织金煤层气田气藏地质特征研究  

Study on Geological Characteristics of Gas Reservoir in Zhijin Coalbed Methane Field

作　　者：马伟竣[1] MA Weijun(Chongqing Shale Gas Co.,Ltd,SINOPEC East China Oil&Gas Company,Chongqing 408400)

机构地区：[1]中国石化华东油气分公司重庆页岩气有限公司,重庆408400

出　　处：《中国煤层气》2020年第3期22-26,共5页China Coalbed Methane

基　　金：国家科技重大专项资助项目(2016ZX0504);国家自然科学基金资助项目(41530314);中石化华东油气分公司局科技重点项目联合资助。

摘　　要：本文从构造、沉积、煤岩煤质、含气性、保存条件入手,详细阐述气田的气藏地质特征。研究表明织金煤层气田具有宽缓的次向斜构造、断层发育少;地层处于潮坪-三角洲-泥炭沼泽有利的成煤沉积环境;主力煤层具有"层数多、物性好、保存条件好、含气量较高、储层压力高、资源丰度高"的赋存特点。龙潭组下煤组四套主力煤层(20、23、27、30号煤层)地质条件最好,资源丰度最高,为Ⅰ类储层,中煤层2套主力煤层(16、17号煤层)和上煤组2套主力煤层(6、7号煤层)资源丰度次之,为Ⅱ类储层,综合评价气田为中型、中丰度、浅层气田。This paper expounds the geological characteristics of the Field from the aspects of structure,sedimentation,coal rock and quality,gas bearing property and preservation conditions in detail.The study shows that the structural characteristics of Zhijin Coalbed Methane Field are wide and gentle sub syncline structure with few faults.The stratum is in the favorable coal forming sedimentary environment of tidal flat–delta-lagoon.The coal seam has the characteristics of multiple coal seams,good physical properties,good preservation conditions,high gas content,high reservoir pressure and high resource abundance.According to the comprehensive evaluation of the upper,middle and lower coal group of Longtan Formation,the geological conditions of the four main coal seams(No.20,No.23,No.27,No.30)in the lower coal group are the best,with the highest resource abundance,which is class I reservoir,followed by that of the two main coal seams(No.16,No.17)in the middle coal group,and that of the two main coal seams(No.6,No.7)in the upper coal group,which is class II reservoir.The Field is evaluated to be a medium-sized and shallow gas field with medium abundance.

关 键 词：织金 煤层气 多煤层 地质特征 

分 类 号：P618.13[天文地球—矿床学]