渤海海域走滑-伸展断块区断层侧封能力定量评价:以辽东湾坳陷旅大A区为例  

Quantitative evaluation of fault lateral sealing capacity in strike-slip-extension fault block area of Bohai Sea

作　　者：李虹霖 杨传超 张明升 田德瑞 张江涛 LI Honglin;YANG Chuanchao;ZHANG Mingsheng;TIAN Derui;ZHANG Jiangtao(Tianjin Branch of CNOOC(China)Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《海洋地质前沿》2022年第8期47-54,共8页Marine Geology Frontiers

基　　金：“十三五”国家科技重大专项“渤海辽东湾地区潜在富烃凹陷成藏研究与有利勘探方向预测”(2016ZX05024-002-006)。

摘　　要：渤海海域受郯庐走滑断裂带控制,发育独特的走滑-伸展复合断裂体系,形成了大量的复杂断块圈闭,传统方法难以定量评价断层的真实侧封能力。为此,以辽东湾坳陷旅大A区为例,在测井识别断层破碎带基础上,利用声波时差法判断断层力学性质,提出应力系数λ定量修正断层性质对侧封能力的影响,最终利用一种简化后的断-储排替压差法定量评价断层真实侧封能力,对断块油柱高度进行定量预测。Controlled by the Tanlu strike-slip fault zone,a unique strike-slip and extensional composite fault sys-tem is developed in the Bohai Sea area,from which a large number of complex fault block traps was formed.At present,it is difficult to quantitatively evaluate the true lateral sealing ability of faults by traditional methods.The mechanical properties of the faults are so complex that the capacity of side sealing is difficult to be quantitatively evaluated.Therefore,using the Lvda A area of Liaodong Bay depression as an example,on the basis of logging identification of fault fracture zone,interval transit time was used to judge fault mechanical properties.The stress coefficientλwas proposed to quantitatively correct the influence of fault properties on lateral sealing ability.Fi-nally,a simplified fault-reservoir displacement pressure difference method was used to quantitatively evaluate the true lateral sealing ability of fault blocks,and to quantitatively predict the height of oil column of fault blocks.

关 键 词：断层侧封 断层力学性质 断-储排替压力差 走滑-伸展 渤海海域 

分 类 号：P744.4[天文地球—海洋科学]