塔里木盆地轮西地区古岩溶洞穴型储层分布规律

Distribution rule of the palaeokarst cavernous reservoir in the west Lunnan region,Tarim Basin

由岩溶作用形成的洞穴及其相关的裂缝、溶蚀孔洞是碳酸盐岩油田高产稳产井的主要储油空间,古岩溶作用发育具有较强的非均质性,使得洞穴型储层的分布预测极为困难。以塔里木盆地轮西地区为例,开展了古岩溶洞穴型储层分布规律的研究,探讨了预测该类储层分布的测井地质方法。通过岩溶洞穴的测井识别以及岩溶相带的划分与对比,结合岩溶发育的地貌背景,指出了优质洞穴型储层的发育相带和分布区域。

The main oil/gas reservoir spaces in the wells with stable and high yields in carbonate oilfields are mainly the caverns formed by the karstification and the related fractures and corrosion vugs. Because of the stronger heterogeneity of the palaeo - karstification, predicting cavernous reservoir distribution is very difficult. Taking the west Lunnan region of the Tarim Basin as an example, distribution rule of the palaeokarst cavernous reservoir was studied, and the logging geological method for predicting this kind of reservoir distribution was discussed. Through the well - logging recognition of the karst cavern and the division and correlation of the karst facies belt, the developed karst facies belts and distribution area of the high - quality cavernous reservoir had been pointed out at the geomorpho-logic background of karst development.