河南中牟区块页岩气特征及勘探前景分析  

Characteristics of shale gas and analysis of the prospecting potential in Zhongmu block,Henean Province

作　　者：邱庆伦[1,2] 张古彬 冯辉[3,2] 张栋 张馨元 QIU Qinglun;ZHANG Gubin;FENG Hui;ZHANG Dong;ZHANG Xinyuan(Henan institute of geological survey,Zhengzhou 450001,China;Henan YuKuang Geiological Exploration Investment Co.Ltd.Zhengzhou 450053 ,China;Henan Industry and Technology Innonation Strategy Alliance of Underground Clean Energy Exploration and Development,Zhengzhou 450001,China)

机构地区：[1]河南省地质调查院,郑州450001 [2]地下清洁能源勘查开发产业技术创新战略联盟,郑州450001 [3]河南豫矿地质勘查投资有限公司,郑州450053

出　　处：《地质找矿论丛》2018年第1期70-75,共6页Contributions to Geology and Mineral Resources Research

基　　金：河南省重大科技专项"河南页岩气勘查开发及示范应用研究"项目(编号:151100311000);国土资源部第二轮页岩气探矿权项目"河南中牟页岩气勘查"(编号:GT2012YQTKQCR0020)联合资助

摘　　要：文章通过对河南中牟区块海陆过渡相太原组和山西组页岩气形成的地质条件与特征分析,认为区块构造较为简单、稳定,其海陆交互相沉积环境控制太原组和山西组页岩发育,分布广泛,富含有机质页岩厚度大,为页岩气目标层;有机碳含量w(TOC)=1.1%~3.7%,有机质类型为Ⅲ型,有机质成熟度指标镜质体反射率(Ro)>3.0%~3.8%;目标层有效孔隙度1.0%~5.0%,黏土矿物以伊利石和伊/蒙混层为主;含气量0.5~3.3m^3/t,平均1.7m^3/t。对牟页1井太原组、山西组三段采用快钻桥塞分段压裂,累计注入压裂液量5 055.9m^3,加砂量202.7m^3,三层合采求产为1 256m^3/d,标志着南华北盆地海陆过渡相页岩气勘探取得重大发现。通过地质评价和资源量计算,中牟区块太原组、山西组页岩气地质资源量较为丰富,勘探有利区面积大,具备较好的页岩气勘探前景。By analyzing geological conditions and features of shale gas formed at marine-continental transitional facies of the Taiyuan Formation and Shanxi Formation in Zhongmu block the researchers consider that structure of the block is simple and stable.The sedimentary environment of the marine-continental transitional facies controls development of the Taiyuan Formation and Shanxi Formation in which shale is widely distributed and in large thickness and contain abundant organic materials t〇(TOC)=l.1%?3.7%thus is the prospecting target.Organic matter type belongs to type HI?organic carbon content accounts for1.1%to3.7%,and the effective porosity of the shale ranges from1.0%to5.0%,the gas content is0.5?3.3m3/t,averagely1.7m3/t and the values of the R o,organic matter maturity is greater than3.0%,less than3.8%.Clay minerals are mainly Illite and mixed-layered illite/smectite.At Muye well1Taiyuan and Shanxi formations are sectionally fractured by quick drill bridge plug with fracturing fluid5055.9m3and sand202.7m3injected and total gas production of1256m3/d〇f the combined mining of three layers.This is a significant discovery in the transitional facies of the north China basins.Geological evaluation and resource calculation suggest that in Zhongmu block the Taiyuan Formation and Shanxi Formation shale are abundant with gas resources,large favorable exploration areas,and good prospects for shale gas exploration.

关 键 词：中牟区块 页岩气 地质评价 有利区 太原组 山西组 勘探展望 河南省 

分 类 号：P618.13[天文地球—矿床学] TE132.2[天文地球—地质学]