Comparison of the Surface and Underground Natural Gas Occurrences in the Tazhong Uplift of the Tarim Basin

作     者：TIAN Jun CHEN Junqing JIAO Jiao PANG Xiongqi 

作者机构：Tarim Oilfield Company PetroChina Korla Xinjiang 841000 China State Key Laboratory of Petroleum Resource and Prospecting （China University of Petroleum） Beijing 102249 China Basin and Reservoir Research Center China University of Petroleum （Beijing） Beijing 102249 China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2010年第84卷第5期

页      面：1097-1115页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 082002[工学-油气田开发工程] 

基　　金：supported by the State Key Basic Research Program 973(No.2006CB202308) 

主　　题：Tarim basin Tazhong uplift natural gas occurrence features 

摘      要：The oil, gas and water volumes revealed by the productivity of exploratory wells do not reflect the actual underground situations. Under the geologic conditions, a certain amount of dissolved natural gas is stored in oil or water. Based on the production test data of exploratory wells in the Tazhong uplift of the Tarim basin, this paper discusses in detail the differences in occurrence and distribution featrues between the surface and underground natural gases; presents a restoration of the surface gas occurrence to actual underground geologic conditions according to the dissolubility of natural gas under different temperature, pressure and medium conditions; and classifies the natural gas into three states, i.e. the oversaturated, saturated and undersaturated, according to its relative content underground. Through a comparative analysis of the differences in surface and underground occurrences of natural gas, it discusses the hydrocarbon reservoir formation mechanism and distribution rules, thereby providing guidances as new methods and technologies for the prediction of potential natural gas reservoir distribution in the study area.