石油与天然气地质 ›› 2014, Vol. 35 ›› Issue (6): 753-762.doi: 10.11743/ogg20140602

• 专家论坛 • 上一篇    下一篇

塔里木盆地顺南-古城地区奥陶系鹰山组天然气气源与深层天然气勘探前景

王铁冠1, 宋到福1, 李美俊1, 杨程宇1, 倪智勇1, 李慧莉2, 曹自成2, 张宝收3, 冯子辉4   

  1. 1. 中国石油大学 油气资源与探测国家重点实验室, 北京 102249;
    2. 中国石化 西北油田分公司 勘探开发研究院, 新疆 乌鲁木齐 830011;
    3. 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;
    4. 中国石油 大庆油田有限责任公司 勘探开发研究院, 黑龙江 大庆163712
  • 收稿日期:2014-11-01 出版日期:2014-12-08 发布日期:2015-01-27
  • 第一作者简介:王铁冠(1937-), 男, 中国科学院院士, 有机地球化学和石油地质学.E-mail:wwttgg2003@yahoo.cn.

Natural gas source and deep gas exploration potential of the Ordovician Yingshan Formation in the Shunnan-Gucheng region, Tarim Basin

Wang Tieguan1, Song Daofu1, Li Meijun1, Yang Chengyu1, Ni Zhiyong1, Li Huili2, Cao Zicheng2, Zhang Baoshou3, Feng Zihui4   

  1. 1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
    2. Research Institute of Petroleum Exploration and Production, SINOPEC Northwest Oilfield Company, Urumqi, Xinjiang 830011, China;
    3. Research Institute of Petroleum Exploration and Development, Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China;
    4. Research Institute of Petroleum Exploration and Development, PetroChina Daqing Oilfield Company Ltd., Daqing, Helongjiang 163712, China
  • Received:2014-11-01 Online:2014-12-08 Published:2015-01-27

PDF (PC)

577

被引次数

28

摘要： 顺南-古城地区处于在塔里木盆地顺托果勒低隆起(阿满低隆)、卡塔克隆起(塔中隆起)和古城墟隆起(古城低隆)3个构造单元的汇聚部位.近3年来,在顺南-古城地区的中-下奥陶统鹰山组或中奥陶统一间房组-中、下奥陶统鹰山组(以鹰山组为主)及其毗邻的塔中隆起塔中1号构造下寒武统肖尔布拉克组的碳酸盐岩中,已经有11口探井获得天然气流,天然气产量最高可达165.8×104 m3/d (顺南5井无阻流量)和107.8×104 m3/d (古城9井),显示顺南-古城地区丰富的天然气资源潜力.对顺南-古城地区以及塔中1号构造的11口探井的天然气烃类组分与稳定碳同位素组成的气-气对比表明:天然气干燥系数C1/C1-5值达0.99~1.00,属于过成熟干气范畴;天然气碳同位素组成δ13C1-δ13C4值均大于-42.5‰,与塔里木盆地台盆区不同源的典型天然气对比,确认天然气源自寒武系气源层.以顺南4井为例,采用流体包裹体测温-单井地层埋藏史数值模拟-实测地层Ro(镜质体反射率)剖面校正热史的集成技术,厘定中奥陶统一间房组-中、下奥陶统鹰山组(以鹰山组为主)气藏属于一期成藏,天然气充注时间为22～10 Ma(中新世),属于晚期成藏,有利于天然气资源的保存.

关键词: 成藏时间, 气源层, 鹰山组, 深层天然气, 顺南-古城地区

Abstract: Shunnan-Gucheng region is located at the convergence of three structural units: Shuntuoguole Low Uplift (Aman low Uplift), Katake Uplift (Tazhong Uplift) and Guchengxu Uplift (Gucheng Low Uplift), in Tarim Basin. In recent years, gas flows have been tested in 11 exploratory wells drilled into the carbonate reservoirs in the Middle-Lower Odovician Yingshan Fm. or the Middle Odovician Yijianfang Fm. -Middle-Lower Odovician Yingshan Fm. (mainly the Yingshan Fm.)in Shunnan-Gucheng region and the Lower Cambrian Xiaoerbulake Fm. in the Tazhong No. 1 Structure of the basin. Among the 11 wells, the well Shunan-5 and Gucheng-9 tested the highest flow rate of 165. 8×104 m3/d (open flow)and 107. 8×104 m3/d, respectively, showing great gas potential in Shunnan-Gucheng region. Composition analyses of hydrocarbon and stable carbon isotopes of gas samples from 11 wells in Shunnan-Gucheng region and Tazhong No. 1 Structure indicate an over-matured dry gas, with dry coefficient between 0. 99 and 1. 00 and carbon isotopic values (δ13C1-δ13C4) bigger than-42. 5‰. Correlation with the typical gas samples with different sources in Tarim Basin reveals that the gas in Shunnan-Gucheng region originated from source rocks in the Cambrian. Combining fluid inclusion microthermometry with single well numerical modeling of stratigraphic burial as well as thermal histories and measurement of vitrinite reflectance Ro profile on samples from Well Shunnan-4, we determined that the studied gas reservoirs were typical late-stage gas accumulations with gas-charging occuring druing the Miocene (22-10 Ma).

Key words: timing of hydrocarbon accumulation, gas source rock, Yingshan Formation, deep gas, Shunnan-Gucheng region

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