东营凹陷热流体活动及其对水-岩相互作用的影响

从气体地球化学、有机质热变、包裹体均一温度、古地温梯度、成岩矿物、重金属元素和岩浆活动等方面证实了东营凹陷发生了大量的热流体活动.热流体主要沿活动性较强的深大断裂运移至浅部, 并以侧向强迫对流为主, 同时具有多期次活动的特点.热流体通过改变温度场和地温梯度以及带入一些无机物质, 导致水-岩相互作用强度和类型的差异. 

THERMAL FLUID ACTIVITIES AND THEIR EFFECTS ON WATER-ROCK INTERACTION IN DONGYING SAG

A large number of thermal fluid activities that occurred in Dongying sag can be proved in terms of gas geochemistry, organic matter thermal metamorphism, homogeneous temperature in fluid inclusions, palaeotemperature gradient, diagenetic mineral, heavy metal element and magmatic activity. The thermal fluids migrate along the deep and large faults whose activities are relatively strong to the shallow parts, and at the same time the corresponding migration pattern centers on the lateral forced convection. In addition, the thermal fluids in the Dongying sag are characterized by the multi_phase activities. The changes in temperature field and geothermal gradient and the mixture of some inorganic matters into the thermal fluids both result in the differences in water_rock interaction intensities and types.