气藏水平井产气剖面实验装置及测试方案

发布时间：2018-01-24 00:15

  本文关键词： 水平气井 实验装置 模拟 产气剖面 测试方案　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着我国对油气藏的日益开采,人们已从普通性油气藏向复杂性油气藏的方向转战,例如川东北地区普光、元坝等高含硫气田,埋藏深,开采难度大,同时开采时可能面临着含硫气体危害的风险。面对这样艰巨的挑战,针对特殊油气藏的开发,采用水平井工艺技术是一种有效手段,尤其是针对相对较薄的油气储层,能够大幅度提高油气的供给面积,进而提高产量。在采用水平井工艺的同时,学者们也不断地对水平井筒附近的储层渗流特性及水平井筒内流体的流动状态相关理论进行探索研究。数值模拟方法和物理模拟实验方法是现如今最常见的两种分析手段。本论文主要从物理模拟实验方法对气藏水平井产气剖面进行分析研究。在水平气井的开采过程中,准确掌握储层渗透率、井筒沿程压降及钻完井参数等数据对产气剖面的影响,对气藏水平井产量,开采方式的合理选择、生产过程的动态分析等方面有着重要意义。从气藏水平井产能相关理论分析,只要储层有渗透率能给井筒提供产量,但事实是否真的如此,气藏的Ⅲ类、Ⅳ类储层的渗透率非常小,特别是渗透率小于0.001mD的Ⅳ类储层是否能够给水平井筒供气,供气能力如何不得而知;所建立的气藏渗流模型是否与水平井筒近井地带储层流动特性相一致也不得而知,因此需要研发相关的物理模拟实验装置通过实验的方法对其进行验证。对于高含硫气藏来说,通过模拟的实验装置用空气代替高含硫气体进行实验,避免人员与硫直接接触,对人身安全也是一种保障。对比购买整套的实验装置,通过自行研制装置同样能够解产气剖面的相关问题,而且价格更加便宜,能够有效降低研发成本。综上所述,这些都是本论文研究气藏水平井产气剖面实验装置的意义所在。本论文的创新点:能够模拟地层的均质性、非均质性,可以模拟水平井有限导流或无限导流状态;可以根据某一特定的气藏储层情况,通过更换不同渗透率岩心或者对岩心串联等效出新的渗透率岩心、更换不同实验装置管径大小来进行模拟。
[Abstract]:With the increasing exploitation of oil and gas reservoirs in China, people have turned from ordinary oil and gas reservoirs to complex ones, such as Puguang gas fields with high sulfur content in northeast Sichuan, Yuanba gas fields with high sulfur content, which are buried deep and difficult to exploit. At the same time, it may be faced with the risk of sulfur gas hazards. In the face of such a difficult challenge, the use of horizontal well technology is an effective means for the development of special oil and gas reservoirs. Especially for the relatively thin oil and gas reservoir, it can greatly increase the supply area of oil and gas, and then improve the production. Scholars have also been exploring and studying the percolation characteristics of reservoir near horizontal wellbore and the theory of fluid flow in horizontal wellbore. Numerical simulation method and physical simulation experiment method are the two most common methods nowadays. In this paper, the gas production profile of horizontal well in gas reservoir is analyzed and studied from the physical simulation experiment method, and in the production process of horizontal gas well. The influence of reservoir permeability, wellbore pressure drop and drilling and completion parameters on gas production profile is accurately grasped, and the reasonable selection of gas reservoir horizontal well production and production mode is also given. From the theoretical analysis of the productivity of horizontal wells in gas reservoirs, as long as the reservoir has permeability to provide production to the wellbore, but the fact is that this is the case, the gas reservoir type III. The permeability of type 鈪，

本文编号：1458625