阿姆河盆地东南部卡洛夫-牛津阶碳酸盐岩储层特征

土库曼斯坦阿姆河盆地卡洛夫-牛津阶碳酸盐岩地层有丰富的天然气资源,相比盆地的西北部,东南部储层特征的认识程度不高。本文利用目的层段的系统岩芯资料,开展了岩芯观察、铸体薄片鉴定、岩芯物性和储层孔、渗特征分析等实验,对储层特征进行研究。研究发现：在盆地的东南部卡洛夫-牛津阶碳酸盐岩地层中,岩石类型、沉积微相对于储层发育有着显著影响,其中生物丘与生屑滩微相最有利于储层发育;碳酸盐岩成岩作用中占主导地位的为溶蚀作用和破裂作用;综合研究区资料判定储层的储集性能主要表现为低孔-中-低渗储层。研究为盆地东南部卡洛夫-牛津阶碳酸盐岩储层评价提供一定的基础,并为该区域进一步的油气勘探提供参考。

Carbonate Reservoir Characteristics of Callovian-Oxfordian in X District of Turkmenistan

Oil and gas is abundant within carbonate stratum of the Callovian-Oxfordian stage of the Amu Darya basin.This basin is located in the Turkmenistan area.However,it＇s the one of reservoirs which are lower degree of exploration and research than the northwest in the basin.Based on the petrological analysis of the core data,slice arbitration,core physical properties,and porosity and permeability combined with the previous achievements,the characteristics of Callovian-Oxfordian reservoir in the X district Gas-Field was studied.The rock type,sedimentary facies（bioherm facies and organic bank facies） and digenesis（dissolution and fracturing）have an important beneficial effect on the reservoir development in the X district.In summary,the results show that the reservoir has low porosity and medium-low permeability.The results of this study could provide additional geological background data and provide a reference for the progressive research for others conducting studies of the reservoir of field-gas located in the X district.