川中须家河组低渗含水气藏产量递减规律及影响因素分析  

PRODUCTION DECLINE LAW AND ITS INFLUENCE FACTORS OF LOW-PERMEABILITY WATER-BEARING GAS RESERVOIR IN XUJIAHE FORMATION,CENTRAL SICHUAN BASIN

作　　者：石美[1] 袁权[1] 张友彩[1] 欧家强[1] 胡燕[1] 张娟[2] 

机构地区：[1]中国石油西南油气田公司川中油气矿 [2]中国石油西南油气田公司勘探开发研究院

出　　处：《天然气勘探与开发》2014年第4期25-28,32,共5页Natural Gas Exploration and Development

摘　　要：川中须家河组气藏为典型低孔低渗、高含水陆相碎屑岩气藏,气藏储层具有累积厚度大,单层厚度薄,非均质性较强,连续性较差等特点。以广安、合川须家河组两个典型气藏为例,在大量调研和总结的基础上,充分利用气藏动静态资料,分析气藏(气井)产量递减规律及其影响因素:1川中须家河组气藏(气井)稳产能力极低;2气藏(气井)初期产气量递减快,整体服从减速递减规律;3产气量递减速度与储量丰度成负相关关系,与开采强度、产水量成正相关性,受井型、完井方式及改造规模等因素影响不明显。Xujiahe Formation in central Sichuan Basin,a typical low-permeability,low-porosity,high water cut,and continental clastic rock gas reservoir,is characterized by large cumulative thickness but small thickness for a single layer,strong heterogeneity,and poor continuity.We took two gas reservoirs from Guangan and Hechuan areas as examples;and analyzed the law of production decline and its influence factors.Results show that(1) the stable yield capability of gas reservoirs(gas wells) in Xujiahe Formation is pretty poor;(2) the gas production declined quickly at early stage and then the decline rate decelerated;and(3) the production decline may be influenced by reserves abundance,recovery intensity,and water producing.

关 键 词：须家河 低渗 含水气藏 递减规律 影响因素 

分 类 号：P618.13[天文地球—矿床学]