基于水电相似原理的致密油水平井压后产能相似模拟
Similarity simulation of tight oil horizontal well post-fracturing productivity based on principle of hydropower similarity
纪国法 1刘志起 1赵文伟 2南晨阳1
作者信息
- 1. 长江大学 非常规油气省部共建协同创新中心,武汉 430100;长江大学 湖北省页岩气工程技术研究中心,武汉 834000
- 2. 川庆钻探工程有限公司井下作业公司,成都 610000
- 折叠
摘要
为明确实际生产中水平井压后产能与生产压力的潜在联系,基于水电相似原理的水电模拟实验平台,模拟研究不同输入压力下水平井压后产能的变化规律.结果表明:致密油生产压力从模型边界到裂缝中心处压力呈下降趋势,且横向下降趋势比纵向下降趋势更为明显;随着压后生产进行,电压不断下降,相同地层位置的压力随着输入电压的下降而逐渐下降,模拟电压越大其等压线数值的变化幅度越大,但等压线整体分布规律受影响较小,稳定性较强;整体来看,致密油压后产能随生产压差的增大而增加,但在同等电压增量下产能的增速和增量将逐渐变缓.该研究方法可为致密油水平井压后产能预测提供新思路.
Abstract
This paper aims to clarify the potential relationship between the productivity after fractu-ring of horizontal wells and production pressure in practical work.The study builds a hydro-power simula-tion experimental platform based on the principle of hydro-power similarity to simulate and analyze the changing law behind the productivity after fracturing of horizontal wells under different input pressures.The results show that the production pressure of tight oil decreases from the boundary of the model to the center of the fracture,and the horizontal downward trend is more demonstrable than the vertical downward trend.As the production proceeds after pressing,the voltage continuously decreases,and the pressure at the same formation position gradually decreases with the decrease of input voltage,and the larger the sim-ulated voltage is,the greater the amplitude of change in the value of the isobars is,with the less effect and strong stability on overall distribution of the isobars.On the whole,the productivity after fracturing of the tight oil increases with the increase of pressure difference,but under the same voltage increment,the capacity growth and increment gradually slow down.This research method can provide a new idea for the productivity prediction of tight oil after fracturing.
关键词
致密油/水平井产能/水电相似实验Key words
tight oil/horizontal well production capacity/hydroelectric similarity experiment引用本文复制引用
基金项目
国家自然科学基金(51804042)
油气资源勘探技术教育部重点实验室(长江大学)青年创新团队项目(PI2021-04)
出版年
2024
国家科技期刊平台
NSTL
万方数据