琼东南盆地深水区断裂对沉积充填的控制作用

发布时间：2019-04-29 12:29

【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。
[Abstract]:Under the guidance of sedimentology and structural geology, a detailed study on the synsedimentary faults and filling of Lingshui formation is carried out by using the new 3-D seismic data collected in Baonan fault-stage zone, combining with the fault activity rate and fault palaeo-fall method. The results show that the large-scale submarine fan depositional system is mainly developed in Lingshui formation of Baonan fault-step belt, and the main synsedimentary faults controlling the formation deposition of Lingshui formation are (8) boundary fault and F1, F2, F3 faults. This group of faults show obvious segmentation in space, in which (8) fault has strong activity and weak alternation, which is a multi-point supply-source fault; The F _ 1, F _ 2 and F _ 3 faults form several lateral uplift adjustment zones and strike slope regulation zones, which are the dominant migration paths of sediments. According to the characteristics of fault sand control, the convergence type multi-stage fault sand control model of Baonan fault step belt is put forward, and the three favorable areas of F _ 1 fault slope break zone, F _ 2, F _ 3 fault intersection, F _ 1 and F _ 2 faults east of Baonan fault step belt are predicted. This study is of great significance to guide the drilling deployment in the new deep water area of Qiongnan Basin.
【作者单位】：中海石油(中国)有限公司湛江分公司;
【基金】：国家科技重大专项“海洋深水区油气勘探关键技术”(2016ZX05026)
【分类号】：P618.13

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