摘要
针对歧口凹陷沙一下亚段白云岩储集层具有厚度薄、岩性多样化的特点,通过现场地质录井常规手段、碳酸盐岩含量分析、薄片鉴定、微钻时细分储集层等方法,解决了岩性混杂不易识别的问题,提高了现场录井对岩性的识别能力。在油气层解释评价方面,结合其储集空间的特殊性和原油物性特点,总结了气测参数曲线变化特征,分析了岩石热解谱图形态的响应特征,并分别建立了峰基比-湿度比气测解释图板和Pg-OPI、St-S2/St岩石热解解释图板。在实际生产中,该地区白云岩分布区域共实施探井18口,利用录井资料有效地识别了白云岩储集层并进行了流体性质评价,解释符合率达到77.78%,以BS 6井、B 44X1井两口井为例对应用情况进行简要介绍。
According to the dolomite reservoir of Es1lower submember in Qikou Sag has the features of thin thickness and a variety of lithologies,through on-site conventional geological logging means,carbonate content analysis,thin section analysis,subdivision of reservoirs by micro-drilling-time,the authors solved the problem that the mixed lithology is not easy to identify,thus the ability of field mud logging on lithology recognition has been improved.In the interpretation and evaluation on reservoirs,combining with its particularity of reservoir space and physical property of crude oil,the paper summed up the chang characteristics of gas logging parameter curves,analyzed the response characteristics of the rock pyrolysis spectra morphology and respectively established gas logging interpretation chart of the ratio of peak to base value and humidity ratio and geochemical logging interpretation charts of Pg-OPI,St-S2/St.In actual production,a total of18wells were implemented in the area of dolomite distribu-tion in this region,the dolomite reservoirs were efficiently identified and fluid properties were evaluated by the use of mud logging data. The interpretation coincidence rate reached 77.78%,taking Well BS 6,Well B 44X1as examples for a brief introduction of the application.
出处
《录井工程》
2013年第3期49-54,96-97,共6页
Mud Logging Engineering
关键词
歧口凹陷
白云岩
过渡岩性
气测
地化
曲线形态
图板
峰基对比
湿度比
Qikou Sag
dolomite
transition lithology
gas logging
geochemical
curve morphology
chart
the ratio of peak to base value
humidity ratio
