基于结构张量的走滑断裂破碎带地震识别——以富满油田超深层碳酸盐岩为例
Seismic Identification of Strike-Slip Fault Damage Zones Based on Structure Tensor Analysis:A Case Study of Ultra-Deep Carbonate Rocks in Fuman Oilfield
汪如军 1孙冲 2袁敬一 2刘瑞东 2王轩 2马应龙 2王旭鹏3
作者信息
- 1. 中国石油 塔里木油田分公司,新疆 库尔勒 841000;中国石油天然气集团有限公司 超深层复杂油气藏勘探开发技术研发中心,新疆 库尔勒 841000;新疆维吾尔自治区超深层复杂油气藏勘探开发工程研究中心,新疆 库尔勒 841000
- 2. 中国石油天然气集团有限公司 超深层复杂油气藏勘探开发技术研发中心,新疆 库尔勒 841000;新疆维吾尔自治区超深层复杂油气藏勘探开发工程研究中心,新疆 库尔勒 841000;中国石油塔里木油田分公司 勘探开发研究院,新疆 库尔勒 841000
- 3. 西南石油大学 地球科学与技术学院,成都 610500
- 折叠
摘要
塔里木盆地超深层奥陶系碳酸盐岩走滑断裂破碎带发现了丰富的油气资源,但由于超深层地震资料分辨率低,难以精准刻画走滑断裂破碎带,制约了走滑断控油气藏的高效评价与目标优选.根据富满油田走滑断裂破碎带的地震响应特征,在构造导向滤波基础上,利用结构张量方法计算特征值和特征向量,通过时窗选取与纵向厚度叠加加强反映沿断裂方向的投影能量,突出走滑断裂破碎带,刻画其边界与强度.结果表明:该方法更清晰地刻画了走滑断裂的分布,可以识别更小规模的走滑断裂;实现了超深层碳酸盐岩走滑断裂破碎带宽度与强度的刻画,可以用来评价走滑断裂破碎带的发育程度;将该方法应用于圈闭评价、井位部署、井轨迹设计、钻井监测等,大幅提高了钻探成功率与单井油气产量.
Abstract
Abundant hydrocarbon resources have been discovered in the ultra-deep Ordovician carbonate strike-slip fault damage zones of the Tarim basin.However,these zones cannot be accurately characterized due to the low resolution of seismic data obtained from the ultra-deep layers,thereby restricting the efficient evaluation and target selection of the strike-slip fault-controlled hydrocarbon reservoirs.Ac-cording to the seismic responses of the strike-slip fault damage zones in the Fuman oilfield,and based on the structure-oriented filtering,the eigenvalues and eigenvectors were calculated by using the structure tensor method,and the projection energy along the fault direction was enhanced by selecting appropriate time windows and stacking vertical thicknesses,which accentuates the strike-slip fault damage zones,enabling a clearer delineation of their boundaries and intensities.The results show that this method provides a clearer depiction of strike-slip fault distribution,allows for the identification of smaller-scale faults,and effectively delineates the width and intensity of ultra-deep carbonate strike-slip fault damage zones,which can be used to evaluate the development degree of the strike-slip fault damage zones.This method can be employed in trap evaluation,well placement,trajectory design,and well monitoring,which will improve drilling success rates and individual well productivity.
关键词
塔里木盆地/富满油田/超深层/碳酸盐岩/走滑断裂/破碎带/结构张量Key words
Tarim basin/Fuman oilfield/ultra-deep stratum/carbonate rock/strike-slip fault/damage zone/structure tensor引用本文复制引用
出版年
2024
NETL
NSTL
万方数据