Fort Worth盆地Barnett页岩气藏的成功开发,极大地推动了全球页岩气勘探开发进程。分析北美地区已开发页岩气聚集区带油气地质特征,了解区域地质背景,有助于建立页岩气富集模式、寻找有效页岩气储层、确定"甜点"边界、提高采...Fort Worth盆地Barnett页岩气藏的成功开发,极大地推动了全球页岩气勘探开发进程。分析北美地区已开发页岩气聚集区带油气地质特征,了解区域地质背景,有助于建立页岩气富集模式、寻找有效页岩气储层、确定"甜点"边界、提高采收率等。研究表明,北美克拉通盆地、前陆盆地侏罗系、泥盆系—密西西比系富集多种成因、多种成熟度页岩气资源,页岩产层通常是含油气系统中主力烃源岩,尤以受上升洋流影响、具有低能还原环境的海进体系域黑色页岩(腐泥型—混合型干酪根)为佳。沉积环境和热成熟度是页岩气富集区带主要控制因素,裂缝网络发育程度决定能否获取丰厚的商业价值。因此,古气候、古地理条件以及沉积环境、构造作用等因素的综合,使得北美页岩气资源形成并不断得到有效开发。展开更多
The growth index of a fault is related not only to its activity rate but also to the deposition rate, especially in seriously truncated area, the growth index is serious distorted. But this situation has been neglecte...The growth index of a fault is related not only to its activity rate but also to the deposition rate, especially in seriously truncated area, the growth index is serious distorted. But this situation has been neglected for a long time. Based on growth index and fault activity rate, the activity intensity of Linnan fault is studied, and it is so considered that the conclusion of latter is right. The speed of activity of a fault can be directly attained from the duration of sedimentation and reflects quantitatively the activity intensity of the fault, thus the terminology of the growth index of fault is practically meaningless. Fault activity was strong during Dongying time, and the buried depth of stratum is shallow, so fault sealing is worse, hydrocarbons migrated to Qianguantun and Qudi areas. This is important to hydrocarbon accumulation. Fault activity intensity was big during Minghuazhen time, which determined the vertical hydrocarbon distribution.展开更多
文摘The growth index of a fault is related not only to its activity rate but also to the deposition rate, especially in seriously truncated area, the growth index is serious distorted. But this situation has been neglected for a long time. Based on growth index and fault activity rate, the activity intensity of Linnan fault is studied, and it is so considered that the conclusion of latter is right. The speed of activity of a fault can be directly attained from the duration of sedimentation and reflects quantitatively the activity intensity of the fault, thus the terminology of the growth index of fault is practically meaningless. Fault activity was strong during Dongying time, and the buried depth of stratum is shallow, so fault sealing is worse, hydrocarbons migrated to Qianguantun and Qudi areas. This is important to hydrocarbon accumulation. Fault activity intensity was big during Minghuazhen time, which determined the vertical hydrocarbon distribution.
