鄂尔多斯盆地东北部奥陶系马五1+2微生物碳酸盐岩沉积特征及储集意义
- 熊鹰1,2,
- 姚泾利3,
- 李凌1,2,
- 侯云东3,
- 肖笛2,
- 聂万才3,
- 赵东方1,
- 谭秀成1,2,
- 1. 油气藏地质及开发工程国家重点实验室 西南石油大学 成都 610500;
- 2. 中国石油碳酸盐岩储层重点实验室沉积-成藏研究室 西南石油大学 成都 610500;
- 3. 中国石油长庆油田公司勘探开发研究院 西安 710021
基金项目:
国家科技重大专项项目（2016ZX05004002-001，2016ZX05004006-001-002）；四川省省属高校“非常规油气”科研创新团队建设计划
作者简介:
熊鹰,男,1993年出生,硕士研究生,储层地质学,E-mail:xiongying511602@163.com
- 收稿日期:
2015-11-05
- 修回日期:
2016-01-22
- 刊出日期:
2016-10-10
摘要: 基于岩芯、薄片及物性资料，研究鄂尔多斯盆地东北部奥陶系马五1+2微生物岩沉积特征及其油气储集意义。研究区发育有不同规模的由蓝细菌群落构成的微生物碳酸盐岩建造，由叠层石、菌纹层白云岩、蓝细菌凝块岩以及菌黏结颗粒岩构成了藻坪和微生物丘建造。微生物丘纵向上建造规模较小，单旋回厚度一般小于1 m，发育于潮下高能环境，并由花斑状砂屑云岩、蓝细菌凝块岩、菌黏结砂屑云岩、菌纹层白云岩构成了丘基-丘核-丘坪的向上变浅序列，也常与颗粒滩相伴生构成丘滩复合体。其中，发育于丘核部位的蓝细菌凝块岩和菌黏结砂屑云岩中窗格孔和粒间孔发育，表现为中孔低渗特征，可作为盆地东北部的储集岩之一。
Sedimentary Characteristics and Reservoir Significance of Microbial Carbonate in Ma51+2 Member of Ordovician in Northestern Ordos Basin
- XIONG Ying
1,2,
- YAO JingLi
3,
- LI Ling
1,2,
- HOU YunDong
3,
- XIAO Di
2,
- NIE WanCai
3,
- ZHAO DongFang
1,
- TAN XiuCheng
1,2,
- 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
- 2. PetroChina Deposition and Accumulation Department of Key Laboratory of Carbonate Reservoirs, Southwest Petroleum University, Chengdu 610500, China;
- 3. Exploration and Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an 710021, China
Funds:
National Science and Technology Major Projects, No.2016ZX05004002-001, 2016ZX05004006-001-002; Sichuan Provincial University "non conventional Oil and Gas" Scientific Research and Innovation Team Construction Plan
- Received Date:
2015-11-05
- Rev Recd Date:
2016-01-22
- Publish Date:
2016-10-10
Abstract: Based on core, thin section and physical properties, the sedimentary characteristics and reservoir significance of microbial carbonate in Ma51+2 member of Ordovician in northestern Ordos Basin were studied. Different scale of microbial carbonates constructions formed by cyanobacteria community were found in the study area. Algal flat and microbial mound are found in Ma51+2 member, formed by stromatolite, cyanobacteria laminar dolomitite, cyanobacteria thrombolite and some grainstone connected with microbes. The microbial mound develops on a small scale in vertical, mostly less than 1 m thick per cycle. And, the microbial mound has a depositional model of mound base-core-flat in vertical which reflects a drop in sea level, formed by piebald clastic dolomite, cyanobacteria thrombolite, algal bound sand-clastic dolomitite and cyanobacteria laminar dolomitite. Besides, it also develops into the mound-shoal complex together with grain beach. Fenestral pores and intergranular dissolved pores were found in cyanobacteria thrombolite and algal bound sand-clastic dolomitite which shows the characteristics of medium porosity and low permeability totally. It can be one of the reservoir rocks in northestern Ordos Basin.
熊鹰, 姚泾利, 李凌, 侯云东, 肖笛, 聂万才, 赵东方, 谭秀成. 鄂尔多斯盆地东北部奥陶系马五1+2微生物碳酸盐岩沉积特征及储集意义[J]. 沉积学报, 2016, 34(5): 963-972. doi: 10.14027/j.cnki.cjxb.2016.05.015
XIONG Ying, YAO JingLi, LI Ling, HOU YunDong, XIAO Di, NIE WanCai, ZHAO DongFang, TAN XiuCheng. Sedimentary Characteristics and Reservoir Significance of Microbial Carbonate in Ma51+2 Member of Ordovician in Northestern Ordos Basin[J]. Acta Sedimentologica Sinica, 2016, 34(5): 963-972. doi: 10.14027/j.cnki.cjxb.2016.05.015
| Citation: |
XIONG Ying, YAO JingLi, LI Ling, HOU YunDong, XIAO Di, NIE WanCai, ZHAO DongFang, TAN XiuCheng. Sedimentary Characteristics and Reservoir Significance of Microbial Carbonate in Ma51+2 Member of Ordovician in Northestern Ordos Basin[J]. Acta Sedimentologica Sinica, 2016, 34(5): 963-972. doi: 10.14027/j.cnki.cjxb.2016.05.015
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