| 基于沉积过程的三角洲前缘薄互层储层精细分析 |
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| 引用本文： | 李冰,申春生,李林,张君博,胡治华.基于沉积过程的三角洲前缘薄互层储层精细分析[J].沉积学报,2019,37(5):1058-1068. |
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| 作者姓名： | 李冰 申春生 李林 张君博 胡治华 |
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| 作者单位： | 中海石油(中国)有限公司天津分公司渤海石油研究院,天津,300459;中海石油(中国)有限公司天津分公司渤海石油研究院,天津,300459;中海石油(中国)有限公司天津分公司渤海石油研究院,天津,300459;中海石油(中国)有限公司天津分公司渤海石油研究院,天津,300459;中海石油(中国)有限公司天津分公司渤海石油研究院,天津,300459 |
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| 基金项目： | 国家科技重大专项（2016ZX05058） |
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| 摘 要： | 针对地震资料难以识别薄互层储层的难题，应用研究区丰富的地震资料、钻井资料及动态资料，从沉积过程的角度出发，对其薄互层较发育的馆陶组分级次进行了精细分析: 1）在精细标定基础上进行古地形分析及钻井揭示的沉积环境分析，利用地震属性分析手段去刻画可识别的薄互层组的分布，得到砂层组级次的沉积主方向、最大厚度分布位置、储层分布范围等信息；2）基于沉积环境特征及模式分析，应用测井、岩芯和分析化验等资料，运用砂体组合模式和类比现代河流及相似油田约束单层砂体边界，恢复了砂层组内部单层砂体级次的形成过程，最终得到单层砂体的叠置样式及连通范围。通过渤海湾P19油田实际生产资料证实了研究成果的可靠性，在综合调整项目中指导井位部署和优化，提高了砂体的预测精度及注采对应率。
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| 关 键 词： | 沉积过程 辫状河三角洲前缘 薄互层 馆陶组 砂层组 单层砂体 |
| 收稿时间： | 2018-12-06 |
Fine Reservoir Analysis of Thin Interbed Layers in a Delta Based on Sedimentary Process |
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| Institution: | Bohai Oilfield Research Institute, Tianjin Branch, China National Offshore Oil Corporation, Tianjin 300459, China |
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| Abstract: | Because of the relatively low resolution of seismic data in the study area,continuous sand beds in interbedded sand-shale reservoirs cannot be distinguished by this method alone. By combining seismic,drilling and logging data in the study area,paleogeomorphological and sedimentary paleo-environment analysis revealed by drilling was carried out on the basis of precise time depth calibration. The distribution range of interbedded sand-shale reservoirs was obtained by combining this data with seismic minimum amplitude properties. The formation process of individual sand bodies in the complex interbedded sand-shale reservoir eventually led to locating a continuous monolayer sand body. Using an acoustic and apparent-thickness correction method of reconstruction established an isochronous stratigraphic framework of interbedded sand-shale reservoirs;the minimum amplitudes of the seismic data and the distribution characteristics of the interbedded sand-shale reservoir were obtained. Restricting the boundary of an individual sand body by using a sedimentary combination model and geological knowledge base enabled us to reconstruct the location of the single sand body. Finally,the reasoning behind this method of single sand body distribution was verified by dynamic data,including pressure measurement while drilling together with production and suction profile testing. The actual production data of P19 oilfield in Bohai Bay confirmed the reliability of the research results,guided well location deployment and optimization in a comprehensive adjustment project,and improved the accuracy of predicting the location of single sand bodies and the corresponding injection production rate. |
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