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现有气测录井技术所使用的烃类气体来源主要是使用电动脱气器分离钻井液中的烃类组分,将其混入空气送入气相色谱检测,主要得到的是C1—C5气态烃组分。这种方式一方面受钻井液的影响,另一方面由于空气含量的不确定性,只能定性地评价油气显示。半透膜对烃类组分具有一定的分离选择性,可以直接插入钻井液进行油气分离,能得到气态和常温呈液态的烃类组分,相对于电动脱气器具有受影响因素少,能定量评价油气含量的优点。因此,在气测录井技术中,为了提供定量烃类气体来源,通过对半透膜气体分离技术的研究,研制了适合要求的半透膜以及基于半透膜的油气分离装置。对这种分离装置的响应时间、分离效率、衰减检测、C1—C8(包括苯、甲苯)组分响应等性能的试验结果证明,其适用于钻井现场的油气检测,扩展了油气检测内容,丰富了油气评价信息。
Hydrocarbon gas sources used in existing gas logging technology are mainly used to separate the hydrocarbon components in the drilling fluid by using an electric degasifier and mix them into the air for gas chromatographic detection. The main hydrocarbon gas obtained is C1-C5 gaseous hydrocarbon Component. This method, on the one hand, is affected by the drilling fluid and, on the other hand, due to the uncertainty of the air content, can only be qualitatively evaluated for oil and gas displays. Semipermeable membranes have certain separation selectivity for hydrocarbon components, can be directly inserted into the drilling fluid for oil and gas separation, to be able to get gaseous and liquid hydrocarbon components at room temperature, relative to the electric deaerator with less affected, can The advantages of quantitative evaluation of oil and gas content. Therefore, in the gas logging technology, in order to provide a quantitative source of hydrocarbon gas, semipermeable membrane and semi-permeable membrane-based oil-gas separation device have been developed through the research of semi-permeable membrane gas separation technology. The test results on the response time, separation efficiency, decay detection and response of C1-C8 (including benzene and toluene) components of this separation device prove that it is suitable for the detection of oil and gas in the drilling site, expanding the content of oil and gas detection, enriching Oil and gas evaluation information.