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中南大学学报(自然科学版)

Journal of Central South University

第46卷    第6期    总第250期    2015年6月

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文章编号:1672-7207(2015)06-2162-09
渤南洼陷沙四上亚段多类型储集体沉积成岩差异性分析
于洋1,刘鹏1,宋国奇1, 2,刘雅利3

(1. 中国石油大学(华东) 地球科学与技术学院,山东 青岛,266000;
2.中国石化胜利油田分公司,山东 东营,257000;
3. 中国石化胜利油田分公司 地质科学研究院,山东 东营,257000
)

摘 要: 针对渤南洼陷沙四上亚段发育的多类型储集体成因机制不明、成岩演化不清等问题,利用钻井、测井及分析化验等资料,对渤南洼陷沙四上亚段早、晚沉积期形成的中盐湖盆和多盐湖盆从沉积、成岩2个方面进行对比研究,并预测有利储集体类型。研究结果表明:中盐湖盆与多盐湖盆在沉积期的气候、水体和地貌环境方面都存在明显差异,各自形成不同类型的储集体;受控于膏岩层产生的碱卤水,2类湖盆都经历酸碱交替的成岩环境,其中多盐湖盆受碱性流体影响较大,导致两类湖盆在各成岩阶段的成岩作用强度不同;砂岩滩坝和扇三角洲前缘为中盐湖盆有利储集体类型,近岸水下扇扇端和扇三角洲前缘为多盐湖盆有利储集体类型,多盐湖盆寻找有利储集体应尽量避开受碱性流体影响较大的2.8~3.3 km深度段。

 

关键字: 沉积-成岩差异性;多类型储集体;沙四上亚段;渤南洼陷

Analysis of differences about sedimentation and diagenesis of multi-type reservoir in upper part of Es4 in Bonan sag
YU Yang1, LIU Peng1, SONG Guoqi1, 2, LIU Yali3

1. College of Geo-Science and Technique, China University of Petroleum (Hua Dong), Qingdao 266000, China;
2. Shengli Oilfield Company, SINOPEC, Dongying 257000, China;
3. Geological Science Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257000, China

Abstract:The genetic mechanism and diagenesis evolution about multi-type reservoir in the upper part of Es41 in Bonan Sag are complex and are still poorly understood. To solve these problems, based on comprehensive analysis of drilling data, logging data and analysis testing data, a contrast study was carried out about sedimentation and diagenesis of moderate salt lake basin and multiple salt lake basin that developed in early stage and later stage of Es41 in Bonan Sag, and predicted the favorable reservoirs. The results show that obvious differences exist about climate, water body and palaeogeo morphology in moderate salt lake basin and multiple salt lake basin at depositional stage, that controlled by alkali halide from gypsum, the two types of lake basins undergo alternately diagenetic environment of acid and alkali, and the multiple salt lake basin is influenced by alkali halide more seriously. The intensity of diagenesis is different between moderate salt lake basin and multiple salt lake basin at different diagenesis stage, the sandstone beach bar and fan delta front are favorable reservoirs in moderate salt lake basin and near-shore subaqueous fan front and fan delta front are favorable reservoirs in multiple salt lake basin, the depth range between 2 800 m and 3 300 m is influenced by alkali halide more serious and there exist no favorable reservoirs, which should be kept away when seeking favorable reservoir.

 

Key words: differences about sedimentation and diagenesis; multi-type reservoir; upper part of the Es4; Bonan sag

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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