东营三角洲前缘坡移扇储集体特征及成因研究

Reservoir characteristics and genesis of slope fans in Dongying delta front

王伟锋 胡瑜 于正军 陈杰 单晨晨 张晓杰

Wang Weifeng Hu Yu Yu Zhengjun Chen Jie Shan Chenchen Zhang Xiaojie

中国石油大学 地球科学与技术学院, 山东 青岛 266580 2. 中国石化 胜利油田 物探研究院, 山东 东营 257000

School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China 2. Geophysical Research Institute of SINOPEC Shengli Oilfield, Dongying, Shandong 257000, China

坡移扇是指在地震等因素触发下，三角洲或扇三角洲前缘斜坡带砂体以滑动、滑塌或碎屑流的形式在斜坡带内发生再搬运形成的一种事件性沉积体。经钻井岩心描述、测井、地震资料综合分析，结合野外考察和物理模拟实验研究表明：坡移扇储集体以细、粉砂岩为主，发育块状层理、重荷模、滑塌构造等，测井曲线为中等至高幅的齿化箱型、指形，地震相呈丘形、楔形，中强振幅，岩心和野外地质特征上，坡移扇表现为滑动型砂体、滑塌型砂体以及碎屑流型砂体；根据沉积模拟实验结果，按成因划分出7种坡移扇砂体，并结合东营凹陷牛庄洼陷地质条件对坡移扇的分布进行预测，划分出2个有利勘探目标区。

Slope fan refers to a sedimentary sand body which evolved from retransportation of delta or fan delta sand. It is caused by earthquakes and other factors and is transported in the form of slide, slump or debris flow. Based on core description, well logging and seismic data, combined with field investigation and sedimentation simulation, the reservoir characteristics and genesis were summarized. The lithology of a slope fan sand body is mainly fine sandstone and siltstone. Sedimentary structures are characterized by massive bedding, load cast and slump structures. It can be identified as a blocky or finger wireline log. The seismic facies is moundy or sphenoid shaped and the amplitude is moderate to strong. Slope fans are manifested as slide, slump and debris flow sand bodies. According to sedimentation simulation, 7 slope fan styles were differentiated. Combined with the geology of the Niuzhuang Subsag in the Dongying Sag, the distribution of slope fans was forecasted and two favorable prospecting target areas of slope fan were identified.

中国石化胜利油田分公司科研项目（YKW1405）资助。

https://doi.org/10.11781/sysydz201605600