amin tahami

CO2 flooding is a proven method to mobilize the immobile oil in the reservoirs for enhanced oil recovery (EOR). Using CO2 for EOR has been commercially used for several decades in onshore and offshore oil fields in North America, Canada, and Brazil. The injection of CO2 will both improve oil recovery and contribute significantly to reduction of greenhouse gas emissions. Breakthrough and direct reproduction of CO2, and production of corrosive carbonated water are among the challenges with CO2 EOR projects. Breakthrough of CO2 leads to poor distribution of CO2 in the reservoir and low CO2 storage. Carbonated water production results in corrosion of process equipment on the platform. Autonomous inflow control valve (AICV) is capable of autonomously restricting the reproduction of CO2 from the zones with CO2 breakthrough, and at the same time produce oil from the other zones with high oil saturation. In addition, AICV can reduce the production of carbonated water. The objective of this ...

Hydraulic fracturing is a method of choice to improve production for the most of gas-condensate wells. In this work, hydraulic fracture effect on well production has been considered in one of Iranian gas condensate reservoirs. The target for propped hydraulic fracturing treatments is two sandstone layers with gross thickness of 101.7 ft and 95.1 ft at average depths 8725.45 of ft-TVD and 8823.75 of ft-TVD. In this study, different seven scenarios have been defined. For any scenarios, a hydraulic fracture has been designed. In the scenarios design, has been tried to attend all possible options of hydraulic fractures. In following, well cumulative production has been forecasted in both conditions without and with fracturing operation. The production forecast of seven scenarios represent that all scenarios increase cumulative production more than . In final, NPVs of the scenarios have been calculated and compared together and selected optimum scenario. The results are shown average fracture permeability is more effective than fracture length. Comparing NPVs of the scenarios represents NPV of Fourth Scenario is optimum. Since this is the first hydraulically fracture design in Iran, the design and results can be very useful for production planning of other Iranian tight gas reservoirs.

The demand for non-conventional oil has increased globally. Non-conventional oil is categorized as extra heavy oil and bitumen. In reservoirs with extra heavy oil and bitumen, thermal methods are used to reduce the oil viscosity. Steam assisted gravity drainage (SAGD) is a thermal recovery method to enhance the bitumen recovery. In this method, steam is injected to bitumen and heavy oil to reduce the viscosity and make the oil mobile and extractable. To obtain an efficient SAGD process, the residence time for steam in the reservoir must be long enough for the steam to condense and release the latent energy to be transferred to the cold bitumen. Early breakthrough of steam in some parts of the well will eventually limit the oil production and must be avoided. Autonomous inflow control valve (AICV) can prevent the steam breakthrough and restrict the excessive production of steam. The objective of this paper is to investigate the performance of AICV and its impacts on increased oil pro...

In today's world demand for natural gas as a source of energy has been increased. Especially in Iran the main source of home's heat energy is natural gas. In fall and winter demand for natural gas increases that may exceed the amount of total gas production. Underground gas storage is an activity, which allows to efficiently resolve demand seasonality problems. Natural gas injection and storage in depleted gas reservoirs is a common challenge that overcomes this problem. The aim of this study is to use tracer test method as a way to better understand a gas condensate reservoir to use it as a UGS. Case studies showed that gas tracer technology is one of the best methods for improving reservoir characterization and description of gas storage reservoirs. So it is well known in the petroleum industry that tracer data can provide valuable information on reservoir characteristics and fluid flow performance. The reservoir under study in this work is a limestone gas condensate reser...