Mesozoic (Upper Jurassic–Lower Cretaceous) deep gas reservoir play, central and eastern Gulf coastal plain

Basin Analysis and Petroleum System Characterization and Modeling, Interior Salt Basins, Central and Eastern Gulf of Mexico

“…Our description of the Smackover petroleum system in the North Louisiana Salt Basin is consistent with how this petroleum system has been characterized in the Mississippi Interior Salt Basin by Mancini et al (2003) and in our 2006 DOE report on the resource assessment of the deep gas resource of the onshore interior salt basins for the North Louisiana Salt Basin (Mancini et al, 2006a(Mancini et al, , 2008a. We summarize the description of this petroleum system as follows (Fig.…”

“…332). Organic-rich and laminated lime mudstone of the lower to middle beds of the Upper Jurassic Smackover Formation serves as the regional source rock (Oehler, 1984;Sassen et al, 1987;Claypool and Mancini, 1989;Mancini et al, 2003Mancini et al, , 2008a. Present-day Smackover microbial and amorphous lime mudstone beds average 0.58% of TOC in the North Louisiana Salt Basin (Table 2).…”

“…Thermal maturation of the Type IIS kerogen in the Smackover exhibited vitrinite reflectance (Ro) percents of 0.5 (TAI of 2-) to 1.89 (TAI of 3+). Thermally mature Smackover source rock samples have HI values of 14-94 mg HC/g TOC (Table 5), with an average of 39 HC/g TOC (Mancini et al, 2008a). Sassen and Moore (1988) The generation of crude oil from the Smackover source rocks in the North Louisiana Salt Basin has been interpreted to have been initiated at a level of thermal maturity of 0.55% Ro (435°C T max ; 2 TAI) and concluded at a level of thermal maturity of 1.5% Ro (470°C T max ; 3 TAI) (Nunn and Sassen 1986;Sassen and Moore 1988).…”

An experimental comparison of gas generation from three oil fractions: Implications for the chemical and stable carbon isotopic signatures of oil cracking gas

“…The accumulation of gases associated with oil cracking has been well documented for many basins (Prinzhofer and Huc, 1995;Huc et al, 2000;Lewan, 2002;Isaksen, 2004;Zhao et al, 2005;Ma et al, 2007;Tian et al, 2007;Mancini et al, 2008). Knowledge of the chemical and carbon isotopes of the gases is important for the evaluation of such resources.…”

A comparative experimental study on gas generation from saturated and aromatic hydrocarbons isolated from a Cambrian oil in Tarim basin

“…The accumulation of gases associated with oil cracking has been well documented in many basins (Prinzhofer and Huc, 1995;Lewan, 2002;Isaken, 2004;Zhao et al, 2005;Ma et al, 2007;Tian et al, 2007;Mancini et al, 2008). Numerous experiments have been performed on crude oils to investigate their thermal stability and cracking mechanisms (Ungerer et al, 1988;Behar et al, 1991;Horsfield et al, 1992;Pepper and Dodd, 1995;Schenk et al, 1997;Tsuzuki et al, 1999;Huang and Otten, 2001;Hill et al, 2003;Tang et al, 2005).…”