Open or closed geochemical systems during diagenesis in sedimentary basins: Constraints on mass transfer during diagenesis and the prediction of porosity in sandstone and carbonate reservoirs

Material Exchange and Migration between Pore Fluids and Sandstones during Diagenetic Processes in Rift Basins: A Case Study Based on Analysis of Diagenetic Products in Dongying Sag, Bohai Bay Basin, East China

“…Precipitation of authigenic quartz occurred in the diagenesis process ( Figure 16) as the concentration of SiO 2 (aq) (<100 ppm) in lake waters was too low for authigenic quartz [11]. There were no external sources of free SiO 2 for sandstones of Es in Dongying Sag [35].…”

“…Formation and evolution of diagenetic products could result in preservation or destruction of primary pores as well as formation and transformation of secondary pores, which could significantly influence the formation and occurrence of effective reservoirs in the deep part of petroliferous basins [4][5][6][7][8][9][10][11][12][13][14][15][16]. Previous studies mainly highlighted evolution of physical properties of clastic rocks and primarily investigated diagenetic facies and sequences based on sedimentological and petrological analyses [11,[17][18][19][20][21][22][23][24][25][26]. However, insufficient attention was paid to the nature of diagenesis, namely, the exchange and migration of basin materials loaded by pore fluids.…”

Genetic mechanisms of secondary pore development zones of Es 4 x in the north zone of the Minfeng Sag in the Dongying Depression, East China

“…Some authors believe that these features form by mineral dissolution in low porosity reservoirs at deep burial depths (Yuan and Wang 2001). Other authors, however, believe that the large amounts of secondary pores that form in these shallow formations are effectively preserved during deep burial, while primary pores are destroyed, which results in the formation of deep SPDZs Ma et al 2005;Zhang et al 2008;Bjørlykke and Jahren 2012;Bjørlykke 2014).…”

Selective dissolution of eodiagenesis cements and its impact on the quality evolution of reservoirs in the Xing’anling Group, Suderte Oil Field, Hailar Basin, China

“…However, there is significant disagreement among various authors regarding burial dissolution of carbonate cements in clastic reservoirs. In broad terms, there are two major schools of thought (Bjørlykke and Jahren 2012;Giles 1987;Giles and Marshall 1986;Yuan et al 2015a, b). One group of authors considers that carbonate cements can be leached during burial to generate significant secondary porosity and improve reservoir quality (Schmidt and McDonald 1979;Zhong et al 2003;Yu and Lai 2006).…”

“…One group of authors considers that carbonate cements can be leached during burial to generate significant secondary porosity and improve reservoir quality (Schmidt and McDonald 1979;Zhong et al 2003;Yu and Lai 2006). The other group of authors suggests that carbonate cement cannot be dissolved extensively at the deep burial stage, but that carbonate cementation degrades reservoir porosity and permeability (Bjørlykke and Jahren 2012;Giles and Marshall 1986;Taylor et al 2010;Yuan et al 2013Yuan et al , 2015aShou 2005). The reservoirs in the Xing'anling Group in the Suderte Oilfield of the Hailar Basin, which are characterized by abundant volcanic materials, are mostly low to ultra-low permeability reservoirs .…”