边水对普光气田生产动态影响研究

发布时间：2019-06-04 11:12

【摘要】：普光气田是我国实施“川气东送”的主供气源,具有埋藏深、储层非均质性强、气水关系复杂等特点。普光主体气藏2009年10月投入开采,随着开采的进行,边部气井液气比逐渐攀升,边水水侵已经成为制约气田高效开发的主要问题之一,因此开展边水水侵对气藏开发动态影响研究具有重要意义。论文以渗流力学、气藏工程、数值模拟等理论为基础,结合生产动态数据,正确认识普光主体水体体积大小,水体活跃程度,摸清气藏水侵规律,预测气藏水侵动态,并提出了合理控水措施。主要研究方法和取得成果如下：(1)运用容积法、气藏工程、数值模拟等方法确定气藏水体体积,水侵量,评价水体活跃程度。气藏水体倍数为4.5倍,水体活跃程度为较活跃,气藏水体局部活跃程度不同,103、105井区表现为强水侵特征。(2)建立了数值模型,进行精细历史拟合,运用数值模拟方法研究气藏水侵特征。纵向上展示了TSQ1 Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ层序水侵状况,TSQ1Ⅲ层序水侵严重、气水界面局部突进,TSQ1Ⅳ层序次之。气藏产水高峰期为2016至2021年,2020年平均日水侵量最大,为1.56x 104m3/d。选取合适数学模型计算受水侵影响的边部气井合理配产,结果显示,16口受水侵影响的边部气井,合理配产主要在15×104m3/d～20×l04m3/d之间。(3)从产能、稳产期和可采储量三个方面,评价水侵对开发效果的影响。结合液气比,岩心相渗数据,计算井周渗透性变差造成的产能下降程度。数值模拟结果显示,气藏稳产期较出水前下降半年。(4)提出四种控水方案,运用数值模拟方法进行综合指标对比,结果显示,目前边部气井限产和堵水两种方案比较合理。
[Abstract]:Puguang gas field is the main source of gas supply for "Sichuan gas transmission to the east" in China, which has the characteristics of deep burial, strong reservoir heterogeneity, complex gas-water relationship and so on. Puguang main gas reservoir was put into production in October 2009. With the development of exploitation, the liquid-gas ratio of edge gas wells is gradually rising, and edge water invasion has become one of the main problems restricting the efficient development of gas fields. Therefore, it is of great significance to study the influence of edge water invasion on gas reservoir development performance. Based on the theories of seepage mechanics, gas reservoir engineering and numerical simulation, combined with the production performance data, this paper correctly understands the volume size and active degree of Puguang main water body, finds out the law of water invasion in gas reservoirs, and forecasts the water invasion performance of gas reservoirs. The reasonable water control measures are put forward. The main research methods and achievements are as follows: (1) using volume method, gas reservoir engineering, numerical simulation and other methods to determine the volume of gas reservoir water body, water invasion, and evaluate the active degree of water body. The water body multiple of gas reservoir is 4.5 times, and the active degree of water body is more active. The local activity degree of gas reservoir water body is different, and the 103105 well area shows the characteristics of strong water invasion. (2) the numerical model is established and the fine history fitting is carried out. The characteristics of water invasion in gas reservoir are studied by numerical simulation method. Longitudinally, it shows that the water invasion of TSQ1 鈪，

本文编号：2492683