Learn! Blog

The forum is sponsored by the DPA in conjunction with two local societies, the Pittsburgh Geological Society (PGS) and the Pittsburgh Association of Petroleum Geologists (PAPG). This one-day event will be preceded with a PAPG monthly dinner meeting on the evening of April 12, 2016; providing an opportunity to come to Pittsburgh the day prior to the forum, network with local geoscientists and enjoy an Appalachian Basin technical talk.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

The main goal for shale resource characterization is usually the identification of sweet spots, which represent the most favorable drilling targets. Such sweet spots can be identified as those pockets in the target formation that exhibit high total organic carbon (TOC) content, as well as high brittleness. As there is no direct way of computing TOC using seismic data, we adopt indirect ways for doing so.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Owing to the U.S. shale boom, interest and activity in unconventional E&P has spread internationally. Perhaps the most unexpected locale for these types of plays is the Kingdom of Saudi Arabia.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Every major producer in the Middle East will be represented at AAPG’s upcoming GEO 2016 conference in Bahrain next month.

American Association of Petroleum Geologists (AAPG)
Explorer Article

“Oil fingerprinting,” as it’s called, is indispensable when there is commingled production from different formations.

American Association of Petroleum Geologists (AAPG)
Latin America Blog

Looking for hassle free, cost-effective ways to keep your employees and your company competitive during the industry downturn? AAPG can provide you with customized in-house courses offered at reasonable rates.

American Association of Petroleum Geologists (AAPG)
Explorer Policy Watch

The long-term projections have changed little in the year since this column last reported on the annual International Energy Agency (IEA) “World Energy Outlook,” but the tone is much different. Last year’s report was concerned about finding the investments to meet demand; now the world has surpluses of oil and gas and a booming renewables industry.  

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

In the interest of continuing my theme of “Spreading the Word” about AAPG’s Division of Professional Affairs, here’s an update on some exciting events organized by DPA members for the spring of 2016. Many of you may be familiar with the Playmaker concept, as we have previously held five very successful events.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Since shale plays began revolutionizing the oil and gas industry, North America has been the dominant continent in making them successful. But a strong contender some 5,000 miles south of the U.S. border is beginning to turn heads.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

While many are working to forecast when the price of oil might reach $80 a barrel again, renowned international strategist and geopolitical analyst Peter Zeihan, the author of “The Accidental Superpower,” predicts in stunning detail the rising and declining energy plays of 2025 and the countries that will ultimately triumph as the world’s leading producers.

American Association of Petroleum Geologists (AAPG)
Short Course
Sunday, 25 September 2022, 8:30 a.m.–9:30 a.m.

Date: 25 September 2022 Time: 8:30am - 4:30pm Course Instructor: Alberto Ortiz, Net Zero Carbon Solutions Registration Fee: $530 Registration Deadline: 25 August 2022 Short Course registration is included as part of the GTW registration process. The petrophysical characterization of unconventional shale-type reservoirs has been one of the most approached and relevant issues in the oil and gas industry in the last 8 years. This is because after several years, the operating companies comprehended the impact that an appropriate characterization of the reservoir has on their project economics. Another reason for this were the technical obstacles encountered in the measurement of petrophysical properties such as porosity, saturation and permeability due to the complexity of this type of reservoir. Obstacles and limitations not only relate to laboratory measurements but also to electrical logging tools. As a consequence of this, nowadays, petrophysical evaluations in this type of reservoir do not have standardized workflows established and accepted worldwide as is the case for conventional reservoirs. This motivates the professionals involved in the study of this type of rocks to dedicate a lot of effort in the validation of the technologies used, and sometimes it is difficult for them to understand the results, the evaluation of uncertainties and the construction of petrophysical models with results and representative parameters of the subsurface conditions. This course will focus on providing key knowledge for a better characterization of the rock both in the aspects related to the matrix represented by mineralogy and kerogen as well as the fluids present. The approach will be based on the convergence of different technologies that support and give robustness to the results. The contents that will be provided will include laboratory testing techniques and petrophysical evaluation of electrical well logs for unconventional shale-type reservoirs. The contents provided will cover a variety of studies based on the most diverse physical principles that will include the latest advances and techniques used in the industry such as Nuclear Magnetic Resonance, Spectroscopy, Dielectric, Computed axial tomography and SEM images, among others. As a result of this, attendees will have tools that allow a more comprehensive understanding of this type of rocks, a better assessment of the uncertainty of the model used and the necessary steps to improve its precision, accelerating the learning curve. The contents provided will also allow knowing the critical parameters that must be taken into account for the definition of areas to be drilled. Course Topics Reservoir heterogeneity characterization from outcrops to lab data and electrical logging. Most relevant unconventional plays of the world. Main characteristics. The petrophysical model. Components and definitions, construction, uncertainties, strengths and weakness. Lab studies: porosity, saturation, mineralogy, organic geochemistry and permeability. Electrical logging response on unconventional shale plays: triple combo, NMR, NMR T1T2, nuclear spectroscopy, spectral GR, dielectric. The effect of maturity on kerogen. Challenges on water saturation calculation. Data integration. Interpretation workflows and core calibration.

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American Association of Petroleum Geologists (AAPG)
VG Abstract

In 1991, Gulf Indonesia and its partners discovered South Sumatra Basin’s first major gas field at Dayung in the Corridor PSC. A key feature of this field is that most of the reserves are held within fractured basement rocks of pre-Tertiary age. 

Request a visit from Charles Caughey!

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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Request a visit from Ameed Ghori!

American Association of Petroleum Geologists (AAPG)

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