... might appear on the rear end of the slug, and their breakthrough might reduce the oil recovery factor. In the paper we study the size of the mixing zone on the rear end of the slug and further the development of the graded viscosity banks technology (GVB or tapering) to reduce the volume of used polymer...

..., in unconsolidated reservoirs, additional phenomena caused by the rock deformation are present which require additional attention. Formation of the thief zones First of all, it is required to give a determination and classification of breakthroughs types at the development of unconsolidated viscous oil...

... fracturing materials drillstem testing fracturing fluid drillstem/well testing reservoir geomechanics hydraulic fracturing drilling operation breakthrough pilot survey clay layer concentration thickness log analysis proppant upstream oil & gas ac12 formation geomechanical model linear...

... productivity well planning wellbore reduction srednebotuobinskoye field breakthrough junction multilateral well tyngd reservoir multilateral well design russia Introduction There are a significant number of new field developments underway in Eastern Siberia and the Region is considered...

... breakthroughs, horizontal wells drilled in thin oil rims are equipped with autonomous inflow control system. The study describes the experience of AICD application for one of the largest fields in East Siberia with an oil rim and a large gas cap, where an integrated analysis of the AICD well performance...

... breakthrough gas cap enhanced recovery upstream oil & gas oil production rim water flooding improvement experience production control drilling operation water flooding cell hydrodynamic model compensation water injection pilot region flooding autonomous system injection production well...

... which decrease the final oil and gas productions. One of these disadvantages is a fracture breakthrough into the adjacent layers with following water cut increase and reduction of cumulative oil and gas production and production rates. Bearing in mind the geological structure of the explorational...

... cap, breakthrough of auto-frac fractures toward bottomhole producers, and poor performance of the water injection system. Based on the foregoing, a three-dimensional (3D) geomechanical model of the study reservoir was created and the data obtained was used to monitor the current development status...

... is to ensure a constant and uniform flow of fluid to the horizontal barrel. The basis for this is to maintain equal depression at all points of the horizontal section and reduce the risks of gas and water breakthrough. This paper describes the evolution of the completion strategy of horizontal wells of extreme...

... a restriction on the desirable geometry of the fracture to prevent a breakthrough into a flooded interval. Combining several methods of fracture height restriction and controlling such height can improve the efficiency of multi-stage hydraulic fracturing. The first technology to control the effective pressure...

... and valves along with validation of sand filters. The successfully performed completion stage in long horizontal sections provided very good results during wells operation: Higher flow rates vs. previously drilled wells. No water/gas breakthrough vs. wells completed only with filters. Absence...

... sandstone and high-viscosity oil. For the deposition of an early breakthrough of water or gas into the wellbore, it was decided to conduct a pilot stage of project on the use of various types of completion (autonomous inflow control devices), which allow controlling the inflow along the wellbore. Formation...

... types of reservoir completion (ICD, ACID, AICV) have been decided to trial test for this field in order to mitigate early water or gas breakthrough along the long horizontal well. During this trial testing of the optimum type of lower completion, the continuous well monitoring is required; clean-up...

... in water relative permeability resulting from polymer adsorbing to the rock and the increased viscosity of the injected fluid but also owing to changes in injection regime. The changes in injection regime might lead to early breakthrough of chase water as it might not flow along the same paths...

... lateral drilling society of petroleum engineers horizontal well breakthrough completion taml-1 technology whipstock construction Introduction Novoportovskoye Oil, Gas and Condensate Field was discovered in 1964, and it is the first hydrocarbon field discovered on the Yamal Peninsula...

..., it is recommended to inject a slug of liquefied gas or other light hydrocarbons into a reservoir before injecting APG. To increase the accuracy and reliability of MMP, it is recommended to use the graphical function of gas breakthrough vs. pressure, rather than the usual function of oil displacement ratio (after...

...Tools for estimating the performance and risks of well interventions Further, the risks are assessed related to reserves, distance to the water-gas-saturated formation, water breakthrough, technical condition, reservoir pressure, shutoff parameters ( Fig. 3 ). This method allows...

... breakthrough. Another challenge that is faced primarily during development of oil-rim (sub-gas) reservoirs is the selection of the most suitable completion designs. An outstanding example of oil rim stimulation was a project in Novoportovskoye field where an operator faced with a complex geological model...

... and taking into account the mutual influence of cracks and local stress changes will increase the efficiency of hydraulic fracturing on Vinogradov field and reduce the risks of breakthroughs of cracks in non-target geological objects. As can be seen in Fig. 25 , the results of acoustic logging recovery...

... as the SNL method but with a weak electromagnetic field (in contrast to oil and gas molecules which almost do not get electrified). Testing this method in vertical wells and in laboratory conditions on core material showed good efficiency when recording water breakthroughs both in gas and oil environments...