Relationship between the later strong gas-charging and the improvement of the reservoir capacity in deep Ordovician carbonate reservoir in Tazhong area, Tarim Basin

作     者：ZHAO WenZhi ZHU GuangYou ZHANG ShuiChang ZHAO XueFeng SUN YuShan WANG HongJun YANG HaiJun HAN JianFa 

作者机构：Research Institute of Petroleum Exploration and Development PetroChina Beijing 100083 China Research Institute of Petroleum Exploration and Development Tarim Oilfield Company PetroChina Korla 841000 China 

出 版 物：《Chinese Science Bulletin》 (CHINESE SCIENCE BULLETIN)

年 卷 期：2009年第54卷第17期

页      面：3076-3089页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 081404[工学-供热、供燃气、通风及空调工程] 0814[工学-土木工程] 

基　　金：Supported by the National Basic Research Program of China (Grant No. 2007CB209500) National Natural Science Foundation of China (Grant Nos: 40602016 and 40773032) 

主　　题：碳酸盐岩储层 塔里木盆地 塔中地区 煤气收费 奥陶系 天然气资源 能力 勘探前景 

摘      要：Some large-scale oil-gas fields have recently been discovered in marine carbonate in China, especially the significant discoveries in deep reservoir that reveals a favorable exploration prospect. Tazhong area is the first-order tectonic unit in Tarim Basin, where there are nearly trillion cubic meters of natural gas resources in the Ordovician limestone reef flat complex in Lianglitage Formation. The reservoir is shelf edge reef flat complex, characterized by ultra-low porosity, low permeability and strong heterogeneous, with a current burial depth of 4500―6500 m. Studies find that the formation and distribution of deep reservoir of the Lianglitage Formation were controlled not only by the early high-energy sedimentary facies and corrosion, but the fracture network formed by the strong gas-charging process since the Himalayan epoch, which played an important role in optimizing and improving reservoir properties. This paper discusses the relationship between the strong later gas-charging and the improvement of the reservoir capacity in deep Ordovician carbonate reservoir, and also builts the corresponding mechanisms and modes, which is favorable for the prediction and evaluation of the advantageous exploration targets.