Genetic mechanism of multiphase states of Ordovician oil and gas reservoirs in Fuman oilfield, Tarim Basin, China

Significant Control of Gas Invasion to the Phase Behavior of Deep-Seated Hydrocarbon Fluids in Western Junggar Basin, NW China

“…Previous investigations suggest that the gas invasion effect can significantly enhance GOR and the proportion of light hydrocarbon components, leading to a transition in fluid phases from black oil to volatile oil, condensate, and gas. 5 , 30 Analyzing phase state, GOR, crude oil density, and hydrocarbon composition along the northwest–southeast direction reveals that gas proportion decreases as wells move away from the Penyijingxi Sag. Shallow reservoirs exhibit lower gas contents compared to deeper ones.…”

“…Deep-seated (>4500 m) oil and gas exploration has advanced significantly worldwide, making it the forefront of exploration endeavors, which is viewed as the future replacement for conventional oil and gas exploration. − Deep-seated reservoirs typically exhibit a wide range of oil and gas phase states, including black oil, volatile oil, condensate, and gas. − These variations can be typically attributed to the high thermal maturity of source rocks , and various transformative processes like mixing, gas invasion, , and crude oil cracking. , Different phases of oil and gas possess unique patterns of accumulation and necessitate diverse exploitation techniques. The study of the oil and gas phase behavior plays a crucial role in deploying effective exploration strategies and devising optimal production schemes.…”

Facies and geochemical characteristics of the Middle-Lower Ordovician Yingshan Formation in the Tarim Basin, NW China: Implications for the high-frequency sequence stratigraphy in shallow-water carbonate platform

“…The Yingshan Formation is an important hydrocarbon reservoir of the Tarim Basin (Qi, 2016; Wang et al, 2023). The oils in Ordovician reservoirs were derived from the Lower Cambrian source rock (Cai et al, 2009, 2015, 2016).…”

“…The Yingshan Formation is deposited on a shallow-water carbonate platform during the Middle-Lower Ordovician in the western Tarim Basin (Lin et al, 2012; Zhao et al, 2009). Oil and gas fields, such as Tahe, Shunbei, and Fuman, were discovered in Yingshan Formation in the Tarim Basin (Qi, 2016; Wang et al, 2023). Recently, a major breakthrough has been obtained in the high-energy intraplatform shoal in Fudong 1 Well in the Ordovician Yingshan Formation (Wang, 2023; Wang et al, 2023).…”

“…Oil and gas fields, such as Tahe, Shunbei, and Fuman, were discovered in Yingshan Formation in the Tarim Basin (Qi, 2016; Wang et al, 2023). Recently, a major breakthrough has been obtained in the high-energy intraplatform shoal in Fudong 1 Well in the Ordovician Yingshan Formation (Wang, 2023; Wang et al, 2023). Although the third-order depositional sequences have been recognized for the Yingshan Formation in the Tarim Basin (Fan et al, 2007; Zhao et al, 2010), the meter-scale cycles are still rarely studied.…”