屏蔽暂堵材料对建南气田录井的影响及校正研究

EFFECTS OF SHIELDING TEMPORARY PLUGGING MATERIAL ON MUD LOGGING OF JIANNAN GASFIELD AND ITS CALIBRATION

建南气田开发时间长,地层压力较低,为保护目的气层,在钻探开发井过程中常加入屏蔽暂堵材料,通过研究建南气田典型开发井屏蔽暂堵前后气测色谱数据的变化规律,提出屏蔽暂堵材料对气测影响具有双面性:屏蔽暂堵降低气测基值有利于发现新显示层,但降低气测后效值不利于使用后效数据进行多井对比。初步建立起气测后效数据校正技术,并在建评12侧1井和建35-5井进行校正后解释,应用获得成功。

There exists lower formation pressure due to a long-period development in Jiannan gasfield.To protect target strata,a material of shielding temporary plugging is often used for drilling development wells.Studying the variation law of gas-logging chromatography data before and after shielding temporary plugging in typical development wells,this paper presents that the effects of the material on gas logging include:(1) shielding temporary plugging reducing the basic value of gas logging is helpful to new display-layer detecting;(2) the reduced aftereffect-value of gas logging is unfavorable to multi-well correlation.Meanwhile,an aftereffect-data calibration technology is established and also applied successfully to Jianping 12-1 and Jian 35-5 wells.