塔里木盆地塔中83—塔中16井区碳酸盐岩油气特征及其成因机理

doi:10.11743/ogg20120113

石油与天然气地质 ›› 2012, Vol. 33 ›› Issue (1): 101-110.doi: 10.11743/ogg20120113

塔里木盆地塔中83—塔中16井区碳酸盐岩油气特征及其成因机理

杨俊¹, 姜振学^2,3, 向才富^2,3, 王红平⁴

1. 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 214151;
2. 中国石油大学油气资源与探测国家重点试验室, 北京 102249;
3. 中国石油大学资源与信息学院盆地中心, 北京 102249;
4. 中国石油石油勘探开发研究院杭州分院, 浙江杭州 310023

收稿日期:2011-06-16 修回日期:2011-12-21 出版日期:2012-02-28 发布日期:2012-03-22
基金项目:
国家重点基础研究发展计划("973"计划)项目(2006CB202308);国家自然科学基金项目(40972088)。

Carbonate reservoir characteristics and their genetic mechanisms in Tazhong83-Tazhong16 wellblock,Tarim Basin

Yang Jun¹, Jiang Zhenxue^2,3, Xiang Caifu^2,3, Wang Hongping⁴

1. Wuxi Research Institute of Petroleum Geology, SINOPEC Petroleum Exploration and Production Research Institute, Wuxi, Jiangsu 214151, China;
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
3. Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249, China;
4. Hangzhou Branch, PetroChina Research Institute of Petroleum Exploration & Development, Hangzhou, Zhejiang 310023, China

Received:2011-06-16 Revised:2011-12-21 Online:2012-02-28 Published:2012-03-22

摘要/Abstract

摘要：

塔里木盆地塔中隆起塔中83—塔中16井区下古生界海相碳酸盐岩含油气层位多,油气性质差异大,油(气)、水分布复杂。以研究区现今油气特征为基础,结合塔中隆起成藏过程,从油气运移的动态角度,突出分析了"喜马拉雅期天然气气侵对现今油气性质和分布具有决定性影响"的成因机理,得出:1)同一层位、不同区带的油气藏,因存在多个气源断裂,表现出"两端为气,中间为油"的特征;2)同一地区、不同层位的油气藏,因沿主要气源断裂气侵的天然气量有限,以及碳酸盐岩储层的非均值性,从下至上表现出"从纯气藏变为凝析气藏直至油藏"的特征;3)同一层位、同一区带,因局部构造形态(分割槽)和致密层的存在,油(气)、水分布突变。总结认为,气源断裂、不整合面作为优势通道主导运移方向,局部构造形态及致密层限定油气运移范围,二者是研究区油气性质和油(气)、水分布的主控因素。预测勘探层位越深,越靠近气源断裂,则越有利于天然气勘探。

关键词: 油气性质差异, 成因机理, 油气运移, 碳酸盐岩, 塔中隆起, 塔里木盆地

Abstract:

The Lower Paleozoic marine carbonate reservoirs in Tazhong83-Tazhong16 wellblock in Tazhong uplift within Tarim Basin have multiple oil/gas-bearing horizons,great differences in hydrocarbon properties and complicated oil/gas-water contact.On the basis of current hydrocarbon reservoir characteristics in the study area,in conjunction with the hydrocarbon accumulation process in Tazhong uplift,we analyzed the genetic mechanism of "the Himalayan gas invasion's decisive influence on current nature and distribution of hydrocarbon reservoirs" from the viewpoint of dynamic hydrocarbon migration,and drew three conclusions: (1) Hydrocarbon pools in the same horizon but different areas show the characteristics of "gas at both ends and oil in the middle" due to the existence of multiple faults connected with gas sources; (2) Hydrocarbon pools in the same area but at different horizons show the characteristics that "pure gas change progressively into condensate gas and finally into oil from bottom to top due to the limited gas charge along faults connected with gas sources and the heterogeneity of carbonate reservoirs; (3) Hydrocarbon pools in the same horizon and same area show abrupt change of oil/gas-water contact due to the local structural configuration and the existence of tight barriers.It is believed that the faults connected with gas source and unconformities that serve as the dominant hydrocarbon migration pathways control the direction of hydrocarbon migration,while the local structure configuration and tight barriers confine the extent of hydrocarbon migration.They both are the major factors controlling the nature of hydrocarbon reservoirs and the oil/gas-water contact.It is estimated that the deeper the exploration targets are and the closer they are to the faults connected with gas sources,the more favorable they are to gas exploration.

Key words: difference in hydrocarbon properties, genetic mechanism, hydrocarbon migration, carbonate rock, Tazhong uplift, Tarim Basin

中图分类号:

TE122.1

杨俊,姜振学,向才富,等. 塔里木盆地塔中83—塔中16井区碳酸盐岩油气特征及其成因机理[J]. 石油与天然气地质, 2012, 33(1): 101-110. doi: 10.11743/ogg20120113 Yang Jun,Jiang Zhenxue,Xiang Caifu,et al. Carbonate reservoir characteristics and their genetic mechanisms in Tazhong83-Tazhong16 wellblock,Tarim Basin[J]. Oil & Gas Geology, 2012, 33(1): 101-110. doi: 10.11743/ogg20120113

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塔里木盆地塔中83—塔中16井区碳酸盐岩油气特征及其成因机理

Carbonate reservoir characteristics and their genetic mechanisms in Tazhong83-Tazhong16 wellblock,Tarim Basin

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