库车坳陷依南地区阿合组致密砂岩气储层特征与有利区带预测

康海亮; 林畅松; 李洪辉; 王开忠

doi:10.11781/sysydz201602162

库车坳陷依南地区阿合组致密砂岩气储层特征与有利区带预测

doi: 10.11781/sysydz201602162

1.
中国地质大学(北京)能源学院, 北京 100083
2. 中国地质大学(北京)海洋学院, 北京 100083
3. 中国石油勘探开发研究院, 北京 100083
4. 北京科泰锐哲沃斯科技有限公司, 北京 100085

基金项目: 国家自然科学基金重点项目"塔里木盆地古生代关键变革期的古构造古地理演变及油气聚集"(41130422)资助。

详细信息

作者简介:
康海亮(1981-),男,博士研究生,主要从事沉积学与油气地质学研究。E-mail:lianghk2008@163.com。

中图分类号: TE132.2
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出版历程
- 收稿日期: 2015-05-05
- 修回日期: 2016-01-04
- 刊出日期: 2016-03-28

Reservoir characteristics and favorable zone prediction of tight sandstone gas of the Ahe Formation in Yinan area, Kuqa Depression

1.
School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China
2. School of Ocean Sciences, China University of Geosciences(Beijing), Beijing 100083, China
3. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
4. Beijing Co-Tech Reservoirs Technology Co Ltd, Beijing 100085, China

摘要

摘要: 库车坳陷依南地区下侏罗统阿合组具有形成致密砂岩气的有利地质条件,并已获勘探证实。通过对岩心、录井、测井资料、普通薄片及铸体薄片的观察鉴定以及扫描电镜、黏土矿物X射线衍射分析,认为研究区致密砂岩储层的成因类型主要为辫状分流河道和水下分流河道;岩石类型以岩屑砂岩为主,岩石成分成熟度低,结构成熟度中等,裂缝发育,孔隙度集中分布在4%~12%,平均为7.53%,渗透率集中在(0.1~100)×10^-3 μm²,平均为12.33×10^-3 μm²,其中小于1×10^-3 μm²的样品占到75%,属于典型的致密砂岩储层。储层形成与沉积背景、成岩作用和构造作用等因素相关。综合有利相带、特征曲线重构反演砂岩厚度、裂缝发育程度,结合构造背景对有利区进行了综合预测,指出有利区主要发育在依南2、依南5和吐孜2井一线南侧,其中依南2井南侧和西南侧潜力最大,是下一步勘探的重点。
- 致密砂岩储层 /
- 控制因素 /
- 有利区预测 /
- 阿合组 /
- 依南地区 /
- 库车坳陷 /
- 塔里木盆地
Abstract: The Lower Jurassic Ahe Formation in Yinan area of the Kuqa Depression has favorable geologic conditions for the formation of tight sandstone gas reservoirs. Core, logging, drilling data, thin section observation, cast thin section identification, scanning electron microscope and the X-ray diffraction analysis of clay minerals showed that the tight sandstone reservoirs in the study area mainly originated from braided distributary channels and underwater distributary channels.Lithic sandstones are dominant with low compositional maturity and medium textural maturity. Fractures were well developed. The porosity is 4%-12%, averages 7.53%. The permeability is (0.1-100)×10^-3 μm², average 12.33×10^-3 μm². The samples with a permeability less than 1×10^-3 μm² account for 75%, consistent with typical tight sandstone reservoirs. Reservoir formation is related to sedimentation, diagenesis and tectonism. Favorable facies belts and characteristic curves were applied to reconstruct sandstone thickness and fracture distribution, and to predict favorable exploration targets combined with tectonic background. The study showed that the area to the south of wells Yinan2, Yinan5 and Tuzi2 is a potential play for tight sandstone gas exploration, especially the area to the south and southwest of well Yinan2.
- tight sandstone reservoir /
- controlling factor /
- prediction of favorable zone /
- Ahe Formation /
- Yinan area /
- Kuqa Depression /
- Tarim Basin

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