CHARACTERISTICS OF STRATIGRAPHIC WATER IN THE MIDDLE AND DEEP LAYERS OF LEDONG DISTRICT, YINGDONG SLOPE, YINGGEHAI BASIN AND ITS RELATIONSHIP WITH OIL AND GAS
-
摘要:
油气田伴生地层水地球化学特征蕴含多种油气地质及水文地质信息，可以为油气成藏的圈闭条件评价及展布特征分析等提供重要的信息和佐证。由于油气田地层水与油气藏伴生且受成烃成藏环境及后期保存条件等多种地质因素的影响，故其地质地球化学特征与油气运聚成藏过程及后期圈闭保存条件等密切相关。莺歌海盆地乐东区中深层高温超压大气田伴生地层水总矿化度异常高(60 000~80 000 mg/L)，pH值为6~8，属于弱酸—弱碱性的盐水和卤水，其地层水类型属CaCl2水型，为一种非常特殊的高矿化度气田伴生地层水。通过莺歌海盆地乐东区中深层气田伴生地层水pH值、常规离子组成、主要元素及其组合特点等统计分析，获取了这种高温超压大气田伴生地层水的大量地质地球化学信息，并深入分析探讨了其与天然气运聚成藏及其分布的成因联系。
Abstract:Associated stratigraphic water in an oil and gas field contains a variety of information on oil and gas geology and may provide important evidence for evaluation of trap conditions and the distribution patterns of hydrocarbon accumulations. It is closely associated with oil and gas reservoirs and affected by many geological factors, such as hydrocarbon formation and storage conditions, post-storage conditions, geological and geochemical characteristics related to hydrocarbon migration and accumulation processes and the later trapping and preservation conditions. The total mineralization or salinity of the associated stratigraphic water in the middle-deep layers of the gas fields under high temperature and overpressure in the Ledong District of the Yinggehai Basin is abnormally high (60 000 mg/L-80 000 mg/L). It is a kind of weak acid-weak alkaline brine rich in CaCl2 with a pH of 6-8. Based upon the geological and geochemical characteristics of the associated stratigraphic water, we discussed in this paper the genetic relationship between the stratigraphic water and the migration and accumulation of gas.
-
-
表 1 乐东10区气田伴生地层水主要离子含量分布特征
Table 1. Distribution of main ions in the stratigraphic water from Ledong-10 district
层位(范围/平均值) 深度范围/m 底层水离子含量/(mg/L) K++Na+ Ca2+ Mg2+ So42- HCO3- CL- 黄流组一段 3711~3711 11529~28000 11~52 1~17 1644~8424 3330~6451 12700~26332 11529~28000 11~52 1~17 1644~8424 3330~6451 12700~26332 黄流组二段 3845.4~4212.48 3274~12980 4~119 1~8 110~12720 1922~16100 3344~35221 15020.05 51.24 4.05 5039.43 6981.86 13107.43 梅山组一段 4062.1~4158.3 4821~33333 1~117 1~38 170~13354 8587~22643 1523~19337 17070 52.3 16 5538.1 13629.7 8794.3 梅山组二段 4052.8~4151 3274~26407 28~260 2~57 257~15916 1922~17415 3435~17723 9769.33 115.5 21.17 4587.33 6109.83 7425.17 
下载: 导出CSV
-
[1] 刘志杰, 卢振权, 张伟, 等.莺歌海盆地中央泥底辟带东方区与乐东区中深层成藏地质条件[J].海洋地质与第四纪地质, 2015, 35(4):49-61. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201504007
[2] 张启明.莺-琼盆地的演化与构造——热体制[J].天然气工业, 1999(1):36-42. http://d.old.wanfangdata.com.cn/Periodical/trqgy199901004
[3] 郝芳, 董伟良, 邹华耀, 等.莺歌海盆地汇聚型超压流体流动及天然气晚期快速成藏[J].石油学报, 2003, 24(6): 79-85. http://d.old.wanfangdata.com.cn/Periodical/syxb200306002
[4] 王振峰, 胡代圣.莺歌海盆地中央泥拱构造带大气田勘探方向[J].天然气工业, 1999, 19(1): 28-30. doi: 10.3321/j.issn:1000-0976.1999.01.008
[5] 裴健翔, 于俊峰, 王立锋, 等.莺歌海盆地中深层天然气勘探的关键问题及对策[J].石油学报, 2011, 32(4): 573-579. http://d.old.wanfangdata.com.cn/Periodical/syxb201104003
[6] 郝芳, 李思田, 龚再升, 等.莺歌海盆地底辟发育机理与流体幕式充注[J].中国科学(D辑:地球科学), 2001(6):471-476. http://d.old.wanfangdata.com.cn/Periodical/zgkx-cd200106005
[7] 林腊梅, 王伟峰.油气田水文地质学[M].东营:中国石油大学出版社, 2010: 64-65.
[8] 李贤庆, 侯读杰, 张爱云.油田水地球化学研究进展[J].地质科技情报, 2001(2):51-54. doi: 10.3969/j.issn.1000-7849.2001.02.012
[9] 高锡兴, 中国含油气盆地油田水[M].北京:石油工业出版社, 1994:358-359.
[10] 严金泉, 胡晓凤.江汉盆地下三叠统—石炭系水文地质条件及对油气保存条件的影响[J].石油天然气学报(江汉石油学院学报), 2006, 28(2):42-44. http://d.old.wanfangdata.com.cn/Periodical/jhsyxyxb200602012
[11] 史建南, 姜建群, 张福功, 等.大民屯凹陷地层水水文地质特征与油气聚集关系[J].海洋地质动态, 2003, 19(11):24-30 doi: 10.3969/j.issn.1009-2722.2003.11.007
[12] 陈建平, 查明, 周瑶琪.准噶尔盆地西北缘地层水化学特征与油气关系研究[J].地质地球化学, 2000, 28(3):54-58 doi: 10.3969/j.issn.1672-9250.2000.03.006
[13] 张宗峰, 查明, 高长海.大港油田埕北断阶区地层水化学特征与油气成藏[J].石油与天然气地质, 2009, 30(3):268-374. doi: 10.3321/j.issn:0253-9985.2009.03.003
[14] 曹海防, 夏斌, 张娣, 等.松辽盆地地层水化学特征及其流体-岩石相互作用探讨[J].天然气地球科学, 2006, 17(4):566-572 doi: 10.3969/j.issn.1672-1926.2006.04.028
[15] 刘桂凤, 吴运强, 赵增义, 等.克拉玛依百口泉油田地层水化学特征与油气成藏关系[J].中外能源, 2007, 12(1):29-34. doi: 10.3969/j.issn.1673-579X.2007.01.006
[16] 张伟, 何家雄, 龚晓峰, 等.莺歌海盆地中央泥底辟带气田水地球化学特征及其油气地质意义[J].海洋地质与第四纪地质, 2013, 33(5):119-128. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201305012
-
图(6)
表(1)
计量
- 文章访问数: 1456
- PDF下载数: 21
- 施引文献: 0