断层封堵性分析及SGR方法在东海勘探区应用

Fault sealing property analysis and a shale gouge ratio method applied to an exploration area in the East China Sea

断层构造圈闭是目前近海油气勘探的重点区域,定量评价断层的封堵性有助于提高勘探成功率。对当今国内外断层封堵分析方法与技术发展进行了介绍和评述,泥岩断层泥比(SGR)方法在断层封堵的风险评价中最为常用和有效。应用SGR方法,分析了东海某构造区的断层封堵性并进行了烃柱高度的定量计算。分析结果与实际钻探一致,表明利用SGR估算封烃高度适用,对油气勘探具有指导意义。

Faulted structural traps are a key focus of current offshore oil and gas exploration, and a quantitative evaluation of fault sealing properties helps to improve the success rate of exploration. This paper introduces and reviews the fault block analysis method and the technology used in both China and internationally. The shale gouge ratio (SGR) method is the most commonly used and effective method for assessing the probability of fault sealing. This study analyzes fault sealing properties and makes a quantitative calculation of hydrocarbon column height using the SGR method for a tectonic zone in the East China Sea. The results of the analysis are consistent with data obtained from actual dril ing, and show that the SGR estimation of sealing hydrocarbon height has signiifcant applicability to oil and gas exploration.