基于三维地震属性的天然气水合物解释:以墨西哥湾为例

Q2 Earth and Planetary Sciences

Leading Edge Pub Date : 2023-03-01 DOI:10.1190/tle42030216.1

N. Nenov, V. Machado, S. Sukmono, Eriwaldo Teixeira

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引用次数: 0

摘要

天然气水合物是公认的钻井地质灾害。如果不加以缓解，可能会导致防喷器堵塞、气涌、井喷、井眼不稳定、套管外气体泄漏和固井作业不足。位于天然气水合物稳定带（GHSZ）内的天然气水合物很难仅从地震振幅进行解释。在本文中，我们将速度上拉法与地震属性的三维可视化相结合的多方面方法应用于GHSZ内天然气水合物的解释。该方法适用于墨西哥湾东部水深超过2400米的地区。本研究的实际结果是，在天然气水合物被解释为存在的地区之外，选择了安全的钻井位置。

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Gas-hydrate interpretation from 3D seismic attributes: An example from the Gulf of Mexico

Gas hydrates are a recognized drilling geohazard. If not mitigated, they may result in plugged blowout preventors, gas kicks, blowouts, borehole instability, gas leaks outside casings, and inadequate cementing operations. Gas hydrates located within the gas-hydrate stability zone (GHSZ) are difficult to interpret solely from seismic amplitudes. In this paper, we apply a multifaceted approach using the velocity pullup method in combination with 3D visualization of seismic attributes for the interpretation of gas hydrates within the GHSZ. The approach is applied to an area in the eastern part of the Gulf of Mexico in water depths greater than 2400 m. The practical outcome of this study is the choice of safe drilling locations outside of areas where gas hydrates have been interpreted to be present.

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来源期刊

Leading Edge Earth and Planetary Sciences-Geology

CiteScore

3.10

自引率

0.00%

发文量

180

期刊介绍： THE LEADING EDGE complements GEOPHYSICS, SEG"s peer-reviewed publication long unrivalled as the world"s most respected vehicle for dissemination of developments in exploration and development geophysics. TLE is a gateway publication, introducing new geophysical theory, instrumentation, and established practices to scientists in a wide range of geoscience disciplines. Most material is presented in a semitechnical manner that minimizes mathematical theory and emphasizes practical applications. TLE also serves as SEG"s publication venue for official society business.