摘要
渤海地区新近系断裂体系复杂,受多期次构造运动影响,使得渤海油田的构造非常的破碎。在秦皇岛28构造的勘探评价过程中,发现局部地区断裂在平面呈现羽状分布,且存在掉向相反断裂带,这种特征是走滑断裂的依据之一,但仅依靠地质理论来确定是否存在走滑断裂是不客观的,需利用地震属性验证其客观存在性。在评价的过程中通过不同技术的组合应用及对比分析,发现常规的边缘检测、相干属性等技术很难对该区复杂断层进行有效识别。基于倾角中值滤波技术去除部分噪音的干扰,凸显断裂信息,应用最大似然属性技术识别出了较为清晰的'隐性走滑'断裂,结合平面特征,进一步落实构造,直接新增资源量约300万t。为扩大秦皇岛28油田的储量规模奠定了坚实的基础。在现今精细勘探阶段,推广应用微断裂识别技术,将会进一步提高复杂断块区断层系统解释的可靠性和精细程度,提高油田滚动勘探开发的钻探成功率。
The Neogene fault system in the Bohai area is complex and affected by multi-stage tectonic movements,which makes the structure of the Bohai oilfield very fractured.During the exploration and evaluation process of Qinhuangdao 28 structure,it was found that the fractures in the local area showed a plume distribution in the plane,and there was a falling fault zone.This feature is one of the basis of strike-slip fault,but it is not objective to rely solely on geological theory to determine whether there is a strike-slip fault.It is necessary to use seismic attributes to verify its objective existence.In the process of evaluation,through the combined application and comparative analysis of different technologies,it is found that conventional edge detection,coherence attributes and other techniques are difficult to effectively identify complex faults in this area.In this paper,the median filtering algorithm is used to remove some noise interference,highlight the fracture information,and use the maximum likelihood attribute technique to identify a clear'hidden strike-slip'fracture.Based on the plane features and further analysis of the fault structure,the resources amount increases by about 3 million tons.It has laid a solid foundation for expanding the reserves of Qinhuangdao 28 Oilfield.In the current fine exploration stage,the application of micro-fracture identification technology will further improve the reliability and fineness of fault system interpretation in complex fault block areas,and improve the drilling success rate of oilfield rolling exploration and development.
作者
于娅
边立恩
王国强
王军
张京思
YU Ya;BIAN Lien;WANG Guoqiang;WANG Jun;ZHANG Jingsi(Tianjin Branch of CNOOC Ltd.,Tianjin 300452,China)
出处
《海洋地质前沿》
CSCD
2019年第8期67-72,共6页
Marine Geology Frontiers
基金
“十三五”国家科技重大专项课题“渤海海域勘探新领域及关键技术研究”(2016ZX05024-003)
关键词
倾角中值滤波
最大似然属性
隐性走滑断层
秦皇岛28油田
inclination median filtering
maximum likelihood attribute
recessive strike-slip fault
Qinhuangdao 28Oilfield
