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测井是储层流体性质识别的重要方法。玛湖凹陷三叠系百口泉组是特低孔低渗的砂砾岩储层,对于该类非常规储层流体性质识别,采用常规的测井资料解释方法无法满足要求。因此通过对玛湖凹陷三叠系百口泉组的储层流体性质研究,结合储层特征以及实际井组的测井和试油资料,利用异常侵入特征定性识别法和多因素流体识别法,能够较为准确的识别储层流体性质。研究结果表明,对M131井区内的11口探井统计分析,有7口井为油层,4口井为水层,利用异常侵入特征定性识别法,流体识别符合率在90%以上;采用多因素流体识别法现场测井解释符合率由原来的40%提高到86%以上,为低渗储层流体定性识别提供了新的方法。
Logging is an important method to identify reservoir fluid properties. The Triassic Baikouquan Formation in the Mahu Sag is a sandstone reservoir with ultra-low porosity and low permeability. For the identification of fluid properties of unconventional reservoirs in this area, conventional logging data interpretation methods can not meet the requirements. Therefore, based on reservoir fluid properties of the Triassic Baikouquan Formation in the Mahu sag, combined with reservoir characteristics and well logging and test oil data of the actual well group, by using the qualitative identification of abnormal intrusion features and the multi-factor fluid identification method, It can identify reservoir fluids more accurately. The results show that for the 11 wells in the M131 well, 7 wells are oil reservoirs and 4 wells are water layers. The coincidence rate of fluid identification is above 90% The accuracy of on-site log interpretation of fluid identification method was improved from 40% to 86%, providing a new method for qualitative identification of low permeability reservoir fluids.