FEATURES OF STRUCTURAL SYSTEMS IN NORTHERN CHINA AND ITS CONTROL ON BASIN AND HYDROCARBON DISTRIBUTION
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摘要:
在应用地质力学方法系统划分中国北方地区含油气盆地构造体系的基础上,开展构造体系控盆、控油气源区、控油气聚集带、地应力控制油气、低次序扭动构造控制油气田研究。研究结果表明,中国北方地区主要发育新华夏系、西域系、纬向系、祁吕贺兰山字型等构造体系,控制了塔里木盆地、鄂尔多斯盆地、松辽盆地等大型含油气盆地的成生发展。构造体系具有六个特征:阶段性、迁移性、继承性、差异性、转换性和复杂性。构造体系在多个方面控制油气分布,包括构造体系多级控制油气、构造体系叠加控制油气、构造体系复合联合控制油气、构造体系多期控制油气、低序次扭动构造控制油气田分布等。以构造体系控油为主线,综合考虑油气成藏条件,指出了油气聚集有利区。在优选的有利区中相继获得了新的油气重大突破和发现,证实构造体系控油研究及油气聚集有利区预测的科学性、准确性。这些有利区也是今后较长时期内油气勘探的主要目标。
Abstract:Basins, source rock, hydrocarbon accumulation areas controlled by structural systems, hydrocarbon accumulation controlled by stresses, oilfields controlled by subordinate shear structural systems are researched based on structural system theory. The results show that northern China are dominated by Neocathaysian, Western Regions, Latitudinal, Qi-Lyu-He epsilon-type and some other structural systems with stage, migration, inheritance, discrepancy, transition, and complexity features, which controls the generation and development of the Tarim basin, Ordos basin and Songliao basin. The rules of petroliferous basins and hydrocarbon distribution controlled by structural systems are explained, including multi-order, superimposition, conjunction and multi-stage control of structural systems and the control of subordinate shear structural system. The favorable areas for hydrocarbon accumulation are pointed out by taking the structural system theory as the basis and considering the conditions of hydrocarbon accumulation comprehensively. Major breakthroughs and discoveries have been made in the selected favorable areas, which proves the scientificalness and accuracy of the study on the structural system control over oil and the prediction of favorable areas for hydrocarbon accumulation. These favorable areas are also the main targets for hydrocarbon exploration in the long term.
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Key words:
- northern China /
- structural system /
- Tarim /
- Ordos /
- Songliao /
- basin-control /
- oil-control
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表 1 中国北方地区主要构造体系与含油气盆地关系表
Table 1. Relationship between petroliferous basins and structure system in northern China
纬向系 西域系 华夏系 新华夏系 经向系 反S型 山字型 塔里木 √ √ √ 鄂尔多斯 √ √ √ √ √ 松辽 √ √ √ 表 2 中国北方地区主要盆地内构造体系控油作用表
Table 2. Structural systems in northern China controlling on hydrocarbon
盆地 一级油气源区(坳陷) 一级油气富集带(隆起和斜坡) 塔里木 库车坳陷(EW)、阿—满坳陷(NW)、喀什—叶城坳陷(NW、反S、EW)、且末断陷(反S) 库车前陆断褶带—沙雅隆起(EW)、巴楚隆起—卡塔克隆起(NW)、古城墟(NE)、麦盖提斜坡(NW)、孔雀河斜坡(NW) 鄂尔多斯 伊陕斜坡—天环坳陷(SN)、渭河坳陷(EW) 伊陕斜坡(SN)、西缘逆冲带(SN)、渭北隆起(EW) 松辽 中央坳陷(NNE) 大庆长垣及西部斜坡(NNE) -
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