team effort: A special research consortium has been formed to better understand the geology and potential of the Bakken Shale.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Officer candidates for the 2009-10 term have been announced by the AAPG Executive Committee.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Second verse, same as the first: Headlines earlier this year proclaimed the Marcellus Shale as the year's most surprising play. Today the surprise is gone – but the play is getting hotter still.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

A brand new day: Louisiana's new Haynesville Shale play is being touted as the harbinger of what may open an untapped region to prolific gas production.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

What makes the Woodford shale play work? Hundreds of wells are about to be drilled to determine if the play is a bust or the next Barnett.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

In case you missed the news, shale plays are hot right now – and a quick look at U.S. shale activity trends is a revealing, dramatic story.

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 ...