塔里木盆地塔河油田奥陶系油气成藏演化过程研究

STUDY OF THE EVOLUTION PROCESS OF THE ORDOVICIAN OIL RESERVOIR IN THE TAHE OILFIELD, THE TARIM BASIN

吕海涛 张卫彪 张达景 林忠民 赵锡奎 李坤

Lü Haitao Zhang Weibiao Zhang Dajing Lin Zhongming Zhao Xikui Li Kun

中国石油化工股份有限公司西北油田分公司勘探开发研究院, 乌鲁木齐 830011 2. 中国石油化工股份有限公司石油勘探开发研究院, 北京 100083 3. 成都理工大学油气藏地质及开发工程国家重点实验室, 成都 610059

Exploration and Production Research Institute of Northwest Oilfield Branch, SINOPEC, Urumqi, Xinjiang 830011, China 2. Research Institute of Exploration and Production, SINOPEC, Beijing 100083, China 3. State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China

塔河油田奥陶系油气藏主产层为中下奥陶统灰岩,储层类型为岩溶缝洞型,岩溶形成期与演化对油气成藏演化起着重要影响.通过奥陶系岩溶储层特征、油气分布特征、油气成藏期等研究,结合构造、圈闭等成果,认为塔河油田奥陶系油气藏具有多期充注成藏特征,其演化过程可概括为"加里东晚期-海西早期油气聚集与改造-海西晚期油气充注与调整改造-喜马拉雅晚期油气充注及再调整";加里东晚期-海西早期大规模油气成藏遭受破坏后残存的古油藏,是现今塔河油田奥陶系稠油藏的基础,经历后期的油气充注与调整改造,造就现今奥陶系油气分布的复杂面貌.

The Ordovician oil reservoir in Tahe Oilfield,the northern Tarim Basin is so far the largest marine carbonate reservoir in China.Its main output layer is the karstic Lower-Middle Ordovician limestone.Based on the study of the Ordovician karstic reservoir rock,oil distribution,oil charge epoch,and considering the related study of structure and trap,it is concluded that the oil reservoir has been thrice charged,its evolution process can be summarized as "late Caledonian-early Hercynian oil accumulation and alteration-late Hercynian oil filling and adjustment-late Himalayan oil filling and readjustment".The large-scale palaeo-reservoir accumulated and altered in the late Caledonian-early Hercynian period is the basis of nowadays Ordovician heavy oil reservoir in the Tahe Oilfield.As a result of multiple oil charge and adjustment,the distribution of the Tahe Ordovician oils is complex enough.

中国石化科技部项目(P04026)

https://doi.org/10.11781/sysydz200806547