| Popis: |
CJSC "Rospan International" developing the Achimov deposits on the two license areas. These reservoirs have the gas condensate saturation, low permeability at the level of 0.8-1.6 md, abnormally high formation pressure by a factor of ∼ 1.7 abnormalities. Reservoir Engineering conducted using large volume fracturing with proppant loading of 150-400 tonns. Geological formations heterogeneity, nonsimultaneous entering wells and as a result, the uneven development of reservoirs necessitate of regulation of technological modes of operation wells. The task is to select the well operating mode, maximizes the production of liquid hydrocarbons at a constant level of gas production. The results presented in this paper, represent a further development of approaches to solving the problems previously described in two papers [1], [2]. The model is presented as a single complex network model collecting the two license areas and merged with reservoir model and the model of the GTU. The type of reservoir models as part of the integrated model is a matter of finding the most suitable to the conditions of the problem being solved tool and is considered in detail in the article. This paper describes the approaches to setting up model to the actual data, including the use of automated tools. The concept has been used to set up an equal uncertainty in the evidence. So, to build a table of pressure losses along the wellbore, the work carried out at the choice of a single correlation flow in the wellbore without the individual correction factors. It was chosen the single choke model, which does not provide for individual tuning coefficients of variation, as a way of setting pressure drop across the each well. It was justified choice of options in the calculation of temperature performance and thermal conductivity of selected wells. As a result of the work is considered an upgraded integrated model, which allows to carry out work on the automated setup to the actual data and to optimize technological operating mode wells. The optimizer takes into account the dependence of the condensate-gas factor on the selected operating mode of the well, and can thus be used for the oil fields, where the limiting factor may be the high GOR and for gas condensate fields to improve the current condensate recovery. Developed in the course of the project methodology reduces uncertainty of the model set up procedure to the actual data and carry out optimization calculations for choosing the best wells operation mode. |
