长水平段碳酸盐岩弱气显示录井解释实践——以建南构造建35-5井为例

长水平段弱气显示储层的录井精细解释评价是录井解释人员致力解决的难题。利用钻时比值储层判别图版、钻时比值-烃对比系数交会图、储层孔隙度-含烃(水)饱和度交会图和多参数雷达图与云模型评价方法、产能预测模型等碳酸盐岩弱气显示录井识别与定量解释评价技术,在建南气田产能建设重点井-建35-5井进行了首次应用试验,并取得3项新认识:钻井液液柱与地层间压差过大、储层致密及井漏是造成弱显示的主要原因;对长水平段非均质性气测异常显示层,选择多个有代表性的局部井段进行解释评价,解释结果可代表整段解释结论;碳酸盐岩弱气显示录井识别与定量解释评价技术适用于长水平段弱气显示解释评价。

On Practice of Logging Interpretation for Weak Gas Show of Carbonatite in Long Horizontal Section

Evaluation on fine logging interpretation for the show of reservoir weak gas in the long horizontal section is a difficult problem for the logging interpreters to overcome. With the help of a series of methods and techniques, Jiarman Gas Field conducts first application test on Jian 35--5 Well which belongs to one of important wells in pro- ductivity construction and gets to know that overlarge differential pressure between drilling fluid column and layers, compact reservoir and the leakage are the main causes of weak gas show, that It is allowable to use the evaluation re- sults of the interpretation of multiple typical partial segments selected as a conclusion of the whole long horizontal section where there is an abnormal show layer during heterogeneous gas logging, and that logging identification of the show of carbonatite weak gas and evaluation technique through quantitative interpretation are suitable for evalua- ting the interpretation for weak gas show in the long horizontal section.