通过现代OBN采集解决里海南部复杂构造的处理和成像挑战

Xiaolin Lyu, Xinlei Hu, Wei Wang, M. Khdhaouria, Lamia Rouis, Aldrin Rondon, G. Ameish, Qunli Qi, Mingqiu Zhao
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摘要

由Dragon Oil开发的大切列肯地区(GCA)位于一个复杂的西北-东南右跨流带,将北部和南部里海盆地(SCB)分开。在上新世—更新世不同类型的高断裂花状构造中发现了大量油气聚集。通过多次现场调查,发现该地区浅层天然气分布广泛,在地震成像上形成了慢速、高吸收的暗区。这对地震处理和成像提出了很大的挑战。2022年,开展了OBN地震活动,旨在解决遗留数据集中存在的成像问题。OBN三维地震勘探的主要目标是:在1500-4700m深度的碎屑储层中,对构造、断层和裂缝特征、地层学、岩石物理性质、气柱和云缓解以及流体接触进行适当成像。地震采集的实施是成功的,在预定的预算范围内按时提供高质量的数据,使所有相关方和利益相关者都非常满意。对HSSE标准的坚定承诺,作为一个完整的团队,与所有团队成员之间的充分合作和持续密切的沟通是成功的主要因素之一。在撰写本文时,正在制作快速跟踪3D数据立方体。3D地震数据处理和解释的初步结果非常令人鼓舞,与传统的3D地震数据集相比,有了明显的改进。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Solving Processing and Imaging Challenges in a Southern Caspian Sea Complex Structure through Modern OBN Acquisition
The Greater Cheleken Area (GCA) developed by Dragon Oil, situates on a complex NW-SE dextral transcurrent zone which separates the Northern from the Southern Caspian Basin (SCB). Numerous hydrocarbon accumulations were discovered in highly faulted Pliocene-Pleistocene flower structures of different types. Shallow gas has been identified vastly distributed in this region via numerous site surveys, that creating slow-velocity and high-absorption dimming zone on the seismic imaging. It poses great challenges on seismic processing and imaging. In 2022, an OBN seismic campaign was carried out aiming to resolve the imaging problems that exist in a legacy dataset. The main objectives for the 3D OBN seismic survey are: proper imaging of structures, faults and fractures characterization, stratigraphy, petrophysical properties, Gas columns and clouds mitigation and fluid contacts in clastic reservoirs cited between1500-4700m depth. The implementation of the seismic acquisition is successful by delivering high quality data on schedule and within the predetermined budget at the full satisfaction of all involved parties and stakeholders. Strong commitment to HSSE Standards and working as an integrated One-Team with full collaboration and a continuous and close communication between all the Team members are among the main Success Factors. A fast track 3D data cube is being produced at the time of writing this manuscript. The preliminary results of the 3D seismic data processing and interpretation are very encouraging and showing a clear improvement compared to the legacy 3D seismic data set.
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