新疆石油地质

新疆石油地质 ›› 2002, Vol. 23 ›› Issue (4): 338-339.

• 应用技术 • 上一篇    下一篇

流体包裹体在塔中40油田成藏期次研究中的应用

杨威1, 杨栓荣2, 李新生2, 李宇平2, 张丽娟2, 高哲荣1   

  1. 1.中国地质大学(北京),北京 100083;
    2.中国石油 塔里木油田分公司 勘探开发研究院,新疆 库尔勒 841000;
  • 收稿日期:2001-10-24 出版日期:2002-08-01 发布日期:2020-08-10
  • 作者简介:杨威(1971-),男,湖北天门市人,硕士,工程师,从事碳酸盐岩沉积与储集层研究。联系电话：010-69213551

Application of Fluid Inclusion Enclave to Study of Hydrocarbon Accumulation Stages of Tazhong 40 Oil-Field

YANG Wei, YANG Shuan-rong, LI Xin-sheng, LI Yu-ping, ZHANG Li-juan, GAO Zhe-rong   

  • Received:2001-10-24 Online:2002-08-01 Published:2020-08-10
  • About author:YANG Wei (1971-), Male, Master, Engineer, Carbonate Reservoir Study, China University of Geoscience, Beijing,100083, China

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摘要： 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—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—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—温度研究油藏成藏期次是可行的,结论是正确的。

关键词: 塔里木盆地, 塔中40油田, 流体, 包体, 油气藏形成, 温度

Abstract: Tazhong 40 oilfield is a small field recently proved in Tarim basin. Its reservoir is Donghe sandstone of Carboniferous. A lot of fluid inclusion enclaves were formed during its hydrocarbon accumulation with uniform temperature of the enclaves being divided into two intervals ranging from 88.6~100.73 C to 122.1~144.7 C. They reflect different time and depths or represent two different stages of hydrocarbon accumulations. According to the reservoir buried history, thermal alternation history and hydrocarbon source rock evolution history, it is supposed that Jurassic is the first stage of hydrocarbon accumulation, but almost all of its oil pools had been destroyed due to tectonic movements occurred afterwards; Tertiary is the second stage of it and no destruction takes place. It is found from fluorescent thin section that existence of oil-asphalt among quartz secondary outgrowth rims and quartz grains could be formed during the first stage. The results of reservoir diagenesis research show that the time and depth for secondary hydrocarbon accumulation are consistent with the conclusion from fluid inclusion enclave. This explains that using the uniform temperature of fluid inclusion enclave to study stages of hydrocarbon accumulation into reservoirs is feasible, and the conclusion is right.

Key words: Tarim basin, Tazhong 40 oilfield, fluid, inclusion enclave, reservoir formation, temperature

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