Pore fluid evolution, distribution and water-rock interactions of carbonate cements in red-bed sandstone reservoirs in the Dongying Depression, China

2016 ◽  
Vol 72 ◽  
pp. 279-294 ◽  
Author(s):  
Jian Wang ◽  
Yingchang Cao ◽  
Keyu Liu ◽  
Jie Liu ◽  
Xiujie Xue ◽  
...  
Keyword(s):  
Pore Fluid ◽  
Fluid Evolution ◽  
Carbonate Cements ◽  
Dongying Depression ◽  
Sandstone Reservoirs ◽  
Red Bed

Diagenesis and evolution of the lower Eocene red-bed sandstone reservoirs in the Dongying Depression, China

2018 ◽  
Vol 94 ◽  
pp. 230-245 ◽  
Author(s):  
Jian Wang ◽  
Yingchang Cao ◽  
Keyu Liu ◽  
Alessandra Costanzo ◽  
Martin Feely
Keyword(s):  
Lower Eocene ◽  
Dongying Depression ◽  
Sandstone Reservoirs ◽  
Red Bed

scholarly journals Diagenetic Fluid and Its Impact on Sandstone Reservoirs in the Southern Boxing Sag, Dongying Depression, Bohai Bay Basin, China

Geofluids ◽  
2022 ◽  
Vol 2022 ◽  
pp. 1-25
Author(s):  
Zhenhuan Shen ◽  
Zhuang Ruan ◽  
Bingsong Yu ◽  
Shujun Han ◽  
Chenyang Bai ◽  
...  
Keyword(s):  
Clay Minerals ◽  
Late Stage ◽  
Homogenization Temperature ◽  
Mineral Dissolution ◽  
Bohai Bay ◽  
Carbonate Cements ◽  
Dongying Depression ◽  
Carbonate Cementation ◽  
Diagenetic Fluids ◽  
Sandstone Reservoirs

Diagenesis typically exerts a crucial impact on the formation of high-quality sandstone reservoirs in the Eocene Shahejie Formation, Dongying Depression. To better understand the formation process of petrophysical properties, this research conducts petrographic and geochemical analyses to investigate the nature of diagenetic fluids. Petrographic observations suggest that the dominant cements are carbonate, authigenic quartz, and clay minerals, accompanied with the dissolution of feldspar and calcite. The homogenization temperature of aqueous inclusions in quartz overgrowth usually exceeds 90°C corresponding to the maturity of organic matter. Quartz overgrowths contain higher amounts of CaO and Al2O3 than detrital quartz. This indicates that the siliceous fluid mainly originates from the dissolution of feldspar. Moreover, the conversion of clay minerals also provides trace amounts of silica into pore water during the burial process. Carbonate cements consist of early-stage calcite as well as late-stage Fe-calcite and ankerite. Calcite with relatively higher MnO proportions shows yellow luminescence and dissolution signs. Fe-calcite and ankerite cements have a higher homogenization temperature than that of quartz overgrowth and mainly concentrate in FeO and MgO as well as contain a small amount of Na+, K+, and Sr2+. The rare earth element (REE) pattern of bulk mudstone and carbonate cements as well as C–O isotopic evidences indicate that the diagenetic fluids of carbonate cementation are primarily controlled by the adjacent mudstone, whereas mineral dissolution and altered clay minerals in sandstone provide additional cations for the local reprecipitation of late-stage carbonate. Therefore, diagenetic fluids within sandstone reservoirs are typically subject to alkaline–acid–alkaline conditions and are influenced by internal sources in a closed system. Compaction significantly reduces the pore space of sandstone reservoirs in the Boxing Sag. Carbonate cementation further increases the complexity of pore structure and obeys the principle of mass balance.

scholarly journals Experimental assessment of pore fluid distribution and geomechanical changes in saline sandstone reservoirs during and after CO 2 injection

2017 ◽  
Vol 63 ◽  
pp. 356-369 ◽  
Author(s):  
Ismael Falcon-Suarez ◽  
Héctor Marín-Moreno ◽  
Fraser Browning ◽  
Anna Lichtschlag ◽  
Katleen Robert ◽  
...  
Keyword(s):  
Pore Fluid ◽  
Fluid Distribution ◽  
Experimental Assessment ◽  
Sandstone Reservoirs

Carbonate cements in Eocene turbidite sandstones, Dongying depression, Bohai Bay Basin: Origin, distribution, and effect on reservoir properties

AAPG Bulletin ◽  
2022 ◽  
Vol 106 (1) ◽  
pp. 209-240
Author(s):  
Guoqiang Luan ◽  
Karem Azmy ◽  
Chunmei Dong ◽  
Chengyan Lin ◽  
Lihua Ren ◽  
...  
Keyword(s):  
Bohai Bay ◽  
Bohai Bay Basin ◽  
Reservoir Properties ◽  
Carbonate Cements ◽  
Dongying Depression
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