东营凹陷深层砂砾岩岩性测井综合识别技术

Logging Comprehensive Identification Technology of Deep Sandy Conglomerate Lithology,Dongying Sag

深层砂砾岩成分结构复杂,对岩性识别一直存在着很大难度。利用岩心刻度FMI成像,成像岩性识别刻度常规测井,总结不同岩性在常规测井曲线上的响应特征,进行测井-岩性敏感性分析,选取对岩性敏感的曲线进行岩性识别,所建立的岩性识别曲线LIC能很好地反映岩石粒序的变化,经岩心和成像岩性识别结果刻度,得到了不同岩性的LIC划分标准。东营凹陷深层砂砾岩油藏的实际应用表明,LIC的岩性识别结果具有较高的符合率,其中砂砾岩的符合率在83%以上,为储层测井评价奠定了基础,同时也为复杂岩性的识别提供了一种思路和方法。

Because of complicated component structures of deep sandy conglomerate, it is difficult to identify its lithologies. FMI imaging log is calibrated by core data, and conventional log is cali- brated by imaging lithology identification. Summarized are the response characteristics of logging curves of different lithologies on conventional curves. Then analyzed is the sensitivity between curves and lithology, and selected are the sensitive curves to identify lithologies. Established is the lithology identification curve which can reflect the changes of rock grades. Through the cali- bration of core and imaging identification result, the LIC classification criterion of different li- thologies is concluded. Practical applications of deep sandy conglomerate lithology in Dongying sag show that the LIC lithology identification result has very high coincidence rate, sandy con- glomerate coincidence rate reaches 83%. It establishes a good base for reservoir logging evaluation and provides a thinking and method for complicated lithology identification.