欧利坨子—黄沙坨地区沙三段火山岩录井、测井岩性鉴别方法

Identifying method for volcanic rock lithology in the segment of Sha Three with mud logging and well logging in Olituozi-Huangshatuo area

辽河坳陷欧利坨子-黄沙坨地区沙三段火山岩岩性比较混杂,难以鉴别。由于火山岩是该地区主要的油气储集层,因此火山岩的岩性鉴别工作尤为重要。为提高录井技术人员对该地区火山岩的岩性鉴别能力,从区域地质资料分析入手。在录井、测井鉴别岩性两个不同的层面进行研究,总结欧利坨子-黄沙坨地区火山岩录井特征．制定该地区块火山岩测井岩性识别标准,形成了现场录井判别与测井曲线响应特征确定火山岩岩性的方法。其实际应用效果表明,不仅可卡准粗面岩储集层界面,降低钻井工程作业风险,保护油气层,而且使完井后录井综合图火山岩岩性得以精细归位,为油田后续勘探开发研究提供了可靠的依据。

The volcanic rock lithology in the segment of Sha Three of Olituozi-Huangshatuo area of Liaohe Basin is mixed and hard to be distinguished,as the volcanic rock is the major oil reservoir of the area,it is an important work to identify the volcanic rock.In order to improve the identi- fying ability of the volcanic rock lithology for the mud log- ging operators,the paper summarized mud logging charac- teristics of the volcanic rock in Olituozi-Huangshatuo by an- alyzing the area geologic information and studying the li- thology identification from mud logging and well logging, and made the well logging lithology distinguishing standard for the area volcanic rock,formed the method to determine the volcanic lithology of wellsite mud logging distinguishing and well logging curve response characteristics.It was shown by the practical application effect that the method could not be only used to stick the trachyte reservoir bound- ary,decrease drilling engineering operational risks and pro- tect oil and gas zone,but could also be used to make the volcanic rock lithology on mud logging composite chart in order after well completion.The method provided the relia- ble bases for the future exploration and development.