低渗油藏高压注水参数优化研究

发布时间：2018-04-20 03:25

本文选题：低渗油藏 + 高压注水　；参考：《长江大学》2017年硕士论文

【摘要】：低渗油藏高压注水一直是油田增产、稳产的重要措施,低渗油藏的地质特征决定了注水的方式是必须采取高压注水的方式进行。究其原因,第一方面是由于低渗油藏的渗透率低,地质条件相对较差,存在一定的启动压力;第二个方面,在油藏的开发过程中,由于油气的不断开采到地面,地层能量会释放出来出现地层能量亏空,因此需要通过高压注水才能及时的补充地层能量。现阶段主要是通过高压注水来增加油藏的可采储量,提高低渗油藏的采收率,改善油藏的注水效果。本文主要针对我国低渗透油田的注水开发的注水参数进行深入的探究。孔隙系统的孔道很细微是低渗透多孔介质的显著特点。为了提高高压注水的效率,本文通过采用室内实验与理论研究相结合的方法,从高压注水的水质、高压注水的注入量、高压注水的压力等几个方面的参数做了详细深入的研究,形成了一套关于低渗油藏高压注水参数优化的方法研究。在低渗油藏的开发中,有很多油藏地层能量不足,只有通过高压注水的方式才能很好的补充地层能量,让地层充分的吸收水分,获得充足的开发能量。然而我们在注水的过程中,会遇到很多问题,比如,注入水水质的问题,注入量的影响,泥岩蠕变对套管的影响,以及应该让注入压力保持在什么范围内才能最好的保护套管等问题。本文主要是从低渗油藏高压注水的地质情况开始入手,结合吐哈油田W区的地质特征进行研究。分析研究了低渗油藏高压注水注入参数的优选问题,主要从低渗油藏注入水水质、注入量、合理的注入压力这几个主要参数进行的研究。最后根据注入水参数优化研究成果和计算方法,编制了相关的低渗油藏高压注水注入参数的优化设计计算程序。程序主要可以优选出合理的注入水中悬浮固体浓度,优选出最合适的高压注水注水量、注水压力、注入水温度、地层破裂压力。为实现低渗油藏高压注水的安全、高效、稳定、经济的开采提供参考依据。
[Abstract]:High pressure water injection in low permeability reservoir is always an important measure to increase production and stable production in oil field. The geological characteristics of low permeability reservoir decide that the way of water injection must be carried out by high pressure water injection. The first reason is that the permeability of low permeability reservoirs is low, the geological conditions are relatively poor, and there is a certain start-up pressure. Second, in the process of reservoir development, oil and gas are continuously exploited to the surface. Formation energy will be released to appear formation energy deficit, so the formation energy can be replenished by high pressure water injection. At present, high pressure water injection is mainly used to increase recoverable reserves, improve recovery and water injection efficiency of low permeability reservoirs. In this paper, the water injection parameters of low permeability oil fields in China are studied. The fine pores of the pore system are a remarkable feature of low permeability porous media. In order to improve the efficiency of high pressure water injection, this paper makes a detailed and in-depth study on the water quality of high pressure water injection, the injection rate of high pressure water injection, the pressure of high pressure water injection and so on. A set of methods for optimization of high pressure water injection parameters in low permeability reservoirs have been developed. In the development of low permeability reservoirs, there are a lot of reservoir energy shortage, only through high pressure water injection can the formation energy can be well supplemented, so that the formation can fully absorb water and obtain sufficient development energy. However, in the process of water injection, we will encounter many problems, such as the quality of injected water, the influence of injection quantity, the influence of mudstone creep on casing, And what range of injection pressure should be kept to best protect the casing and so on. This paper begins with the geological conditions of high pressure water injection in low permeability reservoirs and studies the geological characteristics of W area in Turpan-Hami Oilfield. The optimization of injection parameters for high pressure water injection in low permeability reservoirs is analyzed and studied. The main parameters of injection water quality, injection volume and reasonable injection pressure in low permeability reservoirs are studied. Finally, according to the research results and calculation methods of injection water parameters optimization, a program for optimization design of injection parameters for high pressure water injection in low permeability reservoirs is developed. The program can select the reasonable suspended solid concentration of injected water, select the most suitable high pressure water injection rate, water injection pressure, injection water temperature and formation fracture pressure. It provides a reference for the safe, efficient, stable and economical exploitation of high pressure water injection in low permeability reservoirs.
【学位授予单位】：长江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.6

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