Based on the waterflooding development in carbonate reservoirs in the Middle East,in order to solve the problem of the poor development effects caused by commingled injection and production,taking the thick bioclastic...Based on the waterflooding development in carbonate reservoirs in the Middle East,in order to solve the problem of the poor development effects caused by commingled injection and production,taking the thick bioclastic limestone reservoirs of Cretaceous in Iran-Iraq as an example,this paper proposes a balanced waterflooding development technology for thick and complex carbonate reservoirs.This technology includes the fine division of development units by concealed baffles and barriers,the combination of multi well type and multi well pattern,and the construction of balanced water injection and recovery system.Thick carbonate reservoirs in Iran-Iraq are characterized by extremely vertical heterogeneity,development of multi-genesis ultra-high permeability zones,and highly concealed baffles and barriers.Based on the technologies of identification,characterization,and sealing evaluation for concealed baffles and barriers,the balanced waterflooding development technology is proposed,and three types of balanced waterflooding development modes/techniques are formed,namely,conventional stratigraphic framework,fine stratigraphic framework,and deepened stratigraphic framework.Numerical simulations show that this technology is able to realize a fine and efficient waterflooding development to recover,in a balanced manner,the reserves of thick and complex carbonate reservoirs in Iran and Iraq.The proposed technology provides a reference for the development optimization of similar reservoirs.展开更多
Simultaneous with the rise of trade protectionism in the twenty-first century has been a resurgence in nationalist politics,most notably in the USA,the UK,and parts of the EU.These developments in international and US...Simultaneous with the rise of trade protectionism in the twenty-first century has been a resurgence in nationalist politics,most notably in the USA,the UK,and parts of the EU.These developments in international and US trade policy,including Washington’s launch of a full-fledged trade war against China in March 2018,have converged disastrously with the outbreak of the novel coronavirus in November 2019 and the onset of a worldwide pandemic.Given the status of the USA as the world’s hegemon since 1945,what is new here is the effort of the Trump administration to abdicate US leadership,-jettison longstanding alliances,and turn back the clock on the country’s close integration with the world economy.Already,greatly reduced flows of goods,services,and people have translated into radically reduced global growth,widespread business disruptions,and high unemployment.Remarkably,the White House has refused to recognize the severity of the pandemic and has undermined the precautions of the US science community.We argue that these multiple shocks constitute a major critical juncture on par with what the world community faced in 1945.However,in the twenty-first century we have seen that high levels of economic uncertainty and political instability have superseded the long-held notion that international interdependence would pull the world community through tough times such as these.Could the triple whammy of a destructive trade war,deadly pandemic,and secular decfine of US leadership trigger a new generation of policy innovation and institution building on par with the post-1945 era?In terms of the global trade regime,it would be difficult to imagine a buoyant recovery of the world economy in the absence of a serious reckoning with the pattern of norm erosion that we identify here.展开更多
基金Supported by the Major Science and Technology Project of CNPC(2023ZZ19-01).
文摘Based on the waterflooding development in carbonate reservoirs in the Middle East,in order to solve the problem of the poor development effects caused by commingled injection and production,taking the thick bioclastic limestone reservoirs of Cretaceous in Iran-Iraq as an example,this paper proposes a balanced waterflooding development technology for thick and complex carbonate reservoirs.This technology includes the fine division of development units by concealed baffles and barriers,the combination of multi well type and multi well pattern,and the construction of balanced water injection and recovery system.Thick carbonate reservoirs in Iran-Iraq are characterized by extremely vertical heterogeneity,development of multi-genesis ultra-high permeability zones,and highly concealed baffles and barriers.Based on the technologies of identification,characterization,and sealing evaluation for concealed baffles and barriers,the balanced waterflooding development technology is proposed,and three types of balanced waterflooding development modes/techniques are formed,namely,conventional stratigraphic framework,fine stratigraphic framework,and deepened stratigraphic framework.Numerical simulations show that this technology is able to realize a fine and efficient waterflooding development to recover,in a balanced manner,the reserves of thick and complex carbonate reservoirs in Iran and Iraq.The proposed technology provides a reference for the development optimization of similar reservoirs.
文摘Simultaneous with the rise of trade protectionism in the twenty-first century has been a resurgence in nationalist politics,most notably in the USA,the UK,and parts of the EU.These developments in international and US trade policy,including Washington’s launch of a full-fledged trade war against China in March 2018,have converged disastrously with the outbreak of the novel coronavirus in November 2019 and the onset of a worldwide pandemic.Given the status of the USA as the world’s hegemon since 1945,what is new here is the effort of the Trump administration to abdicate US leadership,-jettison longstanding alliances,and turn back the clock on the country’s close integration with the world economy.Already,greatly reduced flows of goods,services,and people have translated into radically reduced global growth,widespread business disruptions,and high unemployment.Remarkably,the White House has refused to recognize the severity of the pandemic and has undermined the precautions of the US science community.We argue that these multiple shocks constitute a major critical juncture on par with what the world community faced in 1945.However,in the twenty-first century we have seen that high levels of economic uncertainty and political instability have superseded the long-held notion that international interdependence would pull the world community through tough times such as these.Could the triple whammy of a destructive trade war,deadly pandemic,and secular decfine of US leadership trigger a new generation of policy innovation and institution building on par with the post-1945 era?In terms of the global trade regime,it would be difficult to imagine a buoyant recovery of the world economy in the absence of a serious reckoning with the pattern of norm erosion that we identify here.
