Geological Model of the Khabour Reservoir for Studying the Gas Condensate Blockage Effect on Gas Production, Akkas Gas Field, Western Iraq
Khabour沉积盆地是伊拉克西部主要的砂岩储层之一，属于奥陶纪早古生代的Akkas气田。在识别砂岩储层时，研究人员面临困难，因为这些储层几乎总是致密和不均匀的。本文描述了一个含有凝析油的天然气储层的地质建模，并且凝析油在井底压力降低至露点以下时出现。通过定义岩性和评估复杂储层的岩石物理参数，利用CMG BUILDER软件（GEM工具）构建储层的地质模型，以创建一个静态模型。
储层的岩石物理性质是使用水力单元概念计算的，并且构建地质模型有几个基本步骤，从创建单井模型开始，然后再分配属性。根据岩石物理参数的差异，储层被分为七个区域。奥陶纪地层（Khabour地层）被Akk-1井穿过，该井被包括在单井地质模型中，以便专注研究气体凝析对气体生产的影响。对气体凝析井生产的预测将严重依赖于油带评估和模拟，因此选择了Akk-1井来建立模型。
在Khabour储层中，上下两个砂岩单元因含有天然气而被认为最重要。开发这些储层所面临的成本和风险在压力和温度极端的条件下凸显出来，因此需要能够自信地预测从Khabour储层中气体和液滴开采的需求。
| Abstract | |
| The Khabour reservoir, Ordovician, Lower Paleozoic, Akkas gas field which is considered one of the main sandstone reservoirs in the west of Iraq. Researchers face difficulties in recognizing sandstone reservoirs since they are virtually always tight and heterogeneous. This paper is associated with the geological modeling of a gas-bearing reservoir that containing condensate appears while production when bottom hole pressure declines below the dew point. By defining the lithology and evaluating the petrophysical parameters of this complicated reservoir, a geological model for the reservoir is being built by using CMG BUILDER software (GEM tool) to create a static model. The petrophysical properties of a reservoir were computed using the notion of hydraulic units, and there are a number of basic steps to building a geological model, beginning with the creation of a single well model and then moving on to the distribution of properties. Depending on the variance in petrophysical parameters, the reservoirs were separated into seven zones. The Ordovician Formation (Khabour Formation) is penetrated by well Akk-1, which is included in the single well geological model to focus on studying the impact of gas condensate on gas production. The prediction of gas condensate wells production will strongly depend on oil banking evaluation and modeling. For this reason, well Akk-1 was chosen to build the model. Upper and lower sandstone units characterized as the most important due to containing of gas. The cost and risk to develop these reservoirs under severe conditions of pressure and temperature highlight the need to be able to confidently predict the recovery of gas and liquid drop-outs from Khabour reservoirs so, it is so necessary to predict the cost of this step in another paper. | |
| Keywords: | Geological model; Builder software; Khabour Reservoir; Akkas gas field |
