SBIR Phase I: Enhanced 3-D Seismic Imaging of Subsalt Gas and Oil Reservoirs Using Primary and Coverted Waves

SBIR 第一阶段：使用主波和隐伏波对盐下天然气和油藏进行增强型 3D 地震成像

• 批准号: 9860053
• 负责人: Dimitri Bevc
• 金额: $ 10万
• 依托单位: 3DGEO DEVELOPMENT INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 1999-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9860053&HistoricalAwards=false
• 关键词: SBIR; Phase; Enhanced; Seismic; Imaging

9860053 This Small Business Innovation Research (SBIR) Phase I project will explore improved imaging of subsalt oil and gas reservoirs by incorporating converted wave energy into the seismic migration process. It is difficult to obtain high-quality earth images - necessary in contemporary reservoir development and exploration - in complex subsalt geologic structures. In such regions, conventional seismic technology, using compressional wave data without accounting for converted waves, may incorrectly position geological features, or otherwise not image them at all. 3-D seismic imaging is dependent on successful parameterization of the wave propagation phenomena with asymptotic Green's functions generated by ray tracing or finite-difference traveltime calculation. To determine the feasibility of imaging with converted waves, a petrophysical analysis of subsalt reservoir environments will be coupled with realistic elastic synthetic modeling of seismic wave propagation. The synthetic data will be compared to the results of elastic ray tracing to determine how the elastic ray tracing can effectively parameterize the important converted wave propagation effects. Phase II would involve development of a converted wave imaging algorithm seamlessly integrated with a standard imaging algorithm, so that the more expensive converted wave imaging calculations need only be carried out in small target areas. Subsalt oil and gas reserves in the Gulf of Mexico are costly to produce and therefore require sophisticated and detailed 3-D seismic imaging. This seismic imaging technology is expected to be applied to exploration and reservoir development in geological environments of this kind.

9860053 这个小型企业创新研究（SBIR）第一阶段项目将探索通过将转换波能量纳入地震迁移过程来改善盐下油气藏的成像。 在复杂的盐下地质构造中，难以获得当代油藏开发和勘探所必需的高质量地球图像。 在这样的区域中，使用压缩波数据而不考虑转换波的常规地震技术可能不正确地定位地质特征，或者根本不对它们成像。 3-D地震成像依赖于用射线追踪或有限差分走时计算产生的渐近绿色函数成功地参数化波传播现象。 为了确定转换波成像的可行性，盐下储层环境的岩石物理分析将与地震波传播的真实弹性合成建模相结合。 将合成数据与弹性射线追踪的结果进行比较，以确定弹性射线追踪如何有效地参数化重要的转换波传播效应。 第二阶段将涉及开发与标准成像算法无缝集成的转换波成像算法，以便仅需要在小目标区域中进行更昂贵的转换波成像计算。 墨西哥湾的盐下石油和天然气储量的开采成本很高，因此需要复杂而详细的三维地震成像。 这种地震成像技术有望应用于此类地质环境下的勘探和油气藏开发。