子洲气田北部上古气藏储层评价研究

Reservoir evaluation of the Upper Paleozoic gas reservoir in the north of Zizhou gasfield

鄂尔多斯盆地子洲气田于2003年整体勘探,2005年启动评价,2006年规模建产,2011年底建成年产能15.0×10^8m^3。为确保气田长期稳产,急需在周边寻找接替区。气田中部井网基本完善,加密空间不大;西部储层物性差且出水现象严重;东南部气水关系复杂,整体表现产水,子洲气田未来稳产方向主要为气田北部。本文从地质角度出发,针对子洲北部深入开展综合研究,对比分析神木、榆林南以及子洲差异性,制定富集区优选标准,筛选稳产接替有利区。

Zizhou gasfield in Ordos basin was explored in 2003,evaluated in 2005,built on a large scale in 2006,with an annual production capacity of 1.5 billion m^3 by the end of 2011.In order to ensure the long-term stable production of the gasfield,it is urgent to find a replacement area around.The well pattern in the middle of the gasfield is basically perfect,and the infilling space is not large.The physical properties of the reservoir in the west are poor and the water production phenomenon is serious.The gas-water relationship in the southeast is complex,and the overall performance of water production is tha.In the future,the stable production direction of Zizhou gasfield is mainly in the north of the gasfield.In this paper,from the geological point of view,in-depth comprehensive research is carried out in the north of Zizhou,comparative analysis of Shenmu,Yulin south and Zizhou differences,formulation of the optimization criteria of enrichment areas,selection of stable production to replace favorable areas.