Consequently, Gulf Arab economies will probably enjoy their best environment for growth since the oil price crash.
"The surge in oil prices over the past few months ... is likely to tempt policymakers to loosen fiscal policy further," said Jason Tuvey, senior emerging markets economist at London-based Capital Economics.
"Most governments are currently in the process of preparing their budgets for 2019 and the backdrop of higher oil prices means that the authorities are likely to put forward plans to raise spending significantly next year. That should help to support growth in non-oil sectors."
Saudi Arabia has already said it plans to increase state spending over 7 percent next year, and on Tuesday, it appeared to loosen fiscal policy slightly in an announcement on annual allowances for state employees.
The poll of 17 economists projected Saudi gross domestic product would grow 2.0 percent this year, 2.5 percent in 2019 and 3.0 percent in 2020, after shrinking 0.9 percent last year, its first decline since the global financial crisis in 2009.
Growth in the United Arab Emirates, Kuwait and Qatar is also expected to accelerate in 2019 and rise further or maintain that level in 2020. The UAE's GDP is predicted to expand 3.1 percent next year and 3.5 percent in 2020, after 2.5 percent this year.
Nevertheless, growth in the region is not likely to come close to rates seen in the boom years. Saudi Arabia averaged over 5 percent in the five years through 2014; the UAE averaged 4.5 percent.
One reason is that private sectors have been hurt by the slump of the last few years; companies across the region are cautious in hiring and real estate prices are sinking. Also, U.S. monetary tightening is lifting Gulf interest rates.
Meanwhile, many economists do not expect oil prices to keep rising in the long term, so governments will save rather than spend much of their windfall revenues. Capital Economics, for example, forecasts oil will fall back to $60 by the end of next year and $55 by the end of 2020.
It is too early to say whether the international furore over the disappearance of dissident Saudi journalist Jamal Khashoggi will have any effect on the Saudi economy, analysts said, but it could slow foreign investment and therefore growth.
The two smallest and financially weakest members of the six-nation Gulf Cooperation Council, Bahrain and Oman, are not expected to see a surge in growth next year because their state spending is constrained by big budget deficits.
Bahrain this month obtained commitments from its rich Gulf allies for a $10 billion, multi-year aid package, but that is tied to deficit-cutting reforms that are to include spending reductions in some areas.
Bahrain's GDP growth is expected to edge down to 2.8 percent next year and 2.6 percent in 2020 from 2.9 percent this year. Oman's growth is projected to slip to 3.0 percent and 2.7 percent from 3.1 percent.
(Polling by Khushboo Mittal and Anisha Sheth, editing b Larry King) ((email@example.com; +9715 6681 7277; Reuters Messaging: firstname.lastname@example.org))