论文部分内容阅读
鄂尔多斯盆地延长组延长组低阻油层大量存在,因此通过对低阻油层的成因分析,提出有效的识别方法,为各油田增产起到一定的作用。主要从低阻油层的构造背景、沉积背景、储层、粘土矿物以及成岩作用方面着手,分析其成因机理。结果表明:构造幅度低、储层物性差、粘土矿物的附加导电性以及其充填方式、压实、溶蚀和胶结作用,引起油层电阻率大幅下降。提出的主要识别方法为交会图计算自然电位。
Because of the existence of low-resistivity reservoirs in Yanchang Formation of Yanchang Formation in the Ordos Basin, an effective identification method is proposed based on the genesis analysis of low-resistivity reservoirs, which plays a certain role in increasing the production of each oil field. Mainly from the low resistivity reservoir’s tectonic setting, sedimentary background, reservoir, clay minerals and diagenesis aspects, analyze its genesis mechanism. The results show that the low resistivity of the reservoir is caused by the low tectonic amplitude, poor reservoir physical properties, additional conductivity of clay minerals, filling methods, compaction, dissolution and cementation. The main method of identification proposed is to calculate the natural potential for the cross plot.