塔里木盆地巴麦地区泥盆系东河塘组砂岩储层致密化及成岩相

张永东; 赵永强; 马红强

doi:10.11781/sysydz201903363

塔里木盆地巴麦地区泥盆系东河塘组砂岩储层致密化及成岩相

doi: 10.11781/sysydz201903363

中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126

基金项目:

中国石化西北石油局项目“重点地区碎屑岩成岩相划分及平面展布探索”（KY2016-S-005-06）资助。

详细信息

作者简介:
张永东(1982-),男,高级工程师,主要研究方向为沉积储层和成岩作用。E-mail:zhangyd.syky@sinopec.com.cn。

中图分类号: TE122.2
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出版历程
- 收稿日期: 2018-09-25
- 修回日期: 2019-03-11
- 刊出日期: 2019-05-28

Densification and diagenetic facies of Donghetang Formation sandstone reservoir in Bachu-Maigaiti area, Tarim Basin

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

摘要

摘要: 运用碎屑岩储层和沉积研究方法，对塔里木盆地巴麦地区泥盆系东河塘组储层特征、成岩作用、致密化机理及成岩相进行分析。东河塘组储层为特低孔、特低渗储层，主要孔隙为溶蚀孔隙。通过恢复原始孔隙度，确定出主要成岩作用对于孔隙的损益量，分析出储层的致密化原因主要为压实作用，仅在少量钻井为胶结作用。储层共有6种成岩相，分别为强压实强胶结弱溶蚀相、强压实中胶结弱溶蚀相、强压实中等胶结中溶蚀相、弱压实强胶结弱溶蚀相、中压实强胶结强溶蚀相和中压实强胶结弱溶蚀相。归纳总结6种成岩相储层的测井特征，并与非取心段储层进行相似度分析，共划分了8口井23个砂岩段的成岩相。下砂岩段优势成岩相分布在巴开8井区，上砂岩段优势成岩相分布在巴探2井区。
- 致密化机理 /
- 成岩相 /
- 成岩作用 /
- 东河塘组 /
- 巴麦地区 /
- 塔里木盆地
Abstract: The reservoir characteristics, diagenesis, densification mechanism and diagenetic facies of the Donghetang Formation in the Bachu-Maigaiti area of Tarim Basin were studied using detrial reservoir and sedimentation research. The Donghetang Formation mainly contains dissolution pores, characterized by extra low porosity and permeability. Through restoring the original porosity, we identified the contribution of main diagenesis to porosity. Compaction is the main reason for reservoir densification, while cementation also works in some wells. There are six types of diagenetic facies in this reservoir, namely strong compaction and strong cementation with weak dissolution facies, strong compaction and medium cementation with weak dissolution facies, strong compaction and medium cementation with medium dissolution facies, weak compaction and strong cementation with weak dissolution facies, medium compaction and strong cementation with strong dissolution facies, and medium compaction and strong cementation with weak dissolution facies. By summarizing the well logging characteristics of the six diagenetic facies reservoirs and analyzing its similarity with the wells in the non-core sandstone segments, we discriminated the diagenetic facies of 23 sandstone segments in 9 wells. The dominant diagenetic facies of the upper sandstone is in the Batan 2 well area while the lower sandstone is in the Bakai 8 well area.
- densification mechanism /
- diagentic facies /
- diagenesis /
- Donghetang Formation /
- Bachu-Maigaiti area /
- Tarim Basin

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