提升水驱气藏开发效果的先期控水技术

发布时间：2018-04-08 20:25

本文选题：水驱气藏　切入点：先期控水　出处：《天然气工业》2017年08期

【摘要】：活跃水驱气藏通常会因为水侵、水淹而造成开发效益降低,使得该类气藏的采收率远低于不活跃水驱气藏。为此,提出了先期控水的技术思路。其原理是对活跃水驱气藏在开发早期就采取控水措施,即在水驱气藏投入开发前,认清水体分布特征,预测水侵方向、方位及水侵量,在地层水侵入的源头利用控水井先期开展控水作业,尽量延缓气藏水淹的时间。具体方法是:在气藏发生水侵的高渗条带的来水方位上部署控水井,实施排采泄压、阻隔拦截、诱导转向,或利用水驱气藏下部的低压储层对气藏侵入水实施纵向灌注、邻层转储,以削弱侵入水的能量、改变侵入水的流向、抑制边底水的活跃性,达到减缓水侵速度、阻隔水侵路线、减少水侵面积的目的,进而提升水驱气藏的开发效果、提高水驱气藏的最终采收率。以柴达木盆地涩北气田为例,进行了先期控水技术的部署与尝试。结论认为:该项技术是与油田注水开发相似但又相反的,可实现水侵气藏均衡开采、控水稳气的保护性开发技术。
[Abstract]:The recovery efficiency of active water drive gas reservoir is much lower than that of inactive water drive gas reservoir because of water invasion and flooding.Therefore, the technical thinking of water control in advance is put forward.The principle is to take water control measures in the early stage of development of active water drive gas reservoirs, that is, to recognize the distribution characteristics of water bodies, predict the direction, orientation and amount of water invasion before the reservoir is put into development.At the source of formation water intrusion, water control operation is carried out in advance by using control wells to delay the time of gas reservoir flooding as far as possible.The specific methods are as follows: the control wells are deployed on the direction of the water coming from the high permeability belt where the water invasion occurs in the gas reservoir, so as to discharge the production pressure, block the interception, induce the turn, or make use of the low pressure reservoir in the lower part of the water drive gas reservoir to carry out longitudinal perfusion to the invading water of the gas reservoir.In order to weaken the energy of intrusive water, change the flow direction of intrusive water, restrain the activity of edge and bottom water, and achieve the purpose of slowing down the water invasion speed, blocking the water invasion route and reducing the area of water invasion, the development effect of water drive gas reservoir can be improved.To improve the final recovery of water drive gas reservoir.Taking Shibei gas field in Qaidam Basin as an example, the deployment and attempt of water control technology are carried out.The conclusion is that this technology is similar to but opposite to oilfield water injection development, and can realize balanced production of water invasion gas reservoir and control water and stable gas.
【作者单位】：中国石油青海油田公司;中国地质大学;
【基金】：国家科技重大专项(编号:2011ZX05015-004)
【分类号】：TE377

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