Abstract
The regular job of a reservoir engineer is to put a development plan to increase hydrocarbon production as possible and within economic and technical considerations. The development strategy for the giant reservoir is a complex and challenging task through the decision-making analysis process. Due to the limited surface water treatment facility, the reservoir management team focuses on minimizing water cut as low as possible by check the flow of formation and injected water movement through the Mishrif reservoir. In this research, a representative sector was used to make the review of water injection configuration, which is considered an efficient tool to make study in a particular area of the entire field when compared with the full-field model on the basis of time-consuming and computational analysis. The sector model was neighboring by extra grid blocks and three pseudo wells as injector wells to realize the pressure on the sector boundary, which attained an acceptable history matching. The fluid model and physics model were introduced by using Pressure Volume Temperature data of well involved in the study area and two relative permeability curves. Fourteen wells were utilized in this work, four wells are injectors, and the rest are producer. The development scenarios were implemented by setting various targets of oil production and different water injection rates required for pressure maintenance operations. Optimization of water cut has been applied by adjustment of production and injection rates and shut off the high water cut intervals. The results obtained from this study showed that the inverted 9-spot has a good recovery which is illustrated in the case_2C, the production rate was (49,000 STB/D) with minimum water cut (27.5%) as compared with a five-spot pattern.
Highlights
The main purpose of reservoir modeling is that reservoir modeling is the most powerful available predictive tool for oilfield development, which engages geological and reservoir information more than any else predicting tool of reservoir performance (Chen, 2007)
Porosity and permeability have been earlier identified, and capillary pressure and relative permeability, PVT analysis of reservoir fluids which relates to the well WQ1-XX15, that is involving in the sector studied area, all these were identified to model
The water cut ranged within (27.5% to 35.25%) which are considered as reasonable values because it examined as an economic measure from a practical view
Summary
The main purpose of reservoir modeling is that reservoir modeling is the most powerful available predictive tool for oilfield development, which engages geological and reservoir information more than any else predicting tool of reservoir performance (Chen, 2007). The strategy of developing large-scale reservoirs is a complicated and challenging decision-making process in the analysis process. These formations are considered to contain a large number of wells with long production history, in addition to heterogeneity characteristics that require the use of models to increase the computational requirements (Tleukhabyluly et al, 2016). There are several approaches to make the computational requirement less through using an approach by dividing the interesting area into several smaller sectors with specific dynamic models and simulation these sectors do not depend on one another. Sector modeling recently became a more efficient approach to make an evaluation of water injection performance in a particular area, which provides a shorter time when compared with a full-field model as time-consuming. After the primary stage has reached its economic limits as a result of production and leads to pressure declines, the secondary stage is initiated to maintain the pressure and avoid reducing oil recovery
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