涩北气田典型层组合理配产研究

发布时间：2018-06-10 07:23

本文选题：疏松砂岩 + 产能评价　；参考：《西南石油大学》2017年硕士论文

【摘要】：疏松砂岩气藏的开发中通常面临着应力敏感、出水、出砂、井筒积液等问题,从而导致气井的产能大幅度降低,造成气田经济损失。而合理的产量可以有效抑制以上问题,因此合理配产在疏松砂岩开发中就显得非常重要。本文以疏松砂岩气藏为研究对象,在前人的理论研究和气藏的实测数据基础上,以涩北气田典型层组的合理产量为目标,从产能影响因素渗流机理和单井、层组压力变化特征入手,完成了以下主要工作:(1)涩北气田典型层组88 口气井的产能测试资料的合理解释;针对四个主要产能影响因素的渗流机理分析。(2)四个典型层组的单井及层组动态地质储量的评价;单井及层组压力变化特征分析;气藏稳产能力的评价。(3)涩北气井单井的优化配产研究以及计算分析;通过数值模拟方法预测Ⅲ-2、Ⅲ-3层组的配产生产指标。通过以上研究,得到了以下的主要结论和认识:(1)涩北气井产能影响因素主要有应力敏感、出水、出砂以及多层合采气井的层间干扰。常规产能分析方法不适用于涩北气井,其解释结果往往偏大。(2)四个典型层组的储量动用潜力及挖潜措施存在差异。(3)开发过程中,各层组地层压力分布及其变化规律的主控因素包括:投产时间、单井配产、井网密度、开采强度和边水水体的大小及边水连通程度。(4)由于较高的单井配产具有较大的举升能力,能有效防止井筒积液对气井产量及可采储量的损害,所以通过增压开采降低地层废弃压力能有效延长气井稳产期、提高涩北气田开发效果。(5)涩北气田气井稳产能力的年均递减率为10.43%,主控因素是水源和井型。(6)涩北气井单井优化配产考虑因素有气井产能、层组能量、井底积液、地层出砂、井底沉沙以及冲蚀作用,但是涩北气井几乎不用考虑冲蚀作用。本论文的主要创新点:通过对气井产能影响因素的渗流机理分析,结合公式法和回压试井方法评价涩北气井产能,提出了涩北气井修正公式产能评价法;提出了单井控制储量占容积法地质储量比例加权的层组平均地层压力计算方法,并结合压降法和二项式产能方程修正系数计算单井、层组动态储量;气井稳产能力递减规律的(数理统计)分析方法;结合气井产能、层组能量、单井优化配产对涩北气田典型层组进行配产。
[Abstract]:In the development of unconsolidated sandstone gas reservoirs, the problems of stress sensitivity, water discharge, sand production and wellbore liquid accumulation have resulted in a large reduction in the productivity of the gas well and the economic loss of the gas field. And the reasonable yield can effectively suppress the above problems. Therefore, it is very important to reasonably match production in the development of loose sand rock. This paper is based on unconsolidated sandstone gas. On the basis of the previous theoretical research and the measured data of gas reservoir, taking the reasonable output of the typical layer group in the Shibei gas field as the target, the following main work has been completed from the percolation mechanism of the factors affecting the productivity and the characteristics of the change of the layer group pressure. (1) the capacity test data of the 88 gas wells in the typical layer group of the astringent gas field The analysis of the percolation mechanism of four main productivity factors. (2) evaluation of the dynamic geological reserves of single well and layer group of four typical layers, the analysis of the change characteristics of single well and layer pressure, the evaluation of the stable production capacity of gas reservoir. (3) the optimization of production and calculation of the single well in the astringent gas well, and the prediction of the third -2 by numerical simulation method. According to the above research, the following main conclusions and understandings are obtained: (1) the main factors affecting the productivity of the astringent well are stress sensitivity, effluent, sand production and interlayer interference in multi-layer gas wells. The conventional productivity analysis method is not suitable for the astringent North gas well, and the interpretation results are often large. (2) four typical layers. There are differences in reserves moving potential and potential digging measures. (3) in the process of development, the main control factors of the distribution of formation pressure and its change law of each layer include: production time, single well distribution, well network density, mining intensity and the size of water body and edge water connectivity. (4) it is effective because of the higher lifting capacity of single well distribution. To prevent the damage of well bore to the production and recoverable reserves of gas wells, reducing the formation waste pressure by pressurized mining can effectively prolong the stable production period of gas wells and improve the development effect of shingbei gas field. (5) the annual average decline rate of the stable production capacity of the gas well in astringent gas field is 10.43%, the main controlling factors are water source and well type. (6) consideration of the optimization of single well production in the astringent North gas well Factors include gas well productivity, layer formation energy, bottom hole fluid accumulation, sand formation, bottom sand sinking and erosion effect, but the astringent North gas well does not have to consider erosion. The main innovation of this paper is: through the analysis of the seepage mechanism of the influence factors of gas well productivity, combining formula method and back pressure test method to evaluate the productivity of the astringent well, the paper puts forward astringent. The method of productivity evaluation for the modified formula of North gas well is proposed, and a method for calculating the average stratigraphic pressure of the layer group with the weight of the single well controlled reserves in proportion to the volume method of geological reserves is put forward, and the calculation method of single well, the dynamic reserve of the stratigraphic group and the law of the recurrence of the gas well's stable production capacity, combined with the pressure drop method and the binomial productivity equation correction coefficient, are combined with the gas well. Production capacity, formation energy and single well production optimization are used for production of the typical formation in the north of the Shibei gas field.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE37

【相似文献】