复杂岩性油田油气层综合评价——以XX29-2油田为例  

INTEGRATED ASSESSMENT OF RESERVOIRS WITH COMPLEX LITHOLOGY IN XX29-2 OIL FIELD

作　　者：孙风涛 田晓平 李瑞娟 张国坤 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《海洋地质前沿》2016年第6期50-55,共6页Marine Geology Frontiers

基　　金：国家重大科技专项"渤海海域大中型油气田形成条件与分布"(2011ZX05023002)

摘　　要：XX29-2油田为复杂岩性油田,在近物源快速沉积背景下,储层岩性、物性变化快,纵向上为多期砂体叠置,平面上砂体相变快,非均质严重。根据岩心观察、岩石薄片鉴定、扫描电镜等资料,首先对XX29-2油田基础资料丰富的层段进行岩性识别,再利用岩矿与测井的结合,识别出无岩心、壁心等资料的层段,最终识别出研究区的岩性。又因XX29-2油田储层岩电特征复杂,电阻率测井受岩性影响较大,单纯依靠测井曲线识别油层和储层亦较困难,首先通过压汞、孔渗等资料结合岩性和沉积相对储层分类,再参考岩性、测井资料确定界限层,接着合理选择界限层进行测试,最后结合核磁共振等资料,综合识别该区的油层和储层。这种识别储层和油层的方法为渤海油田在复杂岩性中识别储层和油层提供了技术借鉴。The XX29-2 oil field is an oil field with complex lithology of reservoirs. The reservoirs of the field are formed under the circumstance of short provenance and rapid sedimentation. They change rapidly in lateral direction and are multiply superimposed in vertical direction. Upon the data from core observation, thin section analysis, scanning, the reservoirs with more data are firstly identified in the field and then followed by the reservoirs which are deficient in data. The relationship of lithology and electricity is complicated in the XX29-2 oil field. The resistivity log is seriously affected by lithol- ogy. Therefore, it is relatively difficult to identify oil layer and reservoir by only logging. It is sugges- ted that making a reservoir classification system firstly with mercury penetration, porosity and perme- ability data combining with lithology and sedimentary facies, then draw the boundary of layers with reference to lithology and logging data, and select limited beds for testing. Finally, combined with the nuclear magnetic resonance synthesize, reservoirs are identified. The case of the XX29-2 oil field may be used as a reference for reservoir identification in the Bohai Bay Basin.

关 键 词：复杂岩性 ECS测井 界限层 核磁共振 油层 

分 类 号：TE122[石油与天然气工程—油气勘探]