摘要
高能气体压裂技术的核心是通过推进剂爆燃产生的瞬时（几十到几百毫秒）高温高压改造储层。为了避免在施工过程中很难测量到瞬时温度的问题,以一种常用的推进剂CP-1为例,通过分析其燃烧产物成分,结合混合气体临界参数计算方法和高温高压气体状态方程来计算井下温度,并给出了一个简单的计算公式以便运用。结果表明,推进剂产物的临界温度和临界压力之比对井下温度具有决定性的影响,在一般的施工峰值压力下井下温度分布范围为380℃～780℃,与美国提供的实测资料相近。该方法可以运用到不同种类的推进剂施工时井下温度的计算,为高能气体压裂施工套管耐温安全性的校核提供了另一种方法。
The core of high energy gas fracturing（HEGF） is to enhance reservoir properties by taking the advantage of transient（from tens to hundreds of milliseconds）high temperature and pressure produced by combustion of propellent. For the purpose of avoiding difficulties in measuring temperature, calculated it by analyzing the reaction product of propellent and combinating the equation of state for gas in high temperatures and high pressures. All the calculations were carried out by taking the most commonly used propellent CP-1 as an example and finally came out a simple equation for application. The result shows that the ratio of tagnation temperature and pressure is of crucial influence to the downhole temperature. Under the pressures of general HEGF constructions, the temperatures are between 380 ℃～780 ℃which are similar to data measured by the US. This method could be used to calculate the downhole temperature of constructions that use different kinds of propellents, provides a new method to check heat-bearing safety of casings in HEGF constructions.
出处
《石油化工应用》
CAS
2016年第4期15-17,22,共4页
Petrochemical Industry Application
基金
国家科技重大专项子课题"海上油田化学驱配套技术"
项目编号:2011ZX05024-004-09
关键词
高能气体压裂
推进剂成分
井筒温度
套管安全
high energy gas fracturing
components of propellent
downhole temperature
casing safety
