西安石油大学学报（自然科学版）2017，Vol.32Issue(4)：86-92,97,8.DOI:10.3969/j.issn.1673-064X.2017.04.015
裂缝性稠油油藏幂律流体蒸汽吞吐水平井压力动态分析
Dynamic Pressure Analysis of Steam Huff-puff Horizontal Well in Fractured Power-law Heavy Oil Reservoir
摘要
Abstract
According to the developing characteristics of naturally fractured reservoir,the power-law characteristic of heavy oil and the fluid distribution features during the steam huff-puff process of horizontal well,the heavy oil reservoir exploited by horizontal well is divided into two regions:steam swept region and heavy oil region,and the mathematical models for the seepage of fluid in two regions are established separately.In the steam swept region,fluid is Newtonian fluid and its flow is in accordance with Darcy's law;in the heavy oil region,fluid flow is non-Darcy flow and in accordance with power function law.The mathematical models were solved by using Laplace transformation and Fourier finite cosine integral transformation,the Laplace space solution of bottom-hole pressure was obtained,and the Laplace space solution was converted into real space solution using Stehfest numerical inversion.The study shows that:the dynamic pressure of steam huff-puff horizontal well in the fractured heavy oil reservoir is complicated,and fluid flow may consist of 9 stages in the case of limit;when the pressure is propagating in the Newton fluid region (inner region),the pressure derivative curve of radial flow stage is a horizontal line;when it is propagating in power-law fluid region (outer region),the pressure derivative curve of radial flow stage is parallel inclined straight lines,whose slope is determined by the power-law exponent.关键词
裂缝性油藏/双重介质/稠油/幂律/水平井/压力动态Key words
fractured reservoir/dual media/power function law/heavy oil/horizontal well/pressure performance分类
能源科技引用本文复制引用
吴明录,徐思南,丁明才,姚军..裂缝性稠油油藏幂律流体蒸汽吞吐水平井压力动态分析[J].西安石油大学学报（自然科学版）,2017,32(4):86-92,97,8.基金项目
长江学者和创新团队发展计划资助“复杂油藏开发和提高采收率的理论与技术”(编号:IRT1294) （编号:IRT1294）
