新场气田须二段气藏X2井区井间连通性及开采对策  

ANALYSIS OF INTERWELL CONNECTIVITY AND PRODUCTION COUNTERMEASURE ABOUT X2 BOREFIELD IN XINCHANG T_3X^2 GAS RESERVOIR

作　　者：王旭[1] 李祖友[1] 严小勇[1] 徐广鹏[1] 

机构地区：[1]中石化西南油气分公司川西采气厂

出　　处：《钻采工艺》2011年第3期44-48,114-115,共5页Drilling & Production Technology

基　　金："十一五"国家科技攻关课题"低渗气藏特殊复杂地层高效钻井关键技术"部分研究成果(编号:2008zx05022-005)

摘　　要：综合分析了新场气田须二段气藏X2井区X851、X2、X201等6口井的地层压力变化趋势及井间排水相互影响的动态特征,认为该井区各井间是相互连通的,属统一水动力系统;X2井区水体活跃,供给较充分,据物质平衡方程,计算天然地质储量为68.8×108m3,目前水侵入量为87.2×104m3,水侵速度为389 m3/d,而目前排水量仅为3273/d,采出水量小于侵入水量,气藏存在被水淹停产的风险;据此提出在X2井区构造部位较低、产水量和地层压力均较高的X201井实施强排水,经初步排水表明,排水效果较好,建议排水规模从现在的97m3/d,增加到159m3/d,最大限度的实现井区排水量与侵入水量接近,以利于较高构造部位气井的正常生产。The formation pressure changing trend and dynamic characteristic of the interwell drainage interrelationship were analyzed in X2 borefield in Xinchang T3 X2 gas reservoir, and thought that each well was interconnected in this borefield, and they existed in the same hydrodynamic system. Based on the material balance equation, the OGIP calculated is 68.8 108m3, water influx is 87.2 104m3, water invasion rate is 389m3/d, but water discharge is only 327m3/d at present in X2 borefield, water discharge is littler than water invasion, drown out danger exist in this gas reservoir.So, the water drainage test was done through X201 well which is located in the lower formation location, and its water production and formation pressure is higher, preliminary water drainage indicated that the effect was good, and advised that water discharge increase to 159m3/d from 97m3/d nowadays, so that water discharge is as close as possible to water invasion. It was beneficial to produce normally for the wells which lie in the higher formation location.

关 键 词：新场气田 须二段气藏 地层压力 连通性 排水 水侵速度 

分 类 号：P618.13[天文地球—矿床学]