琼东南盆地深水区断裂对沉积充填的控制作用  

Controlling Effect of Faulting on Sedimentary Fill in the Deep Water Areas,the Qiongdongnan Basin

作　　者：周杰 杨希冰 甘军 吴昊 张焱 Zhou Jie Yang Xibing Gan Jun Wu Hao Zhan Yan(CNOOC China Limited Zhanjiang Branch, Zhanjiang , Guangdong 524057, China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057

出　　处：《特种油气藏》2017年第2期75-79,共5页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"海洋深水区油气勘探关键技术"(2016ZX05026)

摘　　要：以沉积学、构造地质学为指导,利用宝南断阶带新采集的三维地震资料,结合断层活动速率及断层古落差法,对陵水组同沉积断裂和沉积充填进行了精细研究。研究表明:宝南断阶带陵水组沉积时期主要发育大型海底扇沉积体系,控制陵水组地层沉积的主要同沉积断裂为(8)号边界断裂及F1、F2、F3断裂。该组断裂在空间上显示出明显的分段性,其中(8)号断裂活动强、弱交替出现,为多点供源型断裂;F1、F2、F3断裂形成多个横向凸起调节带和走向斜坡调节带,这些调节带为沉积物的优势运移路径。根据断裂控砂特征提出了宝南断阶带汇聚型多级断阶控砂模式;预测了宝南断阶带陵三段F1断裂坡折带中部,F2、F3断裂交汇处,F1、F2断裂东部3个有利区。该研究对指导琼东南盆地深水区新区钻井部署有重要意义。Based on the 3D seismic data newly acquired in Baonan fauhed terrace zone, synsedimentary faulting and sedimentary fill of Lingshui Formation were investigated precisely according to sedimentology and structural geology, combined with fault activity velocity and paleo-fall of fault method. It is indicated that during the sedimentation of Lingshui Formation in Baonan faulted terrace zone, the sedimentary system of large submarine fan was mainly devel- oped , and the synsedimentary faulting that controls the sedimentation of Lingshui Formation includes dominantly No.8 boundary faulting, and F1, F2 and F3 faulting. This set of faulting is spatially characterized by obvious seg- mentation. No.8 faulting is a multi-point source supply faulting and its activity is strong and weak alternatively. Un- der the effect of F1, F2 and F3 faulting, many lateral salience accommodation zones and strike slope accommoda- tion zones are formed and they act as the dominant migration paths of sediments. According to the characteristics of faulting controlling sandbody, the convergent multistep faulted terrace controlling sandbody model was proposed for Baonan faulted terrace zone. It was predicted that there were three favorable areas in Ling 3 Member of Baonan faul- ted terrace zone, including the middle area of slope breaking belt in F1 faulting, the convergent area of F2 and F3 faulting, and the eastern area of F1 and F2 faulting. The research results are of great significance to the well drilling arrangement in the new deep water areas in the Qiongdongnan Basin.

关 键 词：深水区 断裂 沉积充填 宝南断阶带 琼东南盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]