综合地球物理方法预测滨南地区沙三段浊积砂体储层
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李野,男,在读硕士研究生,从事沉积学以及地球物理方面的研究。联系电话:18650876825,E-mail:billyliye1988@163.com。

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国家自然科学基金“济阳坳陷区Mz/Pz不整合面揭示的地形演化过程研究”(40902033),构造与油气资源教育部重点实验室开放基金(TPR-2010-24)。


Integrated geophysics research on distribution of turbidite sand body in E2s3, Binnan oilfield
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    摘要:

    滨南地区沙三段浊积砂体储层地震资料品质差、储层相变快,为降低井位部署失利风险,依据精确层序地层格架—地震响应特征分析—地层切片结合优势属性预测砂体横向展布—频谱分解和测井约束反演预测砂体纵向叠置的技术流程,精确描述浊积砂体储层分布。研究区沙三段分为3个三级层序,沙三段中、下亚段为浊积砂体储层发育的主要层段。通过90°相位转换以及地层切片并结合瞬时振幅属性对浊积砂体储层有利发育部位进行预测。结果显示,浊积砂体储层主要发育在滨县凸起东南部以及靠近凸起的部位;将原始数据体用S变换分解为25,30,35,40和45 Hz共5个单频率体,对比显示40 Hz单频率体能较好地显示浊积砂体储层发育情况;随后进行测井约束反演处理,将处理结果与40 Hz分频数据结合得到砂体叠置特征,预测研究区浊积砂体储层主要发育在滨县凸起的东部以及南部区域。

    Abstract:

    The E2s3 formation of Binnan oilfield is developed in basin rift epoch. Because of the adequate sediments, many kinds of turbidite sediment reservoirs are developed. However, due to the restriction of seismic data’s quality and facies change, great progress has not been made in the exploration of turbidite reservoirs in Binnan oilfield. This paper aims at practical problems of turbidite reservoirs identification and introduces a workflow: establishing sequence framework-analyzing seismic response characteristics (amplitude, continuity etc.)-attribute analysis with strata slice-spectral decomposition-log-constrained seismic inversion, and the issues above are perfectly solved. According to the seismic response, log and drilling characteristics, this paper divides the E2s3 formation into three sequences, and the turbite reservoirs is mainly developed in mid E2s3 & lower E2s3; the favorable turbidite reservoirs development sites are anticipated by using 90° phase rotation, strata slice and instantaneous amplitude technology, the result shows that the turbidite reservoirs is mainly developed in southeast and the neighboring areas of Binxian prominence; by application of S-Transformation, the initial seismic data is decomposed into 25, 30, 35, 40 and 45 Hz single-frequency data-bodies, among which, the 40 Hz single-frequency data-body shows a better resolving ability of turbidite reservoirs; and then, in combination with the log-constrained seismic inversion and 40 Hz single-frequency data-body, the vertical overlap features of turbidite sandbodies are clear, and favorable development sites of turbidite reservoirs are proposed.

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李野,郑德顺,汤婕.综合地球物理方法预测滨南地区沙三段浊积砂体储层[J].油气地质与采收率,2013,20(6):46~50

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  • 在线发布日期: 2015-09-02