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鄂尔多斯盆地宜川—句邑地区长8储集层碳酸盐胶结物特征
引用本文:田亚铭,施泽进,宋江海,吴晓明,高翔,洪成云. 鄂尔多斯盆地宜川—句邑地区长8储集层碳酸盐胶结物特征[J]. 成都理工大学学报(自然科学版), 2011, 38(4): 378-384
作者姓名:田亚铭  施泽进  宋江海  吴晓明  高翔  洪成云
作者单位:1. 成都理工大学地球科学学院,成都,610059
2. 成都理工大学“油气藏地质及开发工程”国家重点实验室,成都,610059
3. 长庆油田公司勘探开发研究院,西安,710021
4. 长庆油田公司第七采油厂,西安,710021
5. 中国石油集团长城钻探工程有限公司录井公司,辽宁盘景,124010
基金项目:国家自然科学基金重点项目资助
摘    要:鄂尔多斯盆地廷长组储层质量严重地受碳酸盐胶结物影响.通过对宜川—句邑地区长8储集层薄片、碳酸盐胶结物碳氧同位素及流体包裹体测试分析,表明碳酸盐胶结物主要是铁方解石(含铁方解石),在薄层砂岩中和厚层砂岩顶底与泥岩紧密毗邻的区域含量较高,以中细晶及粗—巨晶颗粒充填孔隙.碳酸盐胶结物δ13CPDB值为-5.56‰~0.22‰...

关 键 词:碳酸盐胶结物  碳氧同位素  流体包裹体  延长组  鄂尔多斯盆地

Characteristics of carbonate cements of Member 8 of Yanchang Formation in the Yichuan-Xunyi area,Ordos Basin, China
TIAN Ya-ming,SHI Ze-jin,SONG Jiang-hai,WU Xiao-ming,GAO Xiang,HONG Cheng-yun. Characteristics of carbonate cements of Member 8 of Yanchang Formation in the Yichuan-Xunyi area,Ordos Basin, China[J]. Journal of Chengdu University of Technology: Sci & Technol Ed, 2011, 38(4): 378-384
Authors:TIAN Ya-ming  SHI Ze-jin  SONG Jiang-hai  WU Xiao-ming  GAO Xiang  HONG Cheng-yun
Affiliation:1b 1.College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China;2.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;3.Changqing Oil field Company,Xi’an 710021,China;4.The Seven Oil Factory of Changqing Oilfield Company,Xi’an 710021,China;5.GWDC Mud Logging Company,Panjin 124010,China)
Abstract:The reservoir quality of Upper Triassic Yanchang Formation in Ordos Basin is seriously affected by the carbonate cements.The thin sections are analysed,and the carbon and oxygen isotopes of carbonate cements and fluid inclusions are tested.The study results indicate that the carbonate cements of Member 8 of Yanchang Formation reservoir on the south-east edge of Ordos Basin are mainly iron carbonate cements calcite(ferrous calcite) cementation,which exist on the thin sandstone and thick sandstone to nearly mudstone.The carbonate cements fill pores with fine-grained and coarse-giant crystal particles.The test analysis results of the carbon and oxygen isotopes of the carbonate cements and fluid inclusions show that δ13CPDB value is-5.56‰~-0.22‰,and δ18OPDB-10.58‰~-21.47‰,that the fluid inclusion homogenization temperature is 58~121℃,and the main temperature ranges from 100~110 ℃.The genesis analysis of the carbonate cements show that the main source of carbonate cement materials is related to the evolution of organic matter and clay minerals formed in a relatively later era.The development of a large number of carbonate cements has serious negative effects on the reservoir properties.
Keywords:carbonate cement  carbon and oxygen isotopes  fluid inclusions  Yanchang Formation  Ordos Basin
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