摘要
渤海KLA油田多口井在古近系的粗粒三角洲钻遇10~20 m厚的油层,但储层埋藏深、地震资料品质差等因素制约了该类型油藏的勘探及开发。利用岩心、测井和地震资料,建立等时地层格架,并通过压实恢复和古水深校正恢复沉积前的地形。结合坡折带坡角和坡长、沉积相组合,工区主要发育陡坡型粗粒三角洲—重力流体系、缓坡型粗粒三角洲体系。缓坡型粗粒三角洲优势储层为三角洲前缘,陡坡型三角洲优势储层为三角洲前缘、重力流沉积。在古地形基础上刻画了三角洲前缘范围,结合前缘储层特征及正演实验,优选地震属性,预测“甜点”储层分布。
Several wells of KLA oilfield have been drilled 10-20 meters thick oil layer in the coarse-grained Paleogene delta. The deep-buried reservoir and the poor seismic performance has seriously restricted the exploration and exploitation of this type of reservoir. By analyzing the core, well logging and seismic data, a stratigraphic framework was established and the paleogeomorphology was reconstructed after decompaction correction and paleobathymetric analysis. Based on the characteristics of slope angle, length and sedimentary facies, the study area mainly developed two delta system: steep gradient delta-turbidite system and low gradient coarse-grained delta system. The favorable reservoir of low gradient coarse-grained delta locates in the delta front, and the favorable reservoir of steep gradient delta system locates in the delta front and gravity current deposit. The boundary of delta front is depicted on the basis of paleotopography. In combination with reservoir architecture and forward modeling analysis, the seismic attribute is then optimized to predict the distribution of favorable reservoir.
作者
崔龙涛
张倩萍
郭诚
姚君波
曹龙
CUI Longtao;ZHANG Qianping;GUO Cheng;YAO Junbo;CAO Long(Tianjin Branch of CNOOC Ltd., Tianjin 300459, China)
出处
《断块油气田》
CAS
CSCD
北大核心
2019年第4期444-448,共5页
Fault-Block Oil & Gas Field
关键词
坡折带
粗粒三角洲
储层预测
正演
渤海湾盆地
slope zone
coarse-grained delta
reservoir prediction
forward modeling
Bohai Bay Basin
