【摘要】 针对葡西地区低阻油层、高阻水层并存,油水层测井解释符合率较低的状况,根据黏土矿物分析、粒度分析、薄片鉴定及常规岩心分析资料,结合储层常规测井响应特征分析,认为细粒砂岩束缚水饱和度高、泥质砂岩伊利石体积分数大是油层电阻率低、电阻增大率低的主要成因;此外,由于钙质的存在,钙质砂岩储层的束缚水饱和度增大,纯钙质砂岩油层的电阻增大率降低,从而降低了流体识别符合率.更多还原

【Abstract】 The fact that both low resistivity oil zones and high resistivity water zones exist in Puxi area makes logging interpretation in this area more difficult. Based on clay mineral analysis、grain size analysis、thin section identification and conventional core analysis data,in combination with the analysis of log response characteristics in the paper, it shows that high irreducible water saturation in fine sand and high illite content in shaly sand are the two main causes of low resistivity and low formation resistivity index in oil zones. In addition , calcium in calcium-bearing sand zones increases irreducible water saturation, on the other hand,it reduces formation resistivity index of clean calcium-bearing oil sand zones. Therefore it reduces the correctness of fluid identification.更多还原