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烃源岩的热演化、盖层的封闭性动态演化均受构造演化控制.中国南方海相层系经历了多期构造事件的叠加改造,明确控制源盖动态演化的关键构造事件,对保存条件有效性研究具有重要意义.从南方海相层系埋藏史类型、海相烃源岩的生烃过程、盖层的封闭性演化、油气藏保存和古油藏破坏与J3-K1构造事件的关系,论述了J3-K1构造事件对南方海相源盖成藏要素的控制作用.结果表明,J3-K1期间持续沉降埋深的地区,海相烃源岩长期持续生烃,生烃结束时间相对较晚,上覆盖层封闭性不断加强,油气得以保存.J3-K1期间遭受挤压变形、褶皱冲断、抬升剥蚀的地区,形成了早抬型埋藏史类型、海相烃源岩的生烃过程在J3-K1期间终止(或中止)、盖层封闭性减弱或被剥蚀殆尽,海相油气的保存条件遭受破坏.中国南方海相油气勘探的战略选区方向为J3-K1期间持续埋深沉降的地区.
The thermal evolution of source rocks and the closed dynamic evolution of caprock are controlled by tectonic evolution.The marine facies in southern China experienced superposition and remodeling of multistage tectonic events and clearly controlled the key tectonic events of dynamic evolution of source cap, The validity study is of great significance.Researching on the relationship between the type of burial history in the marine strata of the South China Sea, the hydrocarbon generation process of the marine source rocks, the closed evolution of the cap rocks, the preservation of reservoirs and the destruction of paleo-oil reservoirs, and the J3-K1 tectonic event , And discussed the controlling effect of J3-K1 tectonic event on the reservoir forming elements of the southern marine source cap.The results show that in the areas with continuous subsidence depth during J3-K1, the marine hydrocarbon source rocks have a long-term continuous hydrocarbon generation and hydrocarbon generation end time Later, the sealing of the upper overburden ceaseless and the oil and gas can be preserved.The area where J3-K1 was subjected to extrusion deformation, fold thrust, uplift and denudation formed the type of early uplift burial history, hydrocarbon generation from marine source rocks During the period J3-K1, the process was terminated (or suspended), the seal of the caprock was weakened or denuded, and the preservation conditions of the marine oil and gas were damaged. The strategic selection direction of the marine oil and gas exploration in southern China was the continuous deep buried during J3-K1 Drop in the area.