Petroleum phase evolution at high temperature: A combined study of oil cracking experiment and deep oil in Dongying Depression, eastern China

Qiao, Rongzhen; Chen, Zhonghong

doi:10.1016/j.fuel.2022.124978

Cited by 16 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher the molar percentage of C 1 -C 5 , the lower the cricondentherm and critical temperature, and the higher the cricondenbar. 30 Assuming that the current hydrocarbon composition in the P 3 w reservoir in Well Zheng 10 is the same as that at 23 Ma, the current hydrocarbons in the P 3 w reservoir are still in the liquid rather than the condensate gas under present-day reservoir temperature and pressure (Figure 9a). Alternatively, assuming that the hydrocarbon composition in the P 3 w reservoir at 23 Ma is the same as that at 0 Ma, the hydrocarbons in the P 3 w reservoir under the temperature and pressure conditions at 23 Ma are condensate gas rather than liquid (Figure 9b).…”

Section: Discussionmentioning

confidence: 99%

“…The hydrocarbon molecular composition and reservoir temperature and pressure have important effects on the hydrocarbon phase state. , Variations in hydrocarbon components can lead to significant differences in phase states. The higher the molar percentage of C 1 -C 5 , the lower the cricondentherm and critical temperature, and the higher the cricondenbar .…”

Section: Discussionmentioning

confidence: 99%

“…To identify the phase behavior of the fluid in the P 3 w reservoir of Well Zheng 10, we used empirical parameter discrimination methods and the PVT phase diagram discriminant method. The empirical parameter discrimination methods for hydrocarbon phase determination include triangular fluid component diagram discrimination, block diagram, Z value, and Z 1 -Z 2 factor. , The PVT phase diagram discriminant method is a relatively accurate method for determining hydrocarbon phase states. − …”

Section: Methodsmentioning

confidence: 99%

“…The empirical parameter discrimination methods for hydrocarbon phase determination include triangular fluid component diagram discrimination, block diagram, Z value, and Z 1 -Z 2 factor. 29,30 The PVT phase diagram discriminant method is a relatively accurate method for determining hydrocarbon phase states. 52−54 3.4.…”

Section: Hydrocarbon Phase State Determinationmentioning

confidence: 99%

“…22−25 Studies on hydrocarbon phase states have mainly focused on the identification of fluid phase states, 26,27 the main controlling factors, 10,28,29 and the formation mechanism of reservoirs with different hydrocarbon phase states. 30 The empirical parameter discrimination method and PVT phase diagram discrimination method can be used to determine the hydrocarbon phase states when the reservoir fluids are well mixed. 31 However, the hydrocarbon phase states and physical properties may change in different geological periods.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Hydrocarbon Phase State Evolution and Accumulation Process of Ultradeep Permian Reservoirs in Shawan Sag, Junggar Basin, NW China

Xu,

Lei,

Zhang

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

A large amount of oil and gas has been discovered in the ultradeep reservoirs in the Shawan Sag, Junggar Basin. However, the hydrocarbon phases in ultradeep reservoirs are complex, and the controlling factors and evolution have not been studied, which are important for exploration and development. This study determined the hydrocarbon phase states of the reservoirs in the Upper Wuerhe Formation (P3w) of Well Zheng 10 in the Shawan Sag via hydrocarbon components and a pressure–volume–temperature (PVT) phase diagram. We used 1D basin modeling to simulate the thermal maturity of the Lower Wuerhe (P2w) source rock, components of generated hydrocarbons, reservoir temperature and pressure, and hydrocarbon phase. The results show that the hydrocarbons in the P3w reservoir are secondary condensate gas. The source rock began to enter the threshold of hydrocarbon generation at the end of the Late Triassic, and the thermal maturity (Easy Ro%) of the P2w source rock in the P3w reservoir fetch area is approximately 1.5% at present. The reservoir experienced multiple periods of hydrocarbon charging and phase evolution. During the Late Triassic to the early Late Jurassic and the late Early Cretaceous to the Late Cretaceous, the hydrocarbons in the P3w reservoir were liquid. Since the Miocene, a large amount of gas has migrated to the P3w reservoir, leading to gas invasion, which is the key to the formation of a condensate gas reservoir. The hydrocarbons changed from liquid to condensate gas due to the increasing gas–oil ratio and reservoir temperature. This study provides a quantitative method to reconstruct the phase evolution process and establishes an accumulation model of condensate gas reservoirs.

show abstract

Section: Discussionmentioning

confidence: 99%