论文部分内容阅读
石炭系东河砂岩是塔里木盆地塔中40油田的储集层,在成藏过程中伴生了大量的流体包裹体,流体包裹体的均一温度明显分为88.6～100.73℃和122.1～144.7℃二个区间,它们可能反映了油藏形成的不同时间和深度,反映了两个不同的成藏期。根据该区储集层的埋藏史、热演化史和烃源岩的演化史推测,第一成藏期发生在侏罗纪,由于后来的构造运动,油藏几乎全部被破坏;第二成藏期发生在第三纪,并保存到现今。在荧光薄片中,发现一些石英次生加大边与石英颗粒之间有油质沥青存在,这可能是在第一成藏期形成的。成岩作用研究结果认为,二次成藏的时间和深度与运用流体包裹体的均一温度研究油藏所得出的结论大致相当,说明利用流体包裹体的均一温度研究油藏成藏期次是可行的,结论是正确的。
Carboniferous Donghe sandstone is a reservoir of Tazhong 40 oilfield in Tarim Basin. During the process of hydrocarbon accumulation, a large number of fluid inclusions are associated with the homogenization temperature of the fluid inclusions, which are obviously divided into 88.6 ~ 100.73 ℃ and 122.1 ~ 144.7 ℃ They may reflect the different time and depth of reservoir formation and reflect two different periods of hydrocarbon accumulation. According to the burial history, thermal evolution history and evolution history of source rocks in this area, it is presumed that the first hydrocarbon accumulation occurred in the Jurassic and almost all the reservoirs were destroyed due to later tectonic movement. Period occurred in the Tertiary, and preserved until now. In the fluorescent sheet, it was found that some quartz secondary growth edge and quartz particles exist between the oil pitch, which may be formed during the first reservoir. The study of diagenesis shows that the time and depth of secondary accumulation are similar to those of reservoirs using the uniform temperature of the fluid inclusions. It is feasible to use the uniform temperature of fluid inclusions to study the reservoir formation period , The conclusion is correct.