歧口凹陷沙河街组一段层序格架和储层质量分析
- 中国石油大学资源与信息学院 油气资源与探测国家重点实验室 北京 102249
- 收稿日期:
1900-01-01
- 修回日期:
1900-01-01
- 刊出日期:
2007-12-10
摘要: 层序地层格架与储层质量之间具有明显的关联，不同沉积体系域具有不同的岩性组合，经历了不同的成岩过程，造成了储层质量差异。本文综合利用地质和地球物理资料，以歧口凹陷沙一段为研究对象，重点讨论了沙一段层序地层格架、成岩演化和储层质量之间的关系，指出沙一段可划分成三个三级层序，每个层序均发育低位、湖侵和高位体系域。低位和高位体系域多发育三角洲和水下扇成因的砂砾岩，这些沉积砂砾岩目前处于成岩演化的中期。受原始沉积环境和成岩环境等因素的影响，不同沉积体系的储层质量存在明显的不同。高位体系域多发育三角洲和重力流成因的、相对较粗的砂砾岩，加之埋深相对较浅，所以相对于低位体系域储层来说，具有较好的储层质量。最后，依据层序格架、沉积类型和成岩作用综合研究，指出歧北次凹沙一段储层的储集物性比歧南次凹好，沙一上层序的储层物性比沙一下层序和沙一中层序的好，从而评价预测了沙一段有利储层的空间分布。
Sequence Framework and Reservoir Quality of Sha 1 Member inShahejie Formation, Qikou Sag
- Faculty of Geoscience, China University of Petroleum, National Key Lab for Petroleum Resource and Protection, Changping Beijing 102249
- Received Date:
1900-01-01
- Rev Recd Date:
1900-01-01
- Publish Date:
2007-12-10
Abstract: There is a close relation between the sequence framework and reservoir quality, the different lithologic assemblage exists in different systems tracts which go through the different diageneisis, therefore, the reservoir quality in different systems tract is different. The relation among the sequence framework, diageneisis process, and reservoir quality has been paid much attention in this paper by the comprehensive study of geological and geophysical data. The Sha 1 Member of Tertiary in Qikou Sag could be divided into three sequences in the third class, which are consisted of LST, TST and HST. The sandstone and conglormarate from delta and subaqeous fan were developed in HST and has been in middle stage of diagenisis evolution with relative shallow depth, therefore, the reservoir quality of the sandstone and conglormarate is better than sandstone of LST. The reservoir quality in different systems tract is obvious different. Lastly, favorable and high quality reservoir has been forecasted according to the results of sequence framework, sedimentary facies and diagenesis of Sha1 member, that is, reservoir quality of Sha1 member in Qibei sub depression could be better than the quality in Qinan sub depression, and the reservoir quality of Sha 11 member could be better than the quality of Sha 12 member and Sha 13 member.
朱筱敏. 歧口凹陷沙河街组一段层序格架和储层质量分析[J]. 沉积学报, 2007, 25(6): 934-941.
| 引用本文: |
朱筱敏. 歧口凹陷沙河街组一段层序格架和储层质量分析[J]. 沉积学报, 2007, 25(6): 934-941.
|
ZHU Xiaomin. Sequence Framework and Reservoir Quality of Sha 1 Member inShahejie Formation, Qikou Sag[J]. Acta Sedimentologica Sinica, 2007, 25(6): 934-941.
| Citation: |
ZHU Xiaomin. Sequence Framework and Reservoir Quality of Sha 1 Member inShahejie Formation, Qikou Sag[J]. Acta Sedimentologica Sinica, 2007, 25(6): 934-941.
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