石油与天然气地质 ›› 2006, Vol. 27 ›› Issue (5): 682-688.doi: 10.11743/ogg20060514

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松辽盆地南部十屋断陷地表烃类异常特征及油气指示意义

夏响华1,2, 胡凯1, 秦建中2   

  1. 1. 南京大学,地球科学系,江苏,南京,210093;
    2. 中国石油化工股份有限公司石油勘探开发研究院,无锡石油地质研究所,江苏,无锡,214151
  • 收稿日期:2006-08-17 出版日期:2006-10-25 发布日期:2012-01-16
  • 基金资助:

    中国石油天然气集团公司“九五”重点科技攻关项目(970211)

Characteristics of surface hydrocarbon anomalies in Shiwu faulted depression in southern Songliao basin and their significance as an oil/gas indicator

Xia Xianghua1,2, Hu Kai1, Qin Jianzhong2   

  1. 1. Department of Earth Sciences, Nanjing University, Nanjing, Jiangsu 210093;
    2. Wuxi Research Unit of Petroleum Geology, Petroleum Exploration and Production Research Institute, SINOPEC, Wuxi, Jiangsu 214151
  • Received:2006-08-17 Online:2006-10-25 Published:2012-01-16

摘要:

地表油气化探技术根据油气微渗漏在地表的异常显示特征预测深部油气藏,已经有70余年历史。大多数人都认可油气藏能发生油气微渗漏这一自然现象,但对深部油气藏与地表化探异常之间的复杂关系尚存疑虑。十屋断陷已知油气藏油气微渗漏检测结果显示,该区各项化探指标均为低背景非均匀地球化学场特征,异常点浓度较高;与油气藏有关的异常呈环状或复杂环状形态,受断层和盖层条件影响而产生的异常为条带状或块状形态。油藏和油气藏微渗漏异常特征不同,气田上方异常强度低,为简单环状;而油气田上为复杂环状(环内也有部分指标异常)。

关键词: 油气, 微渗漏, 异常形态, 异常特征, 十屋断陷, 松辽盆地南部

Abstract:

For more than 70 years,surface geochemical exploration technology has been applied in the prediction of deep oil and gas reservoirs through observing anomalous surface expression of hydrocarbon microseepage.It is generally accepted that hydrocarbon may leak from reservoirs through microseepage,but the complex relationship between surface geochemical anomaly and deep hydrocarbon accumulation has not yet been proven.Hydrocarbon microseepage detection in the known oil and gas accumulation in Shiwu faulted depression shows that all of the geochemical indicators in this area are characterized’by heterogeneous geochemical field with low background value,and the concentration of hydrocarbons in the anomalous area is relatively high.The anomalies related to oil and gas accumulation are annular or complex annular while the anomalies caused by a fault or cap rock are banded or block-shaped.The microseepage anomaly in a gas field has different features with that in an oil and gas field.The former is low in intensity and simply annular in shape,while the latter is complicated annular in shape,with some anomalous indicators occurring within the ring.

Key words: hydrocarbon, microseepage, anomaly shape, anomaly characteristics, Shiwu faulted depression, southern songliao basin

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