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Fractured Carbonate Reservoirs

Explorer Article

The golden oldie: Operators’ eyes tend to light up when talking about the Permian Basin, with good reason – the venerable play is not only still going strong, it keeps providing exciting new chapters to its history.

American Association of Petroleum Geologists (AAPG)
Explorer Article

A new hydrocarbon play in Kansas and Oklahoma is drawing interest to possibilities in several Mississippian formations.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Sweet sound of success: The spotlight turns to oil in the Bakken shale, and the focus was squarely on the sweet spots.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Oil and gas finders are enamored with the Williston Basin these days, looking for the next big find in the upper Devonian-Lower Mississippian Bakken formation.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

A combination of experience and conviction has contributed to the successful career of AAPG Explorer of the Year Michael Johnson.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Deep in the heart of Texas . . . there are a lot of new approaches and strategies that are being applied in a lot of older areas, providing a fresh appearance to a familiar face.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Don't feel bad if you haven't grasped the uses and benefits of geophysical tools in unconventional plays -- you're not alone. But here's something you need to know.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Dick Findley has two pieces of advice for working petroleum geologists. You’ll want to pay attention. Findley opened up a Bakken formation play that led to development of the giant Elm Coulee oil field in eastern Montana. The field now produces almost 50,000 barrels a day of high-quality crude.

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

This year marks the second consecutive year for AAPG to participate as a major partner in oil and gas conferences and exhibitions in the Arabian Gulf Region.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

The emergence of 3-D ground penetrating radar technology has the potential to drastically alter the traditional approach to fieldwork.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 19 May 2011, 12:00 a.m.–12:00 a.m.

This e-symposium presents and discusses the results of laboratory tests and research relating to determining shale prospectivity in general, and specifically in the Black Warrior Basin, Alabama.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 28 April 2011, 12:00 a.m.–12:00 a.m.

The Niobrara Petroleum System of the U.S. Rocky Mountain Region is a major tight petroleum resource play.

American Association of Petroleum Geologists (AAPG)
Online Certificate Course
Tuesday, 1 January 2013, 12:00 a.m.–1:00 a.m.

There are approximately 1,000 oil and gas fields in the world that have been classified as 'giant,' containing more than 500 million barrels of recoverable oil and /or 3 trillion cubic feet of gas.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 24 October 2013, 12:00 a.m.–12:00 a.m.

This e-symposium will be introducing signal processing techniques as a means to maximize extracting geomechanical data from petrophysical logs.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 29 September 2011, 12:00 a.m.–12:00 a.m.

This study will focus in the combination of λρ – μρ inversion with clustering analysis techniques in order to discriminate brittle zones in the Barnett Shale.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 26 September 2013, 12:00 a.m.–12:00 a.m.

The presentation will discuss key reservoir information and how to develop a predictive pressure model.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 3 June 2010, 12:00 a.m.–12:00 a.m.

Upon successful completion of this course, you will be able to describe faults and fractures in carbonates, black shales, and coarser clastics as they occur in the northern Appalachian Basin.

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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