摘要
针对东濮凹陷油气藏的重要标志层——盐膏岩,在PDC钻头条件下与粉砂岩岩屑不易识别的问题,从PDC钻头的破岩机理、盐膏岩的地质录井特征,以及盐膏岩与粉砂岩的组成成分和物理化学性质入手,总结出稀盐酸、氢氟酸滴试、微观对比和岩屑加热结晶四种不同的粉砂岩与岩屑岩鉴别方法,拓展现场录井岩性识别方法,为录井人员准确卡准层位增加了判别依据,提高了异常预报准确性,为安全钻井提供技术支持。
In view of the problem that the important symbol layer salt cream rock of lower-lying reservoir in Dongpu oilfields is difficult to be distinguished from the sihstone detritus under the condition of drilling bit PDC, an exploration began with the mechanism of breaking rock of drilling bit PDC, the geological log characteristics of salt cream rock, the component ingredients of the salt cream rock and siltstones and their physical and chemical property. Then four different identification methods of siltstones and detritus rock are summarized, which include the titrations test of weak hydrochloric acid and hydrofluoric acid, micro contrast and the heating crystallization of detritus. All methods extend the identification method of rock property in the logging field, and also provide judging basis for logging staffs to aim at layer accurately, and finally raise the accuracy of unusual prediction and offer technical support for safe drilling.
出处
《石油工业技术监督》
2008年第9期34-37,共4页
Technology Supervision in Petroleum Industry
关键词
复合钻井
岩屑
录井质量
compound rock
detritus
logging quality
