摘要
体积压裂已经成为页岩气增产的必要措施,如何评价体积压裂效果是页岩气藏提高压裂水平亟待解决的问题。在体积压裂井产能评价、压裂效果多因素影响分析、相关性分析、多元回归分析的理论基础之上,建立了压裂投产效果评价指标和压裂工艺效果评价指标,通过理论计算明确裂缝几何参数对页岩气藏压裂效果的影响程度,同时引入体积压裂井产能变化指数,建立评价方法,将压后生产动态情况综合到压裂效果评价中,并应用模糊数学方法对评价指标进行计算,解决了压裂效果评价中的地质因素和工程因素之间的矛盾。实例计算表明:数据支持系统能够满足页岩气体积压裂效果评价现场需求,应用效果较好,经济效益显著。
As a stimulation treatment, volume fracturing is very necessary for shale-gas reservoirs. How to evaluate its effect is an urgent problem. Based on productivity evaluation, anal-ysis on multifactor influencing fracturing effect, and correlation and multiple-regression analysis,the evaluation indicators of fracturing effect and fracturing technology are established. The impact of fracture geometric parameters on fracturing has been defined by theoretical calculation.Through the index of productivity changes of fractured wells, an evaluation method formes, in which the after-fracturing production performance is taken into account. And the fuzzy mathematics is applied to calculating evaluation indicators to solve some contradictions between geological and engineering factors. Results show that data support system can meet the requirement of effect evaluation of shale-gas volume fracturing. Meanwhile, significant economic benefits may be obtained.
出处
《天然气勘探与开发》
2016年第1期43-46,11-12,共4页
Natural Gas Exploration and Development
基金
中国石油天然气股份有限公司科技重大专项(2011A-1010)"新一代油藏数值模拟软件"
关键词
页岩气
体积压裂
数据库
系统
效果评价
shale gas
volume fracturing
database
system
effect evaluation
