Exhibit 99.1

DATE: May 4, 2016

WPX Energy Reports 1Q 2016 Results:

Increasing EURs for Delaware and Williston Wells

TULSA, Okla. – WPX Energy (NYSE: WPX) announced today that it is increasing its estimated ultimate recoveries (EURs) for its Delaware Basin wells in the Permian to 900 Mboe, up 34 percent from its acquisition type curve of 670 Mboe.

The company plans to increase its rig count in the Delaware from two to three during the second half of the year without increasing its capital budget. WPX’s guidance for total drilling and completion (D&C) capital for 2016 remains unchanged at $350 million to $450 million. Based on improving well costs and productivity, WPX believes it can generate returns in excess of 40 percent in the Delaware Basin at current commodity prices.

WPX has made rapid progress toward its vision for Wolfcamp A wells in the Delaware Basin. The company expects D&C costs – including facilities and artificial lift – to approach $5.3 million per well during the second quarter, down from $6 million at the end of 2015 and from $7 million at the time of WPX’s acquisition of RKI Exploration & Production last summer. The $5.3 million projection includes larger completions using 2,000 pounds of sand per foot.

In the Williston Basin, WPX is now recognizing a blended type curve of 850 Mboe for its wells in the Middle Bakken and Three Forks formations, up 13 percent from previous estimates of 750 Mboe. Current D&C costs – including facilities and artificial lift – are approximately $5.9 million per well, down from $8.5 million in the first quarter a year ago.

“We accomplished a great deal this quarter and delivered solid results, despite challenging commodity prices,” said Rick Muncrief, President and CEO. “Our transformation is on track, evidenced by lower operating costs, record oil volumes, higher EURs, the close of two more asset sales and stronger liquidity. We also have retired debt early and will continue to manage our balance sheet in a responsible manner.

“I’m very proud of how our organization is executing in all three of our asset areas. At current strip pricing, they each deliver attractive returns. Continuous improvement is the norm, not the exception. We can leverage this momentum as we start to accelerate our development in the Delaware Basin,” Muncrief added.

1Q FINANCIAL RESULTS

WPX reported an unaudited first-quarter 2016 net loss attributable to common shareholders of $17 million, or a loss of $0.06 per share on a diluted basis, including a $198 million gain on the sale of assets.

The adjusted net loss from continuing operations (a non-GAAP financial measure that excludes certain items typically excluded from published analyst estimates) in the first quarter was $59 million, or a loss of $0.21 per share. Adjusted EBITDAX (a non-GAAP financial measure) for the first quarter was $131 million. Reconciliations for non-GAAP financial measures are available in the tables that accompany this press release.

The weighted average gross sales price – prior to revenue deductions – for oil decreased 30 percent vs. a year ago to $26.78 per barrel in first-quarter 2016. Natural gas prices decreased 39 percent to $1.77 per Mcf. NGL prices decreased 36 percent to $11.60 per barrel.

Oil revenues of $97 million accounted for more than 75 percent of total product revenues in a quarter for the first time. Total product revenues were $127 million in first-quarter 2016. Prior to WPX’s reclassification of its Piceance results to discontinued operations, oil revenues comprised 44 percent of total product revenues in full-year 2015.

WPX’s total liquidity at the close of business on May 3 was approximately $1.6 billion, consisting of $1.025 billion in undrawn capacity on the company’s revolving credit facility that was amended in March and approximately $580 million in unrestricted cash and cash equivalents.

WPX completed the previously announced sales of its San Juan Basin gathering system in March and its Piceance subsidiary in April for approximately $1.2 billion combined. The company applied a portion of these funds for debt reduction to repay borrowings on its revolver and to repurchase 29 percent of its outstanding 5.250 percent senior notes due in 2017.

OPERATIONS UPDATE

Total company production volumes were 80.1 Mboe per day in the first quarter. Oil volumes accounted for 52 percent of production, reaching a new company best of 41,500 barrels per day. Total liquids accounted for 62 percent of production.

WPX’s commodity mix has shifted dramatically following the acquisition of Delaware Basin properties in the Permian last year and the recent sale of its Piceance Basin subsidiary.

Prior to the Piceance divestiture, natural gas volumes accounted for 70 percent of WPX’s production a year ago. The results of Piceance Basin operations, including associated production volumes, have been reclassified as discontinued operations and are not reflected in the table below.

For the remainder of 2016, WPX has 30,438 barrels per day of oil hedged at a weighted-average price of $60.35 per barrel. Excluding the derivatives assigned at closing in the sale of the Piceance subsidiary, WPX has natural gas derivatives totaling 146,541 MMBtu per day for the remainder of 2016 at a weighted price of $3.93 per MMBtu.

For 2017, WPX has 22,804 barrels per day of oil hedged at a weighted-average price of $50.71 per barrel. WPX also has 90,000 MMBtu per day of natural gas hedged at a weighted-average price of $2.82 per MMBtu.

WPX participated in the completion of 42 gross (21.4 net) wells from continuing operations in first-quarter 2016. Overall capital spending was $170 million, including $24 million of Piceance activity that will effectively be reimbursed in conjunction with the sale’s closing. WPX expects a slower run rate for subsequent periods in 2016.

DELAWARE BASIN

WPX operates in the core of the Permian’s world-class Delaware Basin, where the company has more than 1.1 billion barrels of equivalent net resource potential. Current activity is concentrated in the Wolfcamp play.

Delaware production averaged 17.4 Mboe per day in the first quarter, up 6 percent vs. the sequential quarter. Notably, WPX’s oil production increased 32 percent vs. the sequential quarter. Natural gas and NGL production was impacted by an outage at a third-party gas processing plant.

Subsequent to the close of the first-quarter, WPX completed the Lindsay 2-4H well in the Wolfcamp A that achieved a rate of 2,060 Boed at a flowing casing pressure of 3,700 PSI during initial production.

The 2-4H follows another Lindsay Wolfcamp A well – the 16-2H – completed in February that posted 30-day production averaging 1,342 Boed at a flowing casing pressure of 3,960 PSI. Both of the Lindsay wells represent early-time production records for WPX’s 1-mile Wolfcamp wells using 1,500-pound completions.

Additionally, three Wolfcamp A wells on WPX’s CBR 32 pad completed in 2015 continue to track in line with the company’s updated type curve. The average 6-month cumulative production for each of the three wells is 146 Mboe. WPX is pilot testing the spacing of seven wells per section on this pad.

WPX’s first completion in the Delaware using 2,000 pounds of sand per foot – the Haley 36-1H – now has cumulative production of 121 Mboe through 120 days. The well is averaging 73 percent oil. Production at the end of April was 868 Boed.

The company followed its first 2,000-pound completion from December with three more trials on the Bunin pad at the end of April. These wells are beginning initial flowback.

WPX drilled eight Wolfcamp A wells (gross) in the Delaware Basin in the first quarter, reducing drilling times by 10 percent vs. a year ago to an average of 34.8 days per well. The company’s vision is to reach 20 days per well in the Wolfcamp.

One of the first-quarter spuds – the CBR 16-7H 1-mile lateral – reached total depth of 15,915 feet in just 24.5 days. Additionally, WPX drilled the lateral portion (4,944 feet) of the Boyd 21-1H well in 3.1 days.

WILLISTON BASIN

WPX’s Williston Basin production comes from the Bakken and Three Forks formations. Approximately 85 percent of the production stream is oil. WPX has one rig deployed in the basin.

As planned, WPX is now deferring Williston completions for the next few months after completing a six-well pad in March. This results in a current inventory of 15 drilled and uncompleted wells. The inventory is expected to increase to 29 by year-end if WPX continues to forego completions in the basin during the second half of the year.

Williston production averaged 26 Mboe per day in the first quarter, which was 5 percent higher than the sequential quarter. LOE averaged $4.50 per barrel in the quarter, down 39 percent vs. $7.43 per barrel a year ago.

WPX drilled four Williston wells (gross) in the first quarter, consisting of two in the Bakken and two in the Three Forks. All four wells were 3-mile laterals. The drilling time per well averaged 24.9 days. The North Segment 6-5-4HW lateral was drilled in just 18.8 days, which is WPX’s best time in the basin. WPX’s previous record for a 3-mile Williston lateral was 21.6 days.

In March, WPX finished completing the six-well Emma Owner pad in 28 days. Half of the wells were completed with 10-million-pound stimulations. The other half were completed with six-million-pound stimulations. All six of the wells are two-mile laterals.

During initial production, the Emma Owner wells produced a peak rate of 14,985 barrels of oil equivalent per day. The 30-day average for the pad remained very strong at 12,367 Boed.

SAN JUAN BASIN

WPX produces oil in the southern end of the San Juan Basin from the Gallup Sandstone and has a legacy natural gas position in the northern end of the basin, including considerable dry Mancos upside at higher commodity prices. WPX has one rig deployed in the basin.

San Juan Basin production averaged 33.1 Mboe per day in the first quarter, which is 10 percent higher than a year ago. Higher natural gas volumes drove the increase. WPX’s LOE for all of its operations in the basin averaged $4.04 per barrel in the first quarter, down 22 percent vs. $5.16 per barrel a year ago.

WPX drilled seven wells (gross) in the Gallup oil play in the first quarter. Drilling on a six-well pad in the West Lybrook unit commenced in February. Completions on the pad are scheduled to begin in May.

WPX is averaging 7.9 days for 1-mile laterals and 8.6 days for 1.5-mile laterals in the San Juan Basin so far this year. WPX’s best time in the basin for a 1.5-mile lateral to date is 7.5 days.

Additionally, WPX received final approval from the Bureau of Land Management to form the Kimbeto Wash unit. WPX has plans for up to 23 laterals in the unit averaging 7,000 feet per lateral. The company now has six federal units approved in its Gallup development area.

THURSDAY WEBCAST

The company’s next webcast takes place on May 5 beginning at 10 a.m. Eastern. Investors are encouraged to access the event and the corresponding slides at www.wpxenergy.com.

A limited number of phone lines also will be available at (844) 215-3288. International callers should dial (615) 247-5915. The conference identification code is 85604672.

UPCOMING CONFERENCE PRESENTATION

WPX CEO Rick Muncrief is scheduled to speak at the Citi 2016 Global Energy and Utilities Conference on Tuesday, May 10, at 11 a.m. Eastern. Please visit www.wpxenergy.com on the day of the event to confirm the time, see the slides and listen to the presentation.

Form 10-Q

WPX plans to file its first-quarter 2016 Form 10-Q with the Securities and Exchange Commission this week. Once filed, the document will be available on the SEC and WPX websites.

About WPX Energy, Inc.

WPX is an oil-focused energy company with operations in the Permian’s Delaware Basin, the Williston Basin and the San Juan Basin. The company has reshaped its holdings through more than $5 billion of transactions and posted double-digit oil volume growth in each of the past four years.

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This press release includes “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical facts, included in this press release that address activities, events or developments that the company expects, believes or anticipates will or may occur in the future are forward-looking statements. Such statements are subject to a number of assumptions, risks and uncertainties, many of which are beyond the control of the company. Statements regarding future drilling and production are subject to all of the risks and uncertainties normally incident to the exploration for and development and production of oil and gas. These risks include, but are not limited to, the volatility of oil, natural gas and NGL prices; uncertainties inherent in estimating oil, natural gas and NGL reserves; drilling risks; environmental risks; and political or regulatory changes. Investors are cautioned that any such statements are not guarantees of future performance and that actual results or developments may differ materially from those projected in the forward-looking statements. The forward-looking statements in this press release are made as of the date of this press release, even if subsequently made available by WPX Energy on its website or otherwise. WPX Energy does not undertake and expressly disclaims any obligation to update the forward-looking statements as a result of new information, future events or otherwise. Investors are urged to consider carefully the disclosure in our filings with the Securities and Exchange Commission, available from us at WPX Energy, Attn: Investor Relations, P.O. Box 21810, Tulsa, Okla., 74102, or from the SEC’s website at www.sec.gov.

WPX Energy, Inc.

Consolidated (GAAP)

(UNAUDITED)

WPX Energy, Inc.

Reconciliation of Adjusted EPS and EBITDAX (NON-GAAP)

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Consolidated Statements of Operations

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Consolidated Balance Sheets

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Consolidated Statements of Cash Flows

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