【作者】 郑小雄；

【导师】 姚军；

【作者基本信息】 中国石油大学 ， 油气田开发工程， 2007， 硕士

【摘要】 随着石油勘探和开发程度的深入,以及世界对石油需求量的迅速增长,稠油油藏的开发在石油开采中的地位变得愈加重要。目前对于储量极大的超稠油油藏,常规热采技术难以取得好的开发效果。因此,研究适用于稠油油藏特别是超稠油油藏开采的蒸汽辅助重力泄油技术及其优化设计具有十分重要的意义。本文从理论研究和数值模拟两个方面对蒸汽辅助重力泄油注采参数进行了优化并对开发效果进行了预测。理论研究先从蒸汽沿注汽井井筒的温度场、压力场以及干度的分布入手,得出一定地层条件下的最佳注入压力和注汽速度,为后续数模研究注采参数的优化提供参考。然后根据不同的油层情况,对采用蒸汽辅助重力泄油、溶剂辅助重力泄油和蒸汽辅助重力泄油加入气体驱动三种开发方式进行筛选。随后建立蒸汽辅助重力泄油的理论模型,研究原油粘温关系以及油汽界面移动速度、泄油率、泄水率等参数,为开发指标的预测提供了理论依据。同时以产油量为目标,运用正交设计方法,对各种影响蒸汽辅助重力泄油开发效果的因素进行了敏感性分析。数值模拟分别以双水平井和直井—水平井组合方式蒸汽辅助重力泄油为例,建立模型对布井参数和注采参数进行了优化,并对开发效果进行了预测。最后将数模预测结果和理论计算结果相比较,吻合情况较好,验证了数值模拟结果的可靠性和蒸汽辅助重力泄油技术开发超稠油油藏的可行性。更多还原

【Abstract】 With the increasing demand of oil and decreasing oil reserves, the exploitation of heavy crude oil reservoir becomes much more important. Seeing that conventional thermal production methods can’t get a good result, it’s very significant to study the steam assisted gravity drainage (SAGD) technology which is a very effective method in developing heavy crude oil reservoirs, especially extra heavy oil reservoirs.This article studied the SAGD technology in two ways. One was theoretical research and the other was numerical simulation. Theoretical research began with the inquiry of temperature field, pressure field and dryness fraction along the injector well. Then the screening of SAGD, vapor extraction (VAPEX), steam and gas push (SAGP) was done. After the creation of theoretical model of SAGD, the viscosity-temperature characteristic of oil, velocity of steam-oil interface, oil and water production rate were studied. Looking on oil rate as an evaluation criterion, orthogonal method was used to investigate how much that several factors influenced the development of SAGD. In the other way, numerical models were created to describe the production progress of dual horizontal wells SAGD and vertical-horizontal wells SAGD and optimize the location of wells and injection-production parameters. In the last, numerical prediction results were contrasted to theoretical calculation results and got a good match, which verified the credibility of numerical prediction results and the feasibility of SAGD applying to exploit extra heavy oil reservoirs.更多还原