鄂尔多斯盆地镇原—泾川地区断层特征及控油意义
发布时间：2018-09-13 07:08
【摘要】：通过综合解释镇原—泾川地区的钻井和三维地震资料,分析了走滑断层的分布规律、形成期、应力性质及其对长8油藏和高产井的控制作用,得出以下认识:(1)研究区在印支期的NE-SW向挤压作用力下形成了NEE和NNE向"X"型共轭剪切断层,在燕山期的SE向右旋压扭作用力下形成NW向断层,NEE向断层持续活动,NNE向断层活动不明显;(2)走滑断层分为Ⅰ、Ⅱ、Ⅲ等3类,其中Ⅰ类自奥陶系及以下地层断至白垩系及以上地层,平面延伸最长,断开地层最厚,在平面上共发育NW和NEE向两组断裂带,Ⅱ类自三叠系内部断至白垩系及以上地层,在平面上主要呈NE向延伸,Ⅲ类自奥陶系及以下地层断至中、上二叠统,在平面上主要呈NNE向延伸;(3)高产水平井均沿Ⅰ类走滑断层分布,沿Ⅱ、Ⅲ类走滑断层分布的长8砂岩多为水层或含油水层。
[Abstract]:Based on the comprehensive interpretation of drilling and 3D seismic data in Zhenyuan-Jingchuan area, the distribution of strike-slip faults, their forming period, stress properties and their control effects on Chang-8 reservoir and high-yield wells are analyzed. The main conclusions are as follows: (1) in the Indosinian period, the conjugate shearing faults of NEE and NNE direction "X" were formed under the NE-SW compression force in the Indosinian period. In Yanshanian period, the continuous activity of NNE-trending faults is not obvious due to the formation of NW trending faults under the right spinning and torsional forces of Yanshanian period. (2) the strike-slip faults can be classified into three types: 鈪，
本文编号：2240434
[Abstract]:Based on the comprehensive interpretation of drilling and 3D seismic data in Zhenyuan-Jingchuan area, the distribution of strike-slip faults, their forming period, stress properties and their control effects on Chang-8 reservoir and high-yield wells are analyzed. The main conclusions are as follows: (1) in the Indosinian period, the conjugate shearing faults of NEE and NNE direction "X" were formed under the NE-SW compression force in the Indosinian period. In Yanshanian period, the continuous activity of NNE-trending faults is not obvious due to the formation of NW trending faults under the right spinning and torsional forces of Yanshanian period. (2) the strike-slip faults can be classified into three types: 鈪，
本文编号：2240434
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