SECURITIES AND EXCHANGE COMMISSION

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934

ENCANA CORPORATION

1800, 855 – 2^nd Street SW
Calgary, Alberta, Canada T2P 2S5
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):     o

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):     o

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934:

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-                         

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: April 28, 2005

Form 6-K Exhibit Index

Exhibit No.

EnCana agrees to sell Gulf of Mexico assets
to Statoil for US$2 billion

CALGARY, Alberta (April 28, 2005) — EnCana Corporation’s (TSX, NYSE: ECA) U.S. affiliates have reached an agreement to sell all of their interests in the Gulf of Mexico to Statoil for approximately US$2 billion cash, resulting in net proceeds of approximately $1.5 billion after tax and other adjustments. The sale is expected to close on or before June 1, 2005 and is subject to normal closing conditions and regulatory approvals.

“This divestiture is a continuation of EnCana’s sharpened focus on our huge unconventional onshore North America natural gas and oil resources. The growth potential of our resource play portfolio is evident from its total resource life of more than 25 years at year-end 2004,” said Gwyn Morgan, EnCana’s President & Chief Executive Officer.

EnCana’s total investment to date in the Gulf of Mexico assets is approximately $540 million. The gross proceeds of this transaction will be credited to EnCana USA’s full cost pool, which is expected to result in a reduction in the U.S. depreciation, depletion and amortization rate by approximately 15 percent.

EnCana’s Gulf of Mexico interests contain six significant deepwater discoveries including a 25 percent working interest in the ChevronTexaco-operated Tahiti discovery, one of the largest discoveries in the deepwater Gulf of Mexico to date. The other five significant non-operated discoveries — Tonga, Jack, St. Malo, Sturgis and Sawtooth — are currently under appraisal. EnCana’s Gulf of Mexico assets include an average 40 percent working interest in 239 gross blocks comprising about 1.4 million acres. At December 31, 2004, EnCana had 41 million barrels of oil equivalent proved reserves booked for the Tahiti discovery. The Gulf of Mexico assets are in the development and appraisal phase, accordingly there is no current production.

Proceeds from the sale are expected to be directed to debt reduction and the continuation of EnCana’s share purchase program pursuant to EnCana’s current Normal Course Issuer Bid (Bid). Under the current Bid, the company may purchase up to 10 percent of the company’s public float, or 46 million shares, at the time of the approval of the original bid in October, 2004. The company had 440.8 million shares outstanding at March 31, 2005 and it may purchase about 20 million additional shares through the expiry of the Bid in October 2005.

Gulf of Mexico interests to be sold to Statoil

EnCana is being advised on the Gulf of Mexico sale by Morgan Stanley and Randall & Dewey.

EnCana is continuing with the previously-announced divestiture of its Ecuador assets and select conventional producing properties in Western Canada. Both divestitures are expected to occur this year.

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EnCana Corporation
With an enterprise value of approximately US$37 billion, EnCana is one of North America’s leading natural gas producers, is among the largest holders of gas and oil resource lands onshore North America and is a technical and cost leader in the in-situ recovery of oilsands bitumen. EnCana delivers predictable, reliable, profitable growth from its portfolio of long-life resource plays situated in Canada and the United States. Contained in unconventional reservoirs, resource plays are large contiguous accumulations of hydrocarbons, located in thick or areally extensive deposits, that typically have low geological and commercial development risk, low average decline rates and very long producing lives. The application of technology to unlock the huge resource potential of these plays typically results in continuous increases in production and reserves and decreases in costs over multiple decades of resource play life. EnCana common shares trade on the Toronto and New York stock exchanges under the symbol ECA.

ADVISORY REGARDING RESERVES DATA AND OTHER OIL AND GAS INFORMATION — EnCana’s disclosure of reserves data and other oil and gas information is made in reliance on an exemption granted to EnCana by Canadian securities regulatory authorities which permits it to provide such disclosure in accordance with U.S. disclosure requirements. The information provided by EnCana may differ from the corresponding information prepared in accordance with Canadian disclosure standards under National Instrument 51-101 (NI 51-101). EnCana’s reserves quantities represent net proved reserves calculated using the standards contained in Regulation S-X of the U.S. Securities and Exchange Commission. Further information about the differences between the U.S. requirements and the NI 51-101 requirements is set forth under the heading “Note Regarding Reserves Data and Other Oil and Gas Information” in EnCana’s Annual Information Form.

In this news release, certain crude oil and NGLs volumes have been converted to cubic feet equivalent (cfe) on the basis of one barrel (bbl) to six thousand cubic feet (Mcf). Also, certain natural gas volumes have been converted to barrels of oil equivalent (BOE) on the same basis. BOE and cfe may be misleading, particularly if used in isolation. A conversion ratio of one bbl to six Mcf is based on an energy equivalency conversion method primarily applicable at the burner tip and does not necessarily represent value equivalency at the well head.

ADVISORY REGARDING FORWARD-LOOKING STATEMENTS — In the interests of providing EnCana shareholders and potential investors with information regarding EnCana, including management’s assessment of EnCana’s and its subsidiaries’ future plans and operations, certain statements contained in this news release are forward-looking statements within the meaning of the “safe harbour” provisions of the United States Private Securities Litigation Reform Act of 1995. Forward-looking statements in this news release include, but are not limited to: the anticipated closing of the Gulf of Mexico transaction and the proceeds therefrom; anticipated cash taxes and other adjustments associated with the transaction; the expected impact of the transaction on depreciation, depletion and amortization rates; the anticipated use of proceeds from the transaction for debt reduction and share purchases under the company’s Normal Course Issuer Bid program; the expected closing of the company’s planned divestitures of its Ecuador and select conventional producing properties in Western Canada and the timing thereof; anticipated growth potential of the company’s resource play portfolio; and anticipated total resource life. Readers are cautioned not to place undue reliance on forward-looking statements, as there can be no assurance that the plans, intentions or expectations upon which they are based will occur. By their nature, forward-looking statements involve numerous assumptions, known and unknown risks and uncertainties, both general and specific, that contribute to the possibility that the predictions, forecasts, projections and other forward-looking statements will not occur, which may cause the company’s actual performance and financial results in future periods to differ materially from any estimates or projections of future performance or results expressed or implied by such forward-looking statements. These risks and uncertainties include, among other things: volatility of oil and gas prices; fluctuations in currency and interest rates; product supply and demand; market competition; risks inherent in the company’s marketing operations, including credit risks; imprecision of reserves estimates and estimates of recoverable quantities of oil, natural gas and liquids from resource plays and other sources not currently classified as proved reserves; the company’s ability to replace and expand oil and gas reserves; its ability to generate sufficient cash flow from operations to meet its current and future obligations; its ability to access external sources of debt and equity capital; the timing and the costs of well and pipeline construction; the company’s ability to secure adequate product

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transportation; changes in environmental and other regulations or the interpretations of such regulations; political and economic conditions in the countries in which the company operates, including Ecuador; the risk of war, hostilities, civil insurrection and instability affecting countries in which the company operates and terrorist threats; risks associated with existing and potential future lawsuits and regulatory actions made against the company; and other risks and uncertainties described from time to time in the reports and filings made with securities regulatory authorities by EnCana. Although EnCana believes that the expectations represented by such forward-looking statements are reasonable, there can be no assurance that such expectations will prove to be correct. Readers are cautioned that the foregoing list of important factors is not exhaustive.

Furthermore, the forward-looking statements contained in this news release are made as of the date of this news release, and EnCana does not undertake any obligation to update publicly or to revise any of the included forward-looking statements, whether as a result of new information, future events or otherwise. The forward-looking statements contained in this news release are expressly qualified by this cautionary statement.

Further information on EnCana Corporation is available on the company’s Web site, www.encana.com, or by contacting:

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