石油与天然气地质 ›› 1985, Vol. 6 ›› Issue (4): 434-439.doi: 10.11743/ogg19850417

• 论文 • 上一篇    下一篇

松辽盆地南部万金塔二氧化碳气田的地质特征及其成因

裘松余, 钟世友   

  1. 地质矿产部吉林石油普查勘探指挥所
  • 收稿日期:1985-06-24 出版日期:1985-12-25 发布日期:2012-01-16

GEOLOGICAL FEATURES OF WANJINTA CO2 FIELD IN SOUTH SONGLIAO BASIN

Qiu Songyu, Zhong Shiyou   

  1. Jilin Head quaters of Petroleum Prospecting and Exploration, Ministry of Geology and Mineral Resources
  • Received:1985-06-24 Online:1985-12-25 Published:2012-01-16

摘要:

五十年代末至六十年代初,经航磁、重力、电法和地震等综合勘探,在松辽盆地东南隆起区德惠凹陷西缘,发现和圈定了万金塔构造(图1)。1964年和1977年,石油工业部先后施工万1和万2井,1978—1983年,地矿部相继施工万3、万4和万5井,均见 CO2气喷;其中,万2、万4、万5三井获得工业性 CO2气流。据测试日产量约为20000~130000立方米,气样分析结果 CO2占84.5—99.8%。该气田储量大、纯度高、埋藏浅,具有开发价值。

Abstract:

Wanjinta CO2 field is located on the western margin of Dehui depression,Songliao Basin.The gas pooled in the Middle Cretaceous Quantou Formation,and is trapped in anticline and stratigraphy-fault-aticline complexities.Thewell yield is more than 20,000m3 of gas per day.The gas comprises 84.5-99.8% of CO2 and a little hydrocarbons.Eachgas pool has its own specific hydrodynamic system.Due to its gravity differ-entiation,the content of hydrocarbon decreases and that of CO2 increases withdepth.The reserve of gas field is quite voluminous and productive.On the ba-sis of δ13C value and regional condition,it is suspected that CO2 was de-rived,and then concentrated,from magmatism.The Early Cretaceous vol-canics to which the Well Wan-5 penetrated more than 939m thick.