新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (6): 692-695.

• 国外油气地质 • 上一篇    下一篇

安第斯山前典型前陆盆地油气成藏特征及主控因素

田纳新1, 陈文学1, 殷进垠1, 马亚松2   

  1. 1.中国石化勘探开发研究院,北京 100083;
    2.中国石化河南油田分公司物探技术研究院,河南南阳 473132
  • 收稿日期:2011-02-17 出版日期:2011-12-01 发布日期:2020-08-20
  • 作者简介:田纳新（1968-）,男,河南南阳人,高级工程师,博士,石油地质,（Tel）13522190690（E-mail）tiannx@pepris.com.

Hydrocarbon Accumulation Features and Main Controlling Factors in Typical Foreland Basins in Pediment of the Andes

TIAN Na-xin1, CHEN Wen-xue1, YIN Jin-yin1, MA Ya-song2   

  1. 1. Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083, China;
    2. Research Institute of Geophysical Prospecting Technology, Henan Oilfield Company, Sinopec, Nanyang, Henan 473132, China
  • Received:2011-02-17 Online:2011-12-01 Published:2020-08-20

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摘要： 南美安第斯造山带东侧与圭亚那地盾之间形成了一系列沉积盆地,其构造演化可分为古生代克拉通边缘、中生代弧后裂谷或大陆边缘裂谷、新生代弧后前陆等3 个阶段。白垩系海相泥页岩和碳酸盐岩为主要烃源岩;发育白垩系、古近系和新近系3 大套以砂岩为主的储集层,白垩系裂谷期形成的暗色泥岩和古近系泥岩可作为良好的盖层,纵向上构成了被动陆缘和前陆层序两套储盖组合。山前带构造圈闭发育,油气藏规模大,主要为正常油;斜坡带发育构造、地层等多种圈闭,油藏规模较小,主要为重质油。主造山期形成的构造最有利于捕获油气;优质储集层和断裂构成了油气运移的输导网络;构造破坏和水洗作用使斜坡带多为稠油油藏。

关键词: 南美洲, 安第斯造山运动, 前陆盆地, 油气藏, 构造特征

Abstract: A series of sedimentary basins were formed between eastern Andes folded belt and Guyana shield. The history of tectonic evolution can be divided into three stages: the Palaeozoic craton margin stage, the Mesozoic back-arc rifting or continental marginal rifting stage and the Cenozoic back-arc foreland stage. The main hydrocarbon source rocks are the Cretaceous marine shale and carbonate rocks. The Cretaceous and Tertiary reservoirs dominated by sandstone are developed. The Cretaceous dark mud formed in rifting stage and the Paleogene mud can be the good cap rocks, which constitute two sets of reservoir-cap assemblages vertically: passive continental margin and foreland sequence. The structural traps are developed in pediment folded belt and the discovered reservoirs are large in size. The fluids in them are mainly oil, light oil and gas. Various trap types, such as structural trap and stratigraphic trap, are developed in the slope belt where the discovered reservoirs are small and the fluids are mainly heavy oil and super-heavy oil. High quality and mature hydrocarbon source rocks are the main controlling factors for oil and gas accumulation. The traps formed in the main orogenic episodes are the most advantageous to capture oil and gas. The high quality reservoirs and faults consist of hydrocarbon migration passage systems. The destruction of tectonism and washing effect cause the formation of the heavy oil reservoirs in the slope belt.

Key words: South America, Andesian movement, foreland basin, reservoir, structural feature

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