低渗透薄层碳酸盐岩气藏水平井地质导向技术  

GEO-STEERING TECHNOLOGY FOR HORIZONTAL WELLS IN LOW-PERMEABILITY AND THIN CARBONATE GAS RESERVOIR

作　　者：刘海锋[1,2] 薛云龙[1,2] 张保国[1,2] 何鎏[1,2] 夏勇[1,2] 

机构地区：[1]中国石油长庆油田公司勘探开发研究院 [2]"低渗透油气田勘探开发国家工程实验室".中国石油长庆油田

出　　处：《天然气勘探与开发》2013年第2期77-80,89,共4页Natural Gas Exploration and Development

摘　　要：靖边气田下古生界马五1+2气藏具有典型的低渗、低孔特征,主力储层马五13厚度薄、横向非均质性强,且小幅度构造变化快。水平井地质导向面临小层判识难、地层倾角预测难、气层追踪难、控制轨迹难等"四难"问题。综合运用现场录井、钻井资料,根据目的层上下部地层接触关系,确定了5处靶点调整时机,4种入靶地层对比方法,3种水平段轨迹控制方法,保证了薄储层水平井精确入靶,提高了水平井有效储层钻遇率。Lower Paleozoic Ma 51+2 gas reservoir in Jingbian gasfield is characterized by low permeability and porosity.Its main reservoir,Ma513,is featured by thin thickness,strong lateral heterogeneity and fast changes in low-amplitude structure.There are four difficulties occurring in geo-steering of horizontal well,including thin-layer identifying,formation-dip predicting,gas-zone tracing and trajectory control.Based on mud-logging and drilling data,according to the contact relation between upper and lower layers of target bed,this paper determines the timing of adjustment for five targets,four comparison methods for target-entering bed,and three methods for trajectory control of horizontal section.These may guarantee the target-entering accuracy and raise the drilling-encountering ratio of effective reservoir.

关 键 词：水平井 地质导向 轨迹控制 靖边气田 薄层 

分 类 号：TE348[石油与天然气工程—油气田开发工程]