Effect of Faulting on Ordovician Carbonate Buried-Hill Reservoir Beds in Hetianhe Gas Field, Tarim Basin  

作　　者：吕修祥 白忠凯 李建交 汪伟光 付辉 王清华 

机构地区：[1]Faculty of Natural Resource & Information Technology, China University of Petroleum [2]State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum [3]Prospecting Department of Tarim Oilfield Company, PetroChina

出　　处：《Journal of China University of Geosciences》2008年第6期625-635,共11页中国地质大学学报（英文版）

基　　金：supported by the National Basic Research Program of China (No. 2005CB422108);the National Natural Science Foundation of China (No. 40672092)

摘　　要：Ordovician carbonate buried-hill reservoir beds in the Hetianhe （和田河） gas field, located in the Mazhatage （玛扎塔塔） structural belt on the southern margin of the Bachu （巴楚） faulted uplift, southwestern Tarim basin, were studied. Based on field survey, core and slice observation, the general characteristics of carbonate buried-hill reservoir beds and specifically Ordovician carbonate buried-hill reservoir beds in the Hetianhe gas field were discussed. The karst zone of the reservoir beds in Hetianhe gas field was divided into superficial karst zone, vertical infiltration karst zone, lower subsurface flow karst zone, and deep sluggish flow zone from top to bottom. The effects of faulting on Ordovician carbonate buried-hill reservoir beds in the Hetianhe gas field were obvious. The faulting intensified the karstification and increased the depth of denudation. Faulting and subsequent fracture growth modified the reservoir beds and improved the physical property and quality of the reservoir beds. Moreover, faulting enhanced the development of the dissolution holes and fractures and increased the thickness of the effective reservoir beds. Meanwhile, faulting made the high porosity-permeability carbonate belts, which created conditions for the hydrocarbon accumulation, develop near the fault zone.Ordovician carbonate buried-hill reservoir beds in the Hetianhe （和田河） gas field, located in the Mazhatage （玛扎塔塔） structural belt on the southern margin of the Bachu （巴楚） faulted uplift, southwestern Tarim basin, were studied. Based on field survey, core and slice observation, the general characteristics of carbonate buried-hill reservoir beds and specifically Ordovician carbonate buried-hill reservoir beds in the Hetianhe gas field were discussed. The karst zone of the reservoir beds in Hetianhe gas field was divided into superficial karst zone, vertical infiltration karst zone, lower subsurface flow karst zone, and deep sluggish flow zone from top to bottom. The effects of faulting on Ordovician carbonate buried-hill reservoir beds in the Hetianhe gas field were obvious. The faulting intensified the karstification and increased the depth of denudation. Faulting and subsequent fracture growth modified the reservoir beds and improved the physical property and quality of the reservoir beds. Moreover, faulting enhanced the development of the dissolution holes and fractures and increased the thickness of the effective reservoir beds. Meanwhile, faulting made the high porosity-permeability carbonate belts, which created conditions for the hydrocarbon accumulation, develop near the fault zone.

关 键 词：Tarim basin Hetianhe gas field carbonate buried hill FAULTING reservoir bed. 

分 类 号：P618.13[天文地球—矿床学]