麦盖提斜坡东段奥陶系内幕白云岩储集层分布预测  

Prediction of Inner Dolomite Reservoir Distribution of Ordovician in Eastern Segment of Maigaiti Slope, Tarim Basin

作　　者：田雷[1] 崔海峰[1] 张年春[1] 冯晓军[2] 张继娟[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,兰州730020 [2]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《新疆石油地质》2016年第2期152-157,共6页Xinjiang Petroleum Geology

基　　金：中国石油科学研究与技术开发项目(090106-4)

摘　　要：为查明塔西南坳陷麦盖提斜坡东段奥陶系内幕白云岩储集层分布规律,根据钻井、地震资料,对储集层发育特征及其地震响应特征进行了分析。分析结果表明,麦盖提斜坡东段奥陶系内幕白云岩普遍发育裂缝-孔洞型储集层,在地震剖面上主要表现为"串珠状"强振幅异常,储集层发育受控于构造作用形成的断裂和裂缝。储集层地震预测结果显示,内幕白云岩储集层呈星点状广泛分布在麦盖提斜坡东段玛扎塔格构造带南斜坡。麦盖提斜坡东段内幕白云岩在发育层位、储集层类型、储盖组合、地震响应特征等方面都与塔中地区和古城地区具有良好的可对比性,是麦盖提斜坡寻找油气的突破口。Based on the drilling, seismic data, this paper analyzed the reservoir characteristic and its seismic response characterisitc in or-der to find out the inner dolomite reservoir distribution in eastern Maigaiti slope in Taxinan depression of Tarim basin. The result showsthat fractured-vugging reservoirs are widely developed in the inner dolomite in this area, with beads-like strong amplitude anomalies on theseismic profile, and controlled by faults and fractures formed from tectonism. The seismic prediction result indicates that the inner dolomitereservoirs are widely stellate distributed in the south slope of Mazatag structural zone in eastern Maigaiti slope. There are good comparabili-ty among such dolomites and Tazhong and Gucheng areas in terms of developed horizon, reservoir type, reservoir-cap rock assembly andseismic response, etc, which could be regarded as a breakthrough target for oil and gas discovery in Maigaiti slope area.

关 键 词：塔里木盆地 麦盖提斜坡 奥陶系 内幕白云岩 储集层 分布预测 

分 类 号：TE112.24[石油与天然气工程—油气勘探]