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胜利油区东营箕状断陷湖盆南部缓坡带沙河街组主要沉积学特征及地球物理特征为①冲积扇 :由含砾砂岩 ,细粒不等粒 (类 )砂岩、粉砂岩、泥质粉砂岩组成 ,在测井曲线扇根为高幅齿化的箱形和钟形 ,扇中为中幅的分散齿形或钟形特征 ,斜交前积结构 ,扇端为低幅分散的齿形特征 ,为亚平行反射同相轴 ,地震相特征扇根内部反射是一杂乱 短波形 ;②河流相砂体 :由多种粒级的砂岩、砂质砾岩、粉砂岩和灰色及紫红色泥岩等组成 ,测井曲线下部旋回表现为箱形 钟形特征 ,上部旋回为平行于泥岩基线夹指形曲线为特征 ,在地震反射上常表现为槽形充填特征 ,内部为短波状 -杂乱状反射或为中振中连亚平行反射 ;③三角洲砂体 :由含砾砂岩、砂岩、粉砂岩及泥质粉砂岩、泥岩、碳质页岩组成 ,测井曲线上三角洲平原亚相表现为高幅钟形 (底部呈突变接触 ) ,三角洲前缘在自然电位曲线上表现为漏斗型负异常 ,视电阻率曲线上为低幅锯齿状 ,前三角洲亚相为光滑的平直曲线夹小段的微齿状曲线 ;④滨浅湖砂坝砂体 :由灰绿色粉砂岩、细砂岩及少量含砾砂岩组成 ,测井曲线上表现为倒钟形和钟形的组合或指形或圆滑箱形、或锯齿状 ,在地震反射上就表现为亚平行、中振幅、中连续、中频、中丰度 ,平坦的或局部有波状起伏的席状反射结构 ;⑤缓坡远
The main sedimentary characteristics and geophysical characteristics of the Shahejie Formation in the gentle slope belt in the southern part of the Dongying afforestation rift basin in Shengli Oilfield are: (1) alluvial fan consisting of sandstone, siltstone, siltstone, muddy powder Sandstone. In the log curve, the fan-shaped fan-shaped box and bell are highly-toothed teeth. The fan is medium-sized dispersed tooth or bell-shaped features. The characteristics are sub-parallel reflection events and the internal reflection of seismic facies fan-shaped roots is a messy short waveform; ② fluvial sand bodies are composed of sandstone, sandy conglomerate, siltstone, gray and magenta mudstone The lower part of well log shows a bell-shaped box-shaped feature. The upper part is characterized by a finger-shaped curve parallel to the base line of the shale. It is often characterized by a trough-shaped filling feature on the seismic reflection. The internal part is short wave- For the Zhenzhong even parallel sub-reflection; ③ delta sand body: from gravel sandstone, sandstone, siltstone and muddy siltstone, mudstone, carbonaceous shale, the log curve of the delta plain sub-phase showed high amplitude bell Shaped (mutant contacts at the bottom), before the delta Edge in the natural potential curve showed a funnel-shaped negative anomaly, the apparent resistivity curve is low jagged, the former delta subfacies smooth smooth curve small dentate curve; ④ shore shallow sand bar sand body : Consists of gray-green siltstone, fine sandstone and a small amount of pebbly sandstone. Log curves show a bell-shaped or bell-shaped combination or finger-shaped or box-shaped, or jagged, showing sub-seismic Parallel, medium amplitude, medium continuous, medium frequency, medium abundance, flat or partially undulated sheet-like reflective structure; ⑤ gentle slope far