| 谭庄-沈丘凹陷油气形成条件分析及勘探思路 |
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| 引用本文： | 金维平,付代国,张庆甫.谭庄-沈丘凹陷油气形成条件分析及勘探思路[J].西北地质,2009,42(1):105-114. |
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| 作者姓名： | 金维平 付代国 张庆甫 |
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| 作者单位： | 1. 河南工程学院,河南,郑州,451191
2. 河南石油勘探局,河南,南阳,473132 |
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| 基金项目： | 中国石油化工集团公司重点科技项目 |
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| 摘 要： | 谭庄-沈丘凹陷位于周口坳陷中部凹陷带，是一个中、新生代两期断陷叠合的次级构造单元，面积近2800km^2。勘探证实凹陷内沉积了巨厚的中生代早白垩纪地层（分布面积2000km^2），其中暗色泥岩平均厚达1250m，在多口探井中见到级别不同、层数不一、厚度不等的油气显示，并在周参10、周11、12、19等多口井见到油气流，显示了该凹陷良好的勘探前景；但至今仍未取得实质性的突破，表明它具有一定的复杂性。究其原因，除了生油岩类型不太理想外，后期改造强烈导致保存条件较差及所采用的技术方法不过关也是非常重要的因素。如何寻找改造弱、破坏小、保存好的构造，是下一步勘探突破的重点，而先进适用的技术方法是关键因素。
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| 关 键 词： | 谭庄-沈丘凹陷 原型盆地演化 石油地质条件 有利地区评价 勘探技术攻关 |
Conditions for Forming Oil-Gas and Thoughts for Further Exploration in Tanzhuang-Shenqiu Depression |
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| JIN Wei-ping,FU Dai-guo,ZHANG Qing-fu.Conditions for Forming Oil-Gas and Thoughts for Further Exploration in Tanzhuang-Shenqiu Depression[J].Northwestern Geology,2009,42(1):105-114. |
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| Authors: | JIN Wei-ping FU Dai-guo ZHANG Qing-fu |
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| Institution: | JIN Wei-ping, FU Dai-guo, ZHANG Qing-fu (1. Henan Technology Institute, Zhengzhou, 451191, Henan, China; 2. Petroleum Exploration Department , Nanyang 473132, Henan, China) |
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| Abstract: | Tanzhuang-Shenqiu depression, with an area of 2 800 km^2, locates in central Zhoukou basin and is a secondary structural unit which underwent two stages of superposition of fault depression during Meso-Cenozoic. The exploration confirms that huge-thick early Cretaceous strata were deposited in Mesozoic in the depression （about 2 000 km^2）, with the dark mudstone having an average thickness of 1 250 m. Oil/gas show different in grade, number of layers, and thickness can be seen in many wells and oil/gas flow is found in wells such as Zhoucan well No. 10, Zhou No. 11, Zhou No. 12, and Zhou No. 19, which indicates a favorable exploration prospect. However, no breakthrough has been achieved up to now, showing the complexity of exploration in this area. Except /or unfavorable source rocks, the poor preservation condition resulting from intensive late reformation and the unfavorable adopted are also two major causes for having not achieved the breakthrough. So, how to locate the slightly reformed, slightly destructed, and well preserved structure is very important for us to achieve a breakthrough in oil/gas exploration and an appropriate technique is also a key factor. |
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| Keywords: | Tan-zhuang depression evolution of original basin petroleum geology condition evaluation of favorable exploration area study on exploration techniques |
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