CAJ | 학술논문

南堡凹陷部分油层电阻率较低,分布面积广泛,纵向上与高电阻率油气层、高电阻率水层间互发育,在测井特征上具有复杂和隐蔽特性,电阻率测井反映出较大的局限性.以自然电位形成机理和岩石物理试验为基础,开展了薄膜电位与阳离子交换量和岩心含水饱和度等物理量之间的关系研究,明确了自然电位极性和异常幅度与地层水矿化度、含油饱和度、阳离子交换量之间的对应关系,提出了基于合理设计钻井液电阻率为前提、利用自然电位极性和异常幅度为定性解释基础、以双视地层水电阻率比值为定量解释指标的隐蔽油气层识别方法.实例表明,在电阻率-孔隙度测井油气层识别体系中,自然电位信息的应用大大增强了对低电阻率、低电阻增大率等油气层的识别能力,在隐蔽油气层识别技术中发挥了重要作用.
남보요함부분유층전조솔교저,분포면적엄범,종향상여고전조솔유기층、고전조솔수층간호발육,재측정특정상구유복잡화은폐특성,전조솔측정반영출교대적국한성.이자연전위형성궤리화암석물리시험위기출,개전료박막전위여양리자교환량화암심함수포화도등물리량지간적관계연구,명학료자연전위겁성화이상폭도여지층수광화도、함유포화도、양리자교환량지간적대응관계,제출료기우합리설계찬정액전조솔위전제、이용자연전위겁성화이상폭도위정성해석기출、이쌍시지층수전조솔비치위정량해석지표적은폐유기층식별방법.실례표명,재전조솔-공극도측정유기층식별체계중,자연전위신식적응용대대증강료대저전조솔、저전조증대솔등유기층적식별능력,재은폐유기층식별기술중발휘료중요작용.
.Some of oil layers in Nanpu depression have low resistivity and distribute widely in the region, alternatively with high resistivity oil and water layer. Complexity and concealment are the characteristics of this kind of layer during logging. It is difficult to describe them only by resistivity. Based on formation mechanism of spontaneous potential and rock physical experi-ments, the relations between membrane potential and physical properties were studied, such as cation exchange capacity and water saturation, etc. The relations among spontaneous potential polarity, abnormal amplitude, reservoir water salinity, oil saturation, cation exchange capacity have been understood. Recognition method for blind zone was proposed, which is based on reasonable design of mud resistivity, taking spontaneous potential-abnormal amplitude as qualitative explanation base, and double apparent resistivity ratio of reservoir water as interoperation index. A lot of application cases show that, the application of spontaneous potential information improved the recognition of low resistivity layer in resistivity-porosity logging system, and has an important effect on recognition of blind zone.