渤海油田JZ31构造东二段湖底扇地震沉积学研究

Seismic sedimentology research on sublacustrine fan of second Member of Dongying Formation in JZ31 Structure of Bohai Oilfield

王志萍 王保全 刘艺萌 郑敬贵 黄晓波

（中海石油（中国）有限公司天津分公司，天津 300452）

(Tianjin Branch of CNOOC Ltd., Tianjin 300452, China)

随着渤海油田勘探程度越来越高，大型复合湖底扇型岩性油气藏逐渐成为勘探突破的重要领域之一，湖底扇沉积展布特征的精细刻画是该类油气藏勘探成功的关键技术。文中以JZ31构造东二段湖底扇为例，在地震沉积学理论指导下，结合湖底扇沉积特点，以等时地层单元为研究基础，平面地震相和剖面地震相相结合，并据此进行属性优选，利用波形分类技术约束湖底扇宏观分布，振幅切片属性反映岩性的横向变化规律，分频倾角切片属性反映水道分布特征。综合运用以上属性，可以精细刻画湖底扇的平面分布和沉积演化规律。该方法能较好地应用于湖底扇研究，具有推广应用价值。

 With the increasing degree of exploration in the Bohai Oilfield, the large complex sublacustrine fan reservoir has become one of the important fields for exploration breakthrough. The precise description of the sedimentary characteristics of sublacustrine fan is the key technique for the successful exploration of such type of oil and gas reservoir. Taking the sublacustrine fan in the JZ31 Structure of Liaozhong Sag as an example, under the guidance of seismic sedimentology theory, based on isochronous stratigraphic units, combined plane with profile seismic facie, the plane distribution and depositional evolution were well described by giving priority to waveform classification to restrain the macro-distribution of sublacustrine fan. Amplitude slice attributes can reflect the lateral variation of lithology, and the frequency decomposition dip slice attributes can reflect the distribution characteristics of the channel. Fusing them together can describe the plane distribution and depositional evolution of the sublacustrine fan. This method can be applied to the study of sublacustrine fan, which has the value of popularization and application.

10.6056/dkyqt201704004