综合应用波形分析及地震特征反演技术预测滩坝砂岩——以博兴洼陷梁108地区为例

Comprehensive application of technology with wave form analysis and seismic characteristic inversion to beach bar sandstones prediction-taking the area of Liang 108 in Boxing subsag as an example.

滩坝砂岩是东营凹陷南部缓坡带重要的储集体类型。针对其单层薄,横向变化快,并与泥岩、灰岩呈互层的特点,研究了滩坝砂岩岩性组合及其地震反射特征,将博兴洼陷梁108地区沙四段上亚段I砂组岩性组合划分为三种类型,并将其相应的合成道波形和井旁道波形进行分类,利用波形分析技术和地震特征反演技术预测有利岩性组合的滩坝砂岩的分布范围。

Beach bar sandstones are the important reservoir type in the south gentle slope belt of Dongying sag. According to the characteristics of thin single interval, rapid lateral changing and interbedding with mudstone and limestone of the sandstones, lithological association and its characteristic of seismic wave reflection of the beach bar sandstones were researched. The lithological association of sand group I of Es4 in the area of Liang 108 of Boxing subsag was divided into three types, and their corresponding waveforms of synthetic trace and side borehole were classified. Distribution range of the beach bar sandstones favorable to the lithological association was predicted by the technology of wave form analysis and seismic characteristic inversion.