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- W4386989771 abstract "(1) Continuous tight oil/gas reservoirs are widely developed in deep petroliferous basins, and their dynamic mechanism for oil/gas migration and accumulation is related to oil/gas generation and expulsion from their surrounding source rocks dealing with 5 types and 9 driving forces, including diffusion of oil/gas, thermal volume expansion of minerals and fluids, compaction of overlying strata, new products volume increasing, and capillary pressure difference (CPD) between the reservoirs and surrounding rocks. (2) Buoyancy-driving dominates the oil/gas migration and accumulation in reservoirs with high porosity and permeability, while capillary pressure difference (CPD) between surrounding source rocks and nearby reservoir layers is more important for oil/gas migration out of source rocks and accumulation in deeper and tighter reservoirs with increasing depth. (3) The effective CPD is the most important driving force for deep tight oil/gas reservoirs formation. The accumulative natural gas and liquid hydrocarbon expelled by per cubic meter of Cambrian source rocks in the Tarim Basin are 1.0–1.5 m3 and 0.5–1.0 kg, respectively. The contribution of CPD is the largest with an average of more than 50%, followed by compaction (10–40%), with the third of kerogen transformation and clay dehydration (5–30%), the fourth of thermal expansion of rock fluid (2–20%), and the least is the diffusion (< 10%). (4) Effective Capillary Pressure Difference, or the CPD subtract capillary resistance of oil/gas migrating in reservoirs, is the dominant driving force for oil/gas migration out of source rocks and accumulation in deep and tight reservoir layers, oil/gas saturation, daily production, proved reserve in reservoir layers and reservoirs number directly increases with increasing the value of ECPD. (5) Dynamic process of oil/gas accumulations in reservoirs during their burial and densification is divided into four stages: buoyancy are dominant driving forces in shallow stage; multi-driving forces including ECPD and buoyance are essential in middle stage; ECPD is the most important in deep stage; and the stress and geofluids activities control the reformation and adjustment of formed oil/gas reservoirs in final stage." @default.
- W4386989771 created "2023-09-24" @default.
- W4386989771 creator A5018152817 @default.
- W4386989771 date "2023-01-01" @default.
- W4386989771 modified "2023-10-18" @default.
- W4386989771 title "Prediction and Evaluation of Tight Oil and Gas Reservoirs" @default.
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- W4386989771 doi "https://doi.org/10.1007/978-981-99-0325-2_8" @default.
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