%0 Journal Article
%T 珠江口盆地恩平凹陷断层封闭性评价<br>Study on the Evaluation Method of Fault Sealing and Its Application: An Example of Neogene Layer in Enping Sag, Pearl River Mouth Basin
%A 许新明
%A 姜建
%A 陈胜红
%A 刘丽华
%A 刘贤来&lt
%A br&gt
%A XU Xin-ming
%A JIANG Jian
%A CHEN Sheng-hong
%A LIU Li-hua
%A LIU Xian-lai
%J 现代地质
%D 2016
%X 摘要： 为了综合评价断层的封闭性，以珠江口盆地恩平凹陷新近系为例，通过实钻断层圈闭油藏的封堵规律研究，标定断裂带泥质含量、泥岩涂抹系数和断面正压力临界值，建立了适合勘探实践的断层封闭性评价的新方法。结果表明：断层油藏与断层涂抹量呈现出泥岩涂抹因子随深度逐渐递增的趋势；断裂带泥质含量与泥岩发育情况是断层能够封堵的先决条件，断层的封闭性受构造图精度、构造调整和控圈断裂断层活动影响。应用该方法能有效评价未钻断层圈闭油气保存条件，有助于提高断层圈闭的勘探成功率，可推广至具有相似构造成因和沉积背景的勘探新区进行断层封闭性分析，是勘探早期评价断层封闭性有效的方法。<br>Abstract: Taking the Neogene layers of the Enping sag as an example, a new way to evaluate fault sealing of structural closure is introduced under the current exploration practice to calibrate critical values, that is, obtaining clay content in fault zone, shale smear value and normal pressure of fault surface from sealing rules of faulted reservoir. The results show that the threshold values of shale smear factor in drilled faulted reservoirs gradually increases with depth. Development of shale and its content of fault zone are prerequisites for fault sealing, and the evaluation of fault sealing is affected by structure map accuracy, structural adjustment and fault activity. The risk of fault sealing, including faults vertical and lateral sealing, could be analyzed by the evaluation method, so as to improve the success ratio of fault traps exploration. And the evaluation method could be applied to the new exploration area with the similar tectonic genesis and sedimentary background as Enping sag, which is an effective methods to evaluate fault sealing during the early exploration periods
%K 珠江口盆地
%K 恩平凹陷
%K 断层封闭
%K 评价体系
%K 新近系
%K Pearl River Mouth Basin
%K Enping sag
%K fault sealing
%K evaluation method
%K Neogene
%U http://www.geoscience.net.cn/CN/abstract/abstract13766.shtml