Squeeze Process For Reactivation Of Well Treatment Fluids Containing A Water-Insoluble Adsorbent
First Claim
1. A process comprisinginjecting an initial charge of a mixture, the mixture being formed from at least a water-insoluble adsorbent and at least one well treatment agent, into a well bore formed in a subterraneous formation so as to form a downhole matrix within the formation;
- injecting a solution comprised of an additional amount of the well treatment agent into the formation after the initial charge of the at least one well treatment agent has been substantially depleted; and
thenpressurizing the well bore for a time and under conditions sufficient to reactivate the down-hole matrix in the formation, so that the treatment agent activity of the matrix is increased relative to the treatment agent activity of the matrix just prior to injecting the solution.
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Accused Products
Abstract
A process for fracturing a subterraneous formation in the production of an oil well is described. The process steps include injecting an initial charge of a mixture, the mixture being formed from at least a water-insoluble adsorbent and at least one well treatment agent, into a well bore formed in the subterraneous formation so as to form a downhole matrix within the formation; injecting a solution comprised of an additional amount of the well treatment agent into the formation after the initial charge of the at least one well treatment agent has been substantially depleted; and then pressurizing the well bore for a time and under conditions sufficient to reactivate the downhole matrix in the formation, so that the treatment agent activity of the matrix is increased relative to the treatment agent activity of the matrix just prior to injecting the solution.
32 Citations
20 Claims
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1. A process comprising
injecting an initial charge of a mixture, the mixture being formed from at least a water-insoluble adsorbent and at least one well treatment agent, into a well bore formed in a subterraneous formation so as to form a downhole matrix within the formation; -
injecting a solution comprised of an additional amount of the well treatment agent into the formation after the initial charge of the at least one well treatment agent has been substantially depleted; and
thenpressurizing the well bore for a time and under conditions sufficient to reactivate the down-hole matrix in the formation, so that the treatment agent activity of the matrix is increased relative to the treatment agent activity of the matrix just prior to injecting the solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A process which comprises:
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injecting an initial charge of a mixture, the mixture being formed from at least a water-insoluble adsorbent and at least one well treatment agent, into a well bore formed in a subterraneous formation; placing the mixture adjacent to the subterranean formation to form a fluid-permeable matrix that is capable of reducing or substantially preventing the passage of formation particles from the subterranean formation into the well bore while at the same time allowing passage of formation fluids from the subterranean formation into the well bore; and
thenpressurizing the well bore for a time and under conditions sufficient to reactivate the matrix in the formation, so that the treatment agent activity of the matrix is increased relative to the treatment agent activity of the matrix just prior to injecting the solution. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A process which comprises:
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placing a screening device in a well bore formed in a subterraneous formation; injecting an initial charge of a mixture, the mixture being formed from at least a water-insoluble adsorbent and at least one well treatment agent, into the well bore, wherein the mixture is injected into the well bore such that the mixture is packed around the exterior of the screening device to provide a fluid-permeable matrix around the screening device which is capable of reducing or substantially preventing the passage of formation particles from the subterranean formation into the well bore while at the same time allowing passage of formation fluids from the subterranean formation into the well bore; and
thenpressurizing the well bore for a time and under conditions sufficient to reactivate the matrix in the formation, so that the treatment agent activity of the matrix is increased relative to the treatment agent activity of the matrix just prior to injecting the solution. - View Dependent Claims (17, 18, 19, 20)
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Specification