层序地层学教案总结.pptVIP

中国地质大学(武汉)石油系 Deepwater Exploration BP is a world leader in the exploration of Tertiary Deepwater Basins. Our strategy is to be Number One or Number Two in the Basins we choose to explore by being in the “right places” in these Basins. Current activity is focussed on the Gulf of Mexico, the Atlantic margins, Central Asia/Egypt, Indo-China and Russia. We believe the key to success is a sound understanding of the stratigraphic fill, the petroleum system, and the application of geophysical excellence. We will not drill any dry holes. Geophysical Risk Reduction In conjunction with the Basin Analysis, BP utilises inverted seismic data volumes for detailed interpretation in area of lowest common risk as: It removes the wavelet effect It looks more like geology It has more physical meaning and is easier to relate to reservoir and fluid properties Reservoir properties are separated from overburden Stratigraphic interpretation can be improved High Resolution 3D surveys In map form, HR data allow spectacular imaging of depositional systems down to approximately 2.4 seconds below seabed. This degree of resolution is critical to resolve the reservoir uncertainty and minimise the number of wells required for field development BP has additionally developed propriety software to further reduce pre-drill risk in these complex channelised systems. 1、测井曲线的畸变 Faqian6井扩径造成AC增大，需矫正。 Faqian6井扩径造成DEN减小，需矫正。 法2井合成地震记录 法21井合成地震记录 法8井合成地震记录 法9井合成地震记录 法浅12井合成地震记录 法浅2井合成地震记录  IAN D.BRYANT介绍了一种广泛实用的地下界面的物理测定方法——古地磁反转地层法（Palaeomagnetic reversal stratigraphies），这一方法可以在露头和地下储层内识别有意义的沉积间断和控制层序的解释的情况下辅助建立一个年代地层格架。在储层规模上，层序和准层序的边界可有多种方法识别出来，所有这些方法都依赖于通过这些有意义的地层界面的空间的一致性变化。地层水和油气的地球化学资料在通过层序和准层序的边界时可显示一个从最初储层压力衰减后测量到的重大变化；类似地，地层压力剖面通过这些界面时多显示一个明显的不连续面（图9,10）。 虽然现在3D地震资料可以显示一个较高的空间精度，综合利用地震特性参数可以限定储层层序的年代和岩性地层格架。但地震反射样式和古生物学定年所指示的层序边界的年代跨度是1—5Ma，这不能满足储层规模的高分辨率层序地层学的精度分析要求；全球古地磁反转法可以提供的分辨率时间尺度为0.1—0.01Ma，这个方法所提供的分辨率可以达到储层规模的解释精度。 图9 从新西兰的Maui油田不同地区的两口井的对比展示了C1砂岩储层的古地磁带和层序地层解