Determining static reservoir connectivity using noble gases

Experimental Study on Factors Affecting Oil Recovery in Sandstone-Buried Hill Superimposed Reservoirs

“…Additionally, a weathered crust layer has developed between the sandstone and the buried hills, where the fracture structure of the weathered crust is weaker than that of the buried hills. Due to their unique geological characteristics and relatively high oil reserves, these types of reservoirs have increasingly attracted attention. − The connectivity between reservoirs, the heterogeneity, and the strategy of development are the critical factors affecting the efficacy of reservoir exploitation. − Reservoir connectivity can be determined by comparing the differences in well logging curves across various strata between adjacent oil and water wells . It can also be assessed by introducing tracers and detecting their production within the same well group unit to understand the connectivity between injection and production wells. − Additionally, it can be conducted using data inversion methods. − Studies on the impact of interlayer heterogeneity and development methods on development effectiveness can utilize numerical simulations, physical simulations, and mechanistic research, among other strategies. − …”

“… 7 − 9 The connectivity between reservoirs, the heterogeneity, and the strategy of development are the critical factors affecting the efficacy of reservoir exploitation. 10 − 12 Reservoir connectivity can be determined by comparing the differences in well logging curves across various strata between adjacent oil and water wells. 13 It can also be assessed by introducing tracers and detecting their production within the same well group unit to understand the connectivity between injection and production wells.…”

The effect of Cenozoic basin inversion on coal-bed methane in Liupanshui Coalfield, Southern China

“…Geochemical and stable isotope studies of CBM have revealed much about gas generation processes and subsequent evolution, e.g., the addition of external hydrocarbons and gas escape, which are critical to the estimation of resource potential, and assessing potential environmental impacts on its exploitation (e.g., Liu et al, 2019;Moore, 2012;Vinson et al, 2017;Zazzeri et al, 2016). While the trace noble gases have been used extensively to trace the origin and interaction history of fluids in conventional petroleum and natural gas systems (e.g., Ballentine et al, 1991;Battani et al, 2000;Scott et al 2021), their application on CBM is limited. Previous studies have shown that noble gases can track the role of groundwater in CBM production and constraint the timescale of hydrogeological processes that have affected hydrocarbon preservation (Zhou and Ballentine, 2006;Zhou et al, 2005).…”