洼38块东二段沉积微相分析与水平井部署  

Sedimentary Microfacies Analysis and Horizontal Well Deployment of Second Member of Dongying Formation in Wa 38 Block

作　　者：杨永恒[1] 

机构地区：[1]中国石油辽河油田公司,辽宁盘锦124010

出　　处：《承德石油高等专科学校学报》2015年第5期5-9,共5页Journal of Chengde Petroleum College

摘　　要：洼38块东二段发育断鼻构造油气藏,目前处于高含水阶段,近几年利用水平井挖潜井间开发4小层剩余油效果较好,沉积微相分析是水平井部署中的一个重要环节。通过建立沉积微相测井图版、编制连井沉积剖面,以及分析平面沉积相带展布,将水平井部署于扇三角洲前缘河口沙坝微相带。河口沙坝砂体平面分布稳定,纵向厚度变化不大,连续性和物性较好。两口水平井水平段的钻遇率为100%,投产后初期日产油6.7 t,目前日产油4.6 t,含水相对较低,说明沉积微相分析保证了水平段钻遇率,使水平井获得了较高的产能。沉积微相分析在洼38块西部东二段4小层水平井部署中发挥了重要作用,对于类似油藏的开发具有参考价值。The oil well watercut in the second member of Dongying formation in block Wa 38 developed structural reservoir is very high now. In recent years, horizontal wells are drilled to exploit re- maining oil. Sedimentary microfacies analysis is an important step in the procedure of horizontal well deployment, which includes establishing microfacies logging chart, drawing sedimentary connecting- well sections, and figuring out the planar distribution of microfacies. On the basis of these work, horizontal wells are deployed in the channel mouth bar belt of fan delta front. The sand body of channel mouth bar, of which the continuity and physical properties is good with stable distribution and less vertical variation. The sand body drilling ratios of the two horizontal wells are both 100%. Each well produces 6.7 ton oil every day at first and 4.6 ton oil at present, with a relatively lower watercut. These data indicate that microfaeies analysis ensures not only a high drilling ratio but also a stable productivity. Mierofaeies analysis plays a vital role in horizontal well deployment in research region, and has reference value for similar reservoir exploration.

关 键 词：沉积微相分析 水平井部署 东二段 洼38块 辽河坳陷 

分 类 号：TE34[石油与天然气工程—油气田开发工程]