白马庙气田蓬莱镇组气藏储层特征研究

RESEARCH ON THE RESERVOIR CHARACTERISTICS OF PENGLAIZHEN FORMATIONGAS RESERVOIRS OF BAIMAMIAO FIELD

白马庙蓬莱镇气藏属构造背景上的岩性气藏,也是以次生溶孔为主的致密砂岩体次生气藏。气藏具有近常规孔隙型和非常规裂缝-孔隙型两类储层,总体上具孔径小、喉道小、孔喉配位数小、宏观缝少、微裂缝发育、孔隙结构复杂、连通性差的特征。从砂岩储集特征的研究入手,分析了气井产能差异的根本原因,提出了提高气井产能的相应对策、建议。研究表明:气藏砂体规模小但砂体多且相互叠置;单层产能低但多层射开可积少成多。因此在精细地质评价基础上,采取多气层打开、分层压裂改造、分层测试和多层合采的方法可提高气井产能。

Penglaizhen Formation Gas Reservoirs of Baimamiao field belongs to the lithological gas reservoirs in the structural background,and also tight sandstone gas reservoir.Its main pore type is solution pores.The gas reservoirs has conventional pore reservoir and the non-conventional fracture - pore reservoir,in the whole,the reservoirs have the following characteristics: small radius of pore,small throat,small coordination number,little macroscopic fracture,more micro-fracture,complex pore structure,poor connective ability.Firstly,the reservoir characteristics is studied,the reasons of the difference of the gas well production is analyzed,then proposed the suggestion that enhances the gas well production in this article.The following conclusions are drawn as follows: There are many small scale sandstone bodies in the gas reservoirs and the sandstone bodies have the mutual superposition;the single layer production is low but the multi-layer can accumulate high production.Therefore,on the basis of intensive geological evaluation,using the methods such as opening multi-layer,the selective zone fracturing,the selective zone test and the multi-layer production can enhance gas well production.