Methods for cementing a subterranean wellbore
AssigneeEOG Resources, Inc.
InventorJames C. Mullen, II
Life of this patent
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Abstract
A method for cementing a tubular member within a subterranean wellbore extending from a surface into a subterranean formation and through a hydrocarbon reservoir includes (a) injecting a gas from the surface into an annulus surrounding the tubular member within the wellbore. In addition, the method includes (b) flowing cement through a throughbore of the tubular member. Further, the method includes (c) displacing the cement from the throughbore of the tubular member into the annulus. Still further, the method includes (d) reducing a pressure of the gas in the annulus during (c).
Claims18
A method for cementing a tubular member within a subterranean wellbore extending from a surface into a subterranean formation and through a hydrocarbon reservoir, the method comprising:
- (a) injecting a gas from the surface into an annulus surrounding the tubular member within the wellbore;
- (b) flowing cement through a throughbore of the tubular member;
- (c) displacing the cement from the throughbore of the tubular member into the annulus;
- and
- (d) reducing a pressure of the gas in the annulus during (c), wherein (d) further comprises:
- (d1) maintaining a fluid pressure in the annulus equal to or greater than a reservoir pressure of the reservoir;
- and
- (d2) limiting the loss of cement into the subterranean formation to less than about 20 vol %.
A method for cementing a tubular member within a subterranean wellbore extending from the surface into a subterranean formation and through a hydrocarbon reservoir, the method comprising:
- (a) injecting a gas from the surface into an annulus surrounding the tubular member within the wellbore;
- (b) pressurizing the gas in the annulus to push a fluid in the annulus downhole to a predetermined depth in the annulus;
- (c) flowing cement into a throughbore of the tubular member after (a);
- (c) displacing the cement from the throughbore of the tubular member into the annulus;
- and
- (d) bleeding the gas from the annulus during (c), wherein (d) further comprises maintaining a fluid pressure in the annulus equal to or greater than a reservoir pressure of the reservoir.
Dependencies are inferred from the claim text.