摘要
体积压裂技术是非常规气藏后期改造的关键技术之一。苏里格气田属于致密砂岩气藏,为了实现水平井高效开发,提高气藏最终采收率,以苏53区块为例,以体积压裂适用的基本地质条件为依据,对苏里格地区水平井体积压裂适用性进行分析。同时,借用数值模拟方法,对水平井采用不同压裂改造方式进行模拟对比。结果表明:①苏里格气田储层具有微裂缝较发育、渗透率低、石英含量高等地质特征,满足体积压裂改造的基本储层条件;②通过模拟结果对比,苏里格气田水平井实施体积压裂效果明显优于常规压裂。另外,利用裂缝监测技术、FAST和TOPAZE软件等对2012年实施的5口体积压裂水平井进行了效果分析,认为:①体积压裂水平井平均单井加砂量、液量、裂缝条数等参数明显优于常规压裂水平井;②体积压裂水平井初期平均日产气约为12×104 m3,平均无阻流量、动储量分别为77.9×104 m3/d、1.75×108 m3,均为动态Ⅰ类井。
In recent years, the stimulated reservoir volume becomes one of key transformation technologies for unconventional gas reservior. Sulige gas field is a tight sandstone gas reservoir. In order to reaIize high effective development for horizontal well and improve ultimate recovery of the gas reservoir, based on basic geological conditions for stimulated reservoir volume, the appli- cability of stimulated reservoir volume was analyzed for horizontal well in Su53 block of Sulige gas field. Meanwhile, different fracturing transformation ways used in horizontal wells were con- trasted by numerical simulation method. There were two results： firstly, the main characteristics of the reservoir were low permeability, microfracture, high quartz content and so on, which are main reservoir conditions for stimulated reservoir volume. Secondly, the result of numerical sim- ulation shows that the effect of stimulated reservoir volume was better than normal fracture. In addition, this paper analyzed the stimulated reservoir volume effect of five horizontal wells in 2012 by fracture monitoring technique, namely FAST software and TOPAZE software. The re-suit showed that fracture parameters of stimulated reservoir volume were better than normal frac- ture. All horizontal wells were first class wells, whose average daily production was 12×10^4 m^3/ d in the early days; the average capacity of open-flow was 77.9×10^4m3/d, and average dynamic reserve was 1.75×10^8 m3.
出处
《石油与天然气化工》
CAS
CSCD
2013年第4期382-386,共5页
Chemical engineering of oil & gas
基金
国家重大专项"大型油气田及煤层气开发"(2011ZX05058)
关键词
体积压裂
采收率
水平井
苏里格气田
非常规气藏
stimulated reservoir volume, recovery factor, horizontal well, Sulige gas field, unconventional gas reservior
