钻井现场有机地球化学录井与油气识别评价技术

在现场钻进过程中，尤其是在油基泥浆及各种添加剂烃类污染、地质录井难以确定真假油气显示的情况下，有机地球化学录井对确定油气显示有独特的作用。但由于其烃类污染对岩屑罐顶气、岩石冷溶烃、岩石热解等常规地球化学录井技术有不同程度的影响，其检测数据通过校正污染后才能用于含油气性评价。为此，在现场开展了钻井泥浆及各种添加剂中烃类有机地化检测试验，对泥浆中轻烃（C1－C12）、萃取烃（C1－C35）和岩石冷溶烃进行动态检测，研究其烃类组成及变化特征，对钻进中真假油气显示、油气层质量及产能大小、油气烃类母质类型、储油层确定等及时作出解释与评价，为油气勘探与开发快速提供地球化学依据。

Recognization and evaluation of oil and gas with organic geochemical logging technique in drilling

In drilling, when hydrocarbons are contaminated by oil base mud and all kinds of additives, it is difficult to recognize show of oil and gas withgeological logging. Organic geochemical logging can do it effectively. Because the general techniques of geochemistry logging, such as analysis of cutting gas,dissoluble rock hydrocarbons and rock pyrolysis can be disturbed by contamination of hydrocarbons, the contamination must be deducted before the data are used to evaluate oil and gas. Therefore, tests of organic geochemistry on hydrocarbons in drilling mud and all kinds of additives are conducted. The dynamic detection of C1-C12 of light hydrocarbons in drilling mud, C1-C35 of extraction hydrocarbons and dissoluble rock hydrocarbons is conducted, and the variation of thehydrocarbon compositions is studied. Timely explanation and evaluation are madeon show of oil and gas, quality of oil gas bed and production ability, type of parent material of hydrocarbon and confirmation of oil bed. Organic geochemical logging technique in drilling can provide rapidly geochemistry data for exploration and exploitation of oil and gas.