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Bulletin Article

 
The nanometer-scale architecture of organic matter (OM) and associated pores in highly mature gas shales from the lower Silurian Longmaxi Formation in the upper Yangtze platform of south China were investigated using field emission scanning electron microscopy (SEM), focused ion beam SEM, and low-pressure gas (N2 and CO2) adsorption bulk pore characterization.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/04101917386 The architecture of organic matter and its pores in highly mature gas shales of the lower Silurian Longmaxi Formation in the upper Yangtze platform, south China
 
Thin-section analysis, field emission scanning electron microscopy, constant-rate mercury injection (CRMI), x-ray–computed tomography (X-CT), and nuclear magnetic resonance (NMR) were used to investigate pore systems, pore sizes, and pore-throat distributions and determine evaluation criteria for tight oil reservoirs.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/03061917284 Characteristics of micropores, pore throats, and movable fluids in the tight sandstone oil reservoirs of the Yanchang Formation in the southwestern Ordos Basin, China
 
This paper investigates transport mechanisms involving carbonate cementation in Eocene, tight-oil sandstones in Bohai Bay Basin, China, to determine potential mass transfer between adjacent mudstones and sandstones.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/04101917330 Carbonate cementation patterns, potential mass transfer, and implications for reservoir heterogeneity in Eocene tight-oil sandstones, Dongying depression, Bohai Bay Basin, China: Evidence from petrology, geochemistry, and numerical modeling
 
This study analyzes the pore systems of the Majiagou carbonate reservoirs, Ordos Basin, China. The occurrence of small and large pores results in a heterogeneous pore distribution and a high fractal dimension. Reservoir quality increases with the degree of complexity of the microscopic pore structure.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/02251917173 Pore structure and fractal characteristics of Ordovician Majiagou carbonate reservoirs in Ordos Basin, China
 
The purpose of this paper is to investigate the diagenetic process of sandstones from the Upper Paleozoic, Linxing area, Ordos Basin, China, to evaluate the factors controlling compaction, cementation, and dissolution that affect reservoir quality, and to reconstruct the diagenetic history of the region.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/03061918062 Diagenetic sequences of continuously deposited tight sandstones in various environments: A case study from upper Paleozoic sandstones in the Linxing area, eastern Ordos basin, China
 
Using generated, retained, and expelled amounts of hydrocarbons during maturation in the Yanchang Formation, Ordos Basin, the authors calculate expulsion efficiency of individual n-alkanes. With inorganic and organic controls, a hydrocarbon generation-retention-expulsion model is developed.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/01301917052 Oil retention and intrasource migration in the organic-rich lacustrine Chang 7 shale of the Upper Triassic Yanchang Formation, Ordos Basin, central China
 
A new mathematical model is proposed to calculate the horizontal principal stresses in the context of fault-related folds. The southwest Qaidam Basin, China, is used as a case study to validate the proposed mathematical model.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/01211917156 Mathematical model for calculating the horizontal principal stress of a faulted monoclinal structure in southwest Qaidam Basin, China
 
Using recently acquired three-dimensional seismic data, we summarize typical patterns for seismic-based identification and stage analysis of sedimentary units in the Eocene succession of the southern slope-break belts of the Bozhong sag, Bohai Bay Basin, China.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/02151916513 Seismic-based identification and stage analysis of overlapped compound sedimentary units in rifted lacustrine basins: An example from the Bozhong sag, Bohai Bay Basin, China
 
Calcite cementation has been identified as an active process in the Upper Triassic Yanchang Formation throughout its burial history and as a major diagenetic factor causing strong reservoir heterogeneities.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18101-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/01301918093 Geochemical constraints on the origins of calcite cements and their impacts on reservoir heterogeneities: A case study on tight oil sandstones of the Upper Triassic Yanchang Formation, southwestern Ordos Basin, China

Explorer Article

 

Congratulations to Paul Weimer, Martha Lou Broussard, Fred Schroeder, Margot and Ned Timbel and the many other AAPG Award Winners who will be recognized at the 2020 AAPG Annual Convention and Exhibition in Houston, June 7-10. Paul Weimer is the recipient of the Association’s highest honor, the AAPG Sidney Powers Memorial Award. Martha Lou Broussard joins him at the top of the awardees list as this year’s Michel T. Halbouty Outstanding Leadership Award recipient.

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