| 分流河道特征及其识别方法：以东营凹陷东部地区为例 |
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| 引用本文： | 于建国,林春明,杨云岭,朱应科,王金铎,赵彦彦.分流河道特征及其识别方法：以东营凹陷东部地区为例[J].高校地质学报,2002,8(2):152-159. |
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| 作者姓名： | 于建国 林春明 杨云岭 朱应科 王金铎 赵彦彦 |
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| 作者单位： | 1. 南京大学 地球科学系， 南京210093； 2. 胜利油田有限公司，东营 257000；3. 胜利油田 物探研究院， 东营 257062 |
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| 摘 要： | 东营凹陷东部地区分流河道沉积物以砂岩，粉砂岩为主，夹泥岩薄层，分选性较好，砂岩层理发育，横剖面上分流河道顶平底凸的透镜状，在平面上呈树枝形的扇状分布，分流河道的储集体主要有心滩和边滩交错叠置构成，厚度一般为2－10m，分流河道储集体的测井相特征在自然电位曲线上反映明显，可以划分为光滑柱状，齿形柱状，齿形漏斗状－齿形钟状和光滑卵状，分别代表河道中心，中心偏边部，接近边部及河道边部，分流河道储集体在地震反射外形呈透镜状，地震反射连续性差，中振幅，上超充填特征明显。
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| 关 键 词： | 分流河道 沉积特征 三维地震相干技术 东营凹陷 |
| 文章编号： | 1006-7493(2002)02-152-08 |
| 修稿时间： | 2002年1月3日 |
Features of Distributary Channels and Their Diagnosis Methods:Exemplified by the Eastern Dongying Depression |
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| YU Jian guo ,LIN Chun ming ,YANG Yun ling ZHU Ying ke ,WANG Jin duo ,ZHAO Yan yan.Features of Distributary Channels and Their Diagnosis Methods:Exemplified by the Eastern Dongying Depression[J].Geological Journal of China Universities,2002,8(2):152-159. |
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| Authors: | YU Jian guo LIN Chun ming YANG Yun ling ZHU Ying ke WANG Jin duo ZHAO Yan yan |
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| Institution: | 1. Dept. of Earth Sciences, Nanjing University, Nanjing 210093; 2. Shengli Oil-field Ltd. Coop., Dongying 257000, Shandong, China; 3. Geophysical Research Institute, Shengli Oil-field, Dongying 257062, Shandong, China |
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| Abstract: | With the further exploration，the research on sedimentary facies of distributary channels becomes more and more important. The reservoirs of distributary-channels are of a special hydroearbon pool type．Due to their intense concealment and unique rotating conditions，the study on such reservoirs is very difficult．In this article，we made systematic research on the distributary-channel reservoirs for the second member of Shahejie Formation，eastern Dongying Depression，from the following aspects：sedimentation characteristies ，reservoir characteristies, the 1ogging characteristics，and 3D-seismic coherence analysis．Our study suggests that the sediments of distributary-channels in the eastern Dongying Depression are mainly composed of sand and silt with small amount of mud flasers．The sand and silt are usually wel1 sorted and rounded，and often contain large-scale tabular or trough cross-beddings，parallel 1aminations and masive beddings etc．The distributary-channels are lenticular，with flat-top and convex-bottom in their cross-sections．On the plan, they are fan-shaped with dipping limbs. During low lake level stages, the deposits of distributary-channels move lakeward；and during high lake level stages，hasinward. Such fluctuation of Lake level often leads to formation of distributary-charnnels’sediments largely under subaquatic condition．These reservoirs are mainly composed of cross-stratified diaras and pointbars, with monolayers ranging from 2m to 10m．The spontaneous potential(SP)curves well indlcating the logging characteristics consist of smoothing column，dentate column，dentate funnelshaped，dentate pendulum and smoothing ovum which represent five different positions of distributary-channels from the center to the margin respectively. Their seismic profiles are lenticular or hummocky，with poor continuity，middle-amplitude and oulapping-filling features．Compared with others，these reservoirs in distributary-channels are widespread，complex and thin in vertial direction for their swift wandering. Therefore，we should analyze the data in geology，1ogging，drilling and 3D-seismic materials integratedly to prognose the configuration and distribution of the distributary-channels．The discusion about the recognition methods of distributary-channels in eastern Dongying Depression in this paper is of significance for exploration and development of the subtle reservoirs. |
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| Keywords: | distributary channels sedimentary characteristics 3D seismic coherence analysis Dongying Depression |
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