龙虎泡油田井筒沉砂规律研究

发布时间：2018-02-14 16:46

本文关键词： 出砂机理防砂技术垂直井筒形状系数沉降规律　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：对于疏松砂岩油藏,油井出砂是影响其开采的突出问题。目前进行油井防砂是解决出砂问题来维持油井生产的重要手段。但是对于一些出砂比较严重的疏松砂岩油藏,尽管采用了防砂措施,仍然无法避免油井出砂的问题。随着生产的进行,当一定粒径和浓度的砂粒随地层流体进入井筒后,如果此时油井的产量足够高,砂粒就会随着地层流体被携带出井口。相反,如果此时产量较低,砂粒无法被携带出去,就会逐渐堆积到井底。随着堆积量的逐渐增加,就会引起油层埋砂、油管砂堵,严重时会使井底坍塌,损坏套管,影响油井的正常生产。因此,在无法完全避免油井出砂的情况下,我们有必要对砂粒在地层流体中的沉降规律进行研究。本文针对龙虎泡油田部分区块出砂严重的问题,主要完成了以下三方面工作:(1)通过室内实验,对现场所取样品的砂粒粒径、含量、含水原油流变性以及含砂浓度进行了测定,确定了各区块砂粒粒径、含量以及含砂浓度的主要范围。(2)通过模拟现场出砂,建立了室内物理实验模型,得出了不同区块砂样的形状系数。(3)通过井筒内动态沉砂规律实验研究,确定了不同粒径砂样在不同流量、含水率以及砂粒浓度下的沉降规律,建立了描述砂粒运动状态的模型。
[Abstract]:For loose sandstone reservoir, well sand production is a prominent problem affecting its production. At present, sand control is an important means to solve the sand production problem to maintain oil well production. However, for some loose sandstone reservoirs with serious sand production, In spite of the sand control measures, the problem of sand production can not be avoided. As production goes on, when a certain size and concentration of sand particles flow into the wellbore, if the oil well output is high enough at this time, Sand particles will be carried out from the wellhead with the formation fluid. On the contrary, if the production is low and the sand particles cannot be carried out, they will gradually accumulate to the bottom of the well. As the amount of accumulation increases, it will lead to reservoir burying sand and tubing sand plugging. In severe cases, the bottom hole collapses, the casing is damaged, and the normal production of the well is affected. Therefore, if the sand production of the well cannot be completely avoided, It is necessary for us to study the settling rule of sand particles in formation fluid. Aiming at the serious problem of sand production in some blocks of Longhubao Oilfield, this paper has mainly completed the following three aspects of work: 1) through laboratory experiments. The grain size, content, rheological property of water-bearing crude oil and sand concentration of the samples taken in the field were determined. The grain size, content and the main range of sand concentration in each block were determined. An indoor physical experimental model was established, and the shape coefficient of sand samples in different blocks was obtained. Through the experimental study of dynamic sand settling law in wellbore, the settlement law of sand samples with different particle size under different flow rate, water content and sand concentration was determined. A model is established to describe the movement of sand particles.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE358.1

【参考文献】