临兴气田二叠系盒2段气井产能特征及主控因素  

Productivity characteristics and main controlling factors of gas wells in P2h2 in Linxing gas field of Ordos Basin

作　　者：潘福友 PAN Fuyou(Beijing Furuibao Energy Technology Co.,Ltd.,Beijing,100176)

机构地区：[1]北京福瑞宝能源科技有限公司,北京100176

出　　处：《石油地质与工程》2023年第1期56-60,共5页Petroleum Geology and Engineering

摘　　要：临兴气田是在鄂尔多斯盆地东缘发现的大气田,主力产层是二叠系盒2段,有效储层具有“低孔、低渗、低压、低丰度、低产”且非均质性强的特点,严重制约了天然气的高效开发。为进一步提升盒2段气井产能,以“静态决定动态”为原则,从气藏地质特征出发,理清盒2段不同气井产能的差异性,进一步分析影响差异性的主控因素及其成因机理。综合研究表明,有效储层垂向厚度偏薄、砂体多期叠置发育、横向宽度发育受限、砂体横向连通性较差以及储层物性差是制约临兴气田盒2段气井产能的主要因素;受紫金山岩体后期影响的压实作用、胶结作用是导致储层物性变差的主控因素;对于“低孔、低渗、低地层压力、低丰度、低产量”型致密砂岩储层,配套有效的储层改造工艺技术,是提高气井产能的有效途径之一。Linxing gas field is a 100 billion square gas field discovered in the eastern margin of Ordos Basin in recent years, the P2h2 member of the Upper Shihezi formation in the main production layer is characterized by low porosity, low permeability, low pressure, low abundance and low production, which restricts the efficient development of natural gas.In order to further enhance the productivity, based on the principle of "statically determined dynamic state" and the geological characteristics, the differences on productivity of different gas wells have been made clear, and therefore, the main controlling factors and the formation mechanism have been analyzed.The results indicate the main factors are as the follows: small vertical thickness of effective reservoir, the development of sand bodies in multiple stages, the limited development of lateral width, the poor horizontal connectivity of sand bodies, and the poor physical properties of the reservoir.Compaction and cementation affected by the late Zijinshan period mainly lead to poor reservoir physical properties.For the tight reservoirs of "low porosity, low permeability, low pressure, low abundance and low production",the supporting reservoir reconstruction technology is one of the effective ways to improve gas well productivity.

关 键 词：临兴气田 二叠系 盒2段 气井产能 主控因素 致密储层 非均质性 

分 类 号：TE313[石油与天然气工程—油气田开发工程]