Water coning in horizontal oil wells
WATER AND GAS CONING IN HORIZONTAL WELLS. For a vertical well the majority of the pressure drawdown is consumed near the wellbore. Therefore, there is a big drawdown around the wellbore in a vertical well. In the case of horizontal wells, the pressure drop is fairly uniform throughout the reservoir, and in a small region near the wellbore, water coning. 1. n. [Well Completions] The change in the oil-water contact profile as a result of drawdown pressures during production. Coning occurs in vertical or slightly deviated wells and is affected by the characteristics of the fluids involved and the ratio of horizontal to vertical permeability. Horizontal wells may also be applied to reduce gas coning rate, in gas-cap driven wells. 1.2. Although horizontal wells have been used to minimize coning, the use of horizontal wells cannot completely eliminate gas/water coning. Therefore, it is just as important as studying coning in horizontal wells. Water and/or gas coning is a serious problem in many reservoirs with wells producing from an oil zone underlying a gas cap, overlying an aquifer or both, Coning occurs in a well on production, when the water or gas zone moves up towards the wellbore in the form of a cone. If an oil reservoir has both, gas cap as well as bottom water, then the vertical well is normally perforated either near the center of the oil zone thickness or below the center, toward the water zone. This is because coning tendencies are inversely proportional to the density difference and are directly proportional to the viscosity. During well test operations, coning could be spot with an increasing BS&W or GOR during the high rate flowing periods. Once either gas or water coning has occurred, the fluid saturation and relative permeability will increase, making coning easier to produce. It is then recommended to shut the well in and let the fluid contact re-stabilize.
Water cresting is hard to solve in horizontal well as water coning in vertical well. Produced fluid injection back is effective at the beginning of oil production, more
Cold flow oil wells often produce oil at relatively low rates due to their low viscosity. heater deployed in long horizontal cold flow wells can profitably increase oil Balanced mobility contrast results in less water coning; Easy implementation Water and gas coning. Coning is a production problem in which gas cap gas or bottomwater infiltrates the perforation zone in the near-wellbore area and reduces oil production. Gas coning is distinctly different from, and should not be confused with, free-gas production caused by a naturally expanding gas cap. WATER AND GAS CONING IN HORIZONTAL WELLS. For a vertical well the majority of the pressure drawdown is consumed near the wellbore. Therefore, there is a big drawdown around the wellbore in a vertical well. In the case of horizontal wells, the pressure drop is fairly uniform throughout the reservoir, and in a small region near the wellbore, water coning. 1. n. [Well Completions] The change in the oil-water contact profile as a result of drawdown pressures during production. Coning occurs in vertical or slightly deviated wells and is affected by the characteristics of the fluids involved and the ratio of horizontal to vertical permeability. Horizontal wells may also be applied to reduce gas coning rate, in gas-cap driven wells. 1.2. Although horizontal wells have been used to minimize coning, the use of horizontal wells cannot completely eliminate gas/water coning. Therefore, it is just as important as studying coning in horizontal wells.
Keywords: Bottom Water, Natural Fractures, Horizontal Wells, Smart Water Sink reservoirs (NFR), the problem of water production (i.e. water coning and/or.
Cold flow oil wells often produce oil at relatively low rates due to their low viscosity. heater deployed in long horizontal cold flow wells can profitably increase oil Balanced mobility contrast results in less water coning; Easy implementation Water and gas coning. Coning is a production problem in which gas cap gas or bottomwater infiltrates the perforation zone in the near-wellbore area and reduces oil production. Gas coning is distinctly different from, and should not be confused with, free-gas production caused by a naturally expanding gas cap. WATER AND GAS CONING IN HORIZONTAL WELLS. For a vertical well the majority of the pressure drawdown is consumed near the wellbore. Therefore, there is a big drawdown around the wellbore in a vertical well. In the case of horizontal wells, the pressure drop is fairly uniform throughout the reservoir, and in a small region near the wellbore, water coning. 1. n. [Well Completions] The change in the oil-water contact profile as a result of drawdown pressures during production. Coning occurs in vertical or slightly deviated wells and is affected by the characteristics of the fluids involved and the ratio of horizontal to vertical permeability. Horizontal wells may also be applied to reduce gas coning rate, in gas-cap driven wells. 1.2. Although horizontal wells have been used to minimize coning, the use of horizontal wells cannot completely eliminate gas/water coning. Therefore, it is just as important as studying coning in horizontal wells.
Cresting in horizontal wells unlike coning in vertical wells is a well-known of vertical-to-horizontal permeability, distance from the wellbore to oil-water contact, .
water breakthrough problem. Horizontal wells also are used to minimise water coning. However, hor-izontal wells are themselves not free of water influx problems. Like the vertical wells, typical critical oil rates for avoiding water influx into horizontal wells are too low for any economic recovery. A detailed duced horizontal wells to the oil industry to produce a heavy oil carbonate reservoir in the Rospo Mare Field, offshore Italy, in the Adriatic Sea. At the same time, in the U.S., sev-eral companies were using horizontal wells to reduce gas coning in the Abo Reef in New Mexico. They were also us- Because of the lower drawdown, horizontal wells may be less prone to water or gas coning behavior. For example, horizontal wells have been drilled in the Widuri field, offshore Sumatra, so as to minimize water coning. High vertical permeabilities and viscous oil are factors likely to promote coning behavior in the vertical wells in the field.
actual oil production rate in some bottom water reservoirs, but some wells water coning in vertical wells have been investigated (Li and Song, 1993; Li, 1997;
duced horizontal wells to the oil industry to produce a heavy oil carbonate reservoir in the Rospo Mare Field, offshore Italy, in the Adriatic Sea. At the same time, in the U.S., sev-eral companies were using horizontal wells to reduce gas coning in the Abo Reef in New Mexico. They were also us-
16 Dec 2016 Abstract: Water production from oil wells is a common event which Keywords: Water coning; Critical rate; horizontal well; Water production. 11 Sep 2016 Water Coning Control with Dual Completions in Vertical Wells In a dual completion string we separately produce the oil and water zones and Horizontal wells have been applied in bottom-water reservoir since their and swept volume, higher cumulative oil production without water, and longer water modeling of water coning of horizontal well production in bottom water driving 17 Feb 2016 WATER AND GAS CONING IN HORIZONTAL AND VERTICAL gas-oil or water- oil contact and the perforated interval; and (vi) infill drilling. Cresting in horizontal wells unlike coning in vertical wells is a well-known of vertical-to-horizontal permeability, distance from the wellbore to oil-water contact, . 28 Jul 2012 Permadi P and Jayadi T. An improved water coning calculation for horizontal wells. Paper SPE 133162-MS presented at Oil and Gas 1 Mar 2018 Oil production from bottom-water drive reservoirs is characterized by water production related problem - water coning. Most times, horizontal