结合地震属性和岩石物理特征圈定埃及尼罗河三角洲Disouq油田上新世储层

IF 0.7 Q4 GEOCHEMISTRY & GEOPHYSICS
Ahmed HESHAM, Nadia Abdel FATTAH, Aia DAHROUG
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引用次数: 0

摘要

尼罗河三角洲被认为是北非天然气最丰富的省份。几十年来,天然气勘探和生产一直是尼罗河三角洲的主要目标。结合岩石物理分析、地震解释和地震属性,可以表明埃及尼罗河三角洲Disouq油田存在天然气。测井资料显示,储层可划分为A、B、C 3个区,具有低伽马(约35%)、较高孔隙度(约29%)、低含水饱和度(36-38%)的特征。进行了构造和地层解释,以调查储层的扩展和几何形状,以及影响研究区的断层。储层为一条上新世河道,以低阻抗含气砂岩为特征。近、远偏移数据显示了气体效应。负振幅从近偏移量到远偏移量逐渐增大。振幅图与构造等值线匹配良好,一致性较好。地震属性,包括表面属性和“红绿蓝/颜色混合”,有助于圈定储层的范围和几何形状,以及可能的远景。最后,对研究区原生天然气储量进行了估算,表明研究区具有巨大的经济价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Integrating seismic attributes and rock physics for delineating Pliocene reservoir in Disouq field, Nile Delta, Egypt
The Nile Delta is known as the most prolific gas province in North Africa. Gas exploration and production were the main targets over decades in the Nile Delta. The integration of petrophysical analysis, seismic interpretation, and seismic attributes could indicate the presence of gas in Disouq field, which is located in Nile Delta, Egypt. Well log data showed that the reservoir is classified into three zones (A, B, and C). These zones are characterized by low gamma ray (around 35%), with relatively high porosity (around 29%) and low water saturation (36–38%). Structural and stratigraphic interpretation was conducted in order to investigate the extension and geometry of the reservoir, in addition to the faults affecting the study area. The reservoir is represented by a channel of Pliocene age, characterized by the low impedance sand saturated by gas. Near and far offset data show the gas effect. There is an increase of the negative amplitude from near to far offset. The amplitude map and structural contours match well and show good conformance. Seismic attributes including surface attributes and “Red Green Blue/colour blending” help in delineating the extent and geometry of the reservoir, in addition to the possible prospect. Finally, the volume of original gas in place was estimated what showed that the study area is of great economic interest.
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来源期刊
Contributions to Geophysics and Geodesy
Contributions to Geophysics and Geodesy GEOCHEMISTRY & GEOPHYSICS-
CiteScore
1.20
自引率
14.30%
发文量
0
审稿时长
20 weeks
期刊介绍: CGG publishes original research papers, short and rapid communications and review articles covering a wide spectrum of earth science disciplines including deep structural geophysics, geodynamics, tectonics, near surface geophysics, applied and environmental geophysics, geomagnetism, seismology, paleomagnetism, space weather, geodesy and geomatics, surveying engineering, hydrology, hydro-geology, atmospheric science, climatology.
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