火成岩岩性识别校正方法研究

Analysis about the Source of Excessive Organochlorine in Externally Transported Crude Oil

葛红旗 谢蕾蕾 孙积悦 李天次

GE Hongqi XIE Leilei SUN Jiyue LI Tianci

长江大学油气资源与勘探技术教育部重点实验室, 湖北武汉 430100

Resources and Exploration Technology, Ministry of Education Key Laboratory of Oil and Gas, Yangtze University, Wuhan 430100, China

火成岩油气藏岩性复杂多变,录井岩性识别经常出现误差,需要利用测井方法对地层岩性进行校正。目前,岩性识别方法主要有岩心及薄片鉴定法、重磁方法、地震方法、测井方法以及地球化学方法等,其中测井识别方法是在整个研究区块内最直接可信而且简单易行的一种岩性识别校正方法。此文的岩性测井校正方法主要采用交会图法和成像测井法,校正流程主要包括岩性定名、测井曲线标准化、建立识别图版和岩性校正等步骤,依据上述流程及方法对研究区域的火成岩进行识别,识别结果与取心资料和薄片鉴定结果符合较好,达到了岩性校正的目的。因此,测井岩性校正方法及流程,对复杂储层,特别是火山岩储层测井岩性校正有普遍的借鉴意义。

The volcanic reservoir is complex and variable in lithology, and errors often occur during lithological identification with mud logging data. Therefore, it is necessary to correct lithology with well logging methods. Currently, there are five main methods for lithology identification, including core and slice identification method, seismic method, gravity and magnetic method, logging method, and geochemical method, of which, logging method is the most credible and feasible method to identify and correct lithology. In this paper, the main logging correction methods used for lithology identification are crossplot method and imaging logging method. The correction process includes lithology naming, standardization of logs, establishment of identification plates and lithology correction. We have identified the volcanic reservoirs in the study area based on the above identification process and methods. The identification results are in good agreement with coring data and rock slices identification results. Therefore, for complex reservoir, especially the volcanic reservoirs, logging method is significant for lithology identification and correction.

https://doi.org/10.3969/j.issn.1008-2336.2015.03.057