定北地区盒1-1亚段盖层评价及对含气性影响  

Evaluation of caprock for He 1-1 sub member in Dingbei area and influence of gas bearing property

作　　者：赵荣华[1] ZHAO Ronghua(Research Institute of Exploration and Development of North China Oil-Gas Branch of Sinopec,Zhengzhou Henan 450006,China)

机构地区：[1]中国石化华北油气分公司勘探开发研究院,河南郑州450006

出　　处：《石油化工应用》2021年第2期81-85,共5页Petrochemical Industry Application

基　　金：国家科技重大专项“低丰度致密低渗油气藏开发关键技术”,项目编号:2016ZX05048。

摘　　要：通过开展地质、测井资料综合研究,建立定北地区盒1-1气层的直接盖层封盖能力评价标准,对泥岩盖层的矿物组分、砂质含量、厚度、气储比、排替压力等参数进行分类评价,通过对其进行等级划分,赋存权值,将本区局部直接盖层分为三类,一类、二类泥岩盖层的分布多位于工业气流或低产气流区,与该研究区地质条件基本吻合,说明在盒1-1亚段内产气井分布上也起到一定的封堵作用,对定北气田保存起着重要作用。为研究直接盖层的分布特征对含气性的影响,建立与盒1-1气层的直接盖层和含气饱和度的相关性,结果表明:砂岩含气饱和度与上覆泥岩盖层的厚度、自然伽马、声波时差之间存在正相关关系。Through the comprehensive study of geological and logging data,the evaluation standard of direct caprock sealing ability of He 1-1 gas reservoir in Dingbei area is established.The mineral composition,sand content,thickness,gas reservoir ratio,displacement pressure and other parameters of mudstone caprock are classified and evaluated.The distribution of class I and II mudstone caprocks is mostly located in the industrial gas flow or low production gas flow area,which is basically consistent with the geological conditions of the study area.It shows that the distribution of gas wells in He 1-1 sub member also plays a certain role in plugging,and plays an important role in the preservation of Dingbei gasfield.In order to study the influence of the distribution characteristics of direct caprocks on gas bearing property,the correlation between the direct caprock and gas saturation of He 1-1 gas reservoir is established.The results show that there is a positive correlation between the gas saturation of sandstone and the thickness of overlying mudstone caprock,natural gamma and acoustic logging.

关 键 词：直接泥岩盖层 鄂尔多斯盆地 盒1-1亚段 

分 类 号：TE132[石油与天然气工程—油气勘探]