油气成藏动力学中的流体动力场

FLUID DYNAMIC FIELDS IN POOL-FORMING DYNAMICS OF OIL AND GAS

叶加仁 王连进 邵荣

Ye Jiaren Wang Lianjin Shao Rong

温度场、压力场、能量场和应力场是流体动力场研究的主要内容。现今温度场一般根据钻井实测地温及大地热流测试确定,古地温场主要依据包裹体均一温度确定。压力场的研究方法颇多,主要有声波测井、实测地层压力和地震层速度方法,前两种方法主要应用于已钻探区,后者则重点应用于非钻探区。在进行能量场分析时,应注重在三维烃源岩体和流体输导体系发育的格架下,恢复古流体势。通常情况下,应力值较大的地域,其流体压力值也较高,对某一具体地区而言,首先应划分单井纵向压实-压力带,然后划分压力系统,最后进行正演模拟,探讨压力形成机制。地下流体动力场之间存在着互相联系、彼此耦合的关系,因此,须用整体的观点系统研究。

Temperature field,pressure field,energy field and stress field are the main contents in the study of fluid dynamic field.The present temperature field is determined by observed temperature in well drilling and the value of geothermal heat flow;palaeo-temperature field is principally determined by the uniform temperature of inclusions.The methods for studying pressure field are mainly acoustic log,observed formation pressure and seismic interval velocity.The first two methods are usually used in drilled areas,the last one is particularly used in undrilled areas.The energy field study should be stressed on the restoration of Palaeo-fluid potential in 3-D hydrocarbon source rock masses and fluid passage systems.In general,the places with higher stress usually have higher pressure.As for particular region,it is of the first importance to divide vertical compaction pressure belt of single well ,then divide pressure system,and finally make forword modeling so as to probe pressure forming mechanism.Underground fluid fields are connected and coupled with each other,one must consider the fluid dynamic fields as a whole.

10.11743/ogg19990221