川西大邑断挡背斜构造地层水特征

针对川西大邑地区在气体钻井中的出水问题,通过对先期4口区域探井的气体钻井水样资料对工区典型水层进行了研究,利用地层水研究新方法建立了诺瓦克相图,并根据相图对水层进行了初步预测,预测结果为钻井所证实。气体钻井中采集的水样分析资料,有水样不受钻井液、多层混合地层水影响的优点,能真实反映原生地层水的特征,可信度高;据此编制的斯蒂夫蝶形图对后续油气田开发有一定的借鉴作用,可将该图作为大邑地区标准的水化学特征图,对钻井方案制定、井身结构设计、工程故障提示有较好的指导作用。

Characteristics of fault block anticline layer water in Dayi area of west Sichuang

This paper carried on deep analysis on water issues in the gas drilling in Sichaun Dayi area. It studied the working area typical water layer based on the water data in the early 4 regions gas drilling, established Novack phase diagram using a new method of layer water, made preliminary forecast in accordance with the phase diagram of the water layer which has been confirmed by drilling. The water samples collected from gas drilling isn't easily effected by drilling fluid and mixed with multi-layers, these advantages can truly reflect the original formation water features and has high reliability. Accordingly Steve butterfly oil and gas field development map can provide a certain reference to on the follow-up, the map can be made as a standard mapthe of water chemical features in Dayi area , which provides a better guide to the development of the drilling program, casing design, engineering failures warning.