Dongsha Waters in the northern South China Sea margin Mesozoic hydrocarbon P-wave velocity dispersion and attenuation Research & information: general XRD Yinggehai airflow reversal anelasticity asymmetric failure biomarker conformance control control measures crack strain creep behavior cyclic steam stimulation deep chamber discrete element method extreme gradient boost (XGBoost) trees fluid pressure fluid-structure interaction force chain network analysis frequency–division amplitude fusion gas outburst gas-liquid two-phase flow heavy oil reservoirs hydraulic fracture in situ conversion project infrared spectrum inlet pressure lattice Boltzmann method