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中拐地区侏罗系地层水特征及油气勘探有利区预测
CHARACTERISTICS OF JURASSIC FORMATION WATER AND PREDICTION FOR EXPLORATION FAVORABLE ZONE, ZHONGGUAI AREA
陈小蓉1 夏青2 蔡义峰2 白雪峰2 于浩业2
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作者单位:1中国石油新疆油田公司,准东采油厂
中文关键字:水型 矿化度 中高矿化度 断裂的封闭性 稠油成因
英文关键字: water type, salinity, mid-to-high salinity, sealing property of fracture, heavy-oil origin
中文摘要:  运用水文地质学原理,对准噶尔盆地中拐地区多层系地层水水型、矿化度进行分析,结果表明从石炭系、二叠系、三叠系、侏罗系到白垩系,封闭环境变差,而侏罗系是从封闭环境到开放环境的过渡带—压力平衡带,易于成藏,目前出油井点最多。通过对油层、水层、油水同层、含油水层和气水同层的试油测试,得到了不同的结果,因此对地层水矿化度浓度进行了统计,发现了高矿化度是水层的特点,中高矿化度是油气藏的有利区,据此圈定了油气勘探有利区块;研究表明,氯离子、碳酸根离子和总矿化度浓度在适中深度段最大,向浅或向深都会减小;氯根浓度与总矿化度离子浓度具有很好的正相关关系;最后指出利用水型可定性的判断断裂封闭性和稠油成因。

 

英文摘要:   Based on hydrogeology, the type and salinity of formation water in Zhongguai area, Junggar Basin, are analyzed. Results show that (1) enclosed environment became worse from Carboniferous, Permian, Triassic, Jurassic to Cretaceous; (2) easily forming a reservoir, Jurassic is the transitional zone (also pressure-balanced zone) between enclosed and open environments, where there are the most oil-producing wells. Formation tests were carried out for oil, water, oil-water, oil-bearing water and gas-water layers, and different results were also obtained. According to the study on the concentration of formation-water salinity, this paper finds out that high salinity is the property of water layer; mid-to-high salinity represents the favorable zone of oil-gas reservoir. Research also indicates that chloride, carbonate and total-salinity ion concentrations reach the maximum at medium depth, and decrease at a shallower or deeper depth. There is a positive correlation between chloride and total salinity ion concentrations. Finally, this paper points out that sealing property of fracture and heavy-oil origin can be determined qualitatively by water type.
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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
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