鄂尔多斯盆地靖边气田高产富集因素  

Factors influencing natural gas enrichment in Jingbian gas field,Ordos basin

作　　者：吴永平[1] 王允诚[1] 

机构地区：[1]成都理工大学能源学院,四川成都610059

出　　处：《石油与天然气地质》2007年第4期473-478,共6页Oil & Gas Geology

摘　　要：通过对靖边气田古地貌单元、构造特征及泥岩压实特征对天然气富集的单一控制因素分析,认为这3种单一因素对天然气的富集都具有一定的控制作用。要全面、准确地把握本区的天然气富集规律并划分有利区,还需展开多因素的组合分析。以岩溶古地貌和现今构造作为主导因素,将组合关系分为以下4类:1)高点组合类型;2)台缘斜坡区、构造鼻隆与古构造不同部位组合类型;3)台缘斜坡区、构造鼻翼与古构造不同部位组合类型;4)洼地、构造鼻凹与古构造不同部位组合类型。其中,以高点组合类型为最优。根据控制和影响天然气富集的各种因素,结合已有高产井地质反映特征,提出靖边气田天然气富集所必须具备的5个条件,揭示其高产富集的规律性。Single control factor analyses of the palaeogeomorphology unit, structural feature, and mudstone compaction characteristics of Jingbian gas field show that these three factors individually have some impacts upon the gas enrichment in the field. However, a comprehensive and accurate understanding of gas enrichment pattern and recognition of prospect need further analyses of the combinations of the influential factors. Taking the karst paleogeomorphology and the present structures as the predominant control factors ,four types of combinations are recognized： 1 ）structural high combinations ;2）combinations of platform edge slope and structural nose uplift with different parts of palaeostructure;3）combinations of platform edge slope and structural nose flank with different parts of palaeostructure; and 4） combinations of lowland and structural nose hollow combined with different parts of palaeostructure. Among the four types, the first one is considered to be the most favorable. By integrating various factors that control or affect the natural gas enrichment with geological characteristics of high productivity wells, five necessary conditions for gas accumulation in Jingbian oilfield are proposed to reveal the pattern of gas enrichment.

关 键 词：地貌单元 构造特征 泥岩压实 富集规律 靖边气田 

分 类 号：TE112.3[石油与天然气工程—油气勘探]