Fort Worth盆地Barnett页岩气藏的成功开发,极大地推动了全球页岩气勘探开发进程。分析北美地区已开发页岩气聚集区带油气地质特征,了解区域地质背景,有助于建立页岩气富集模式、寻找有效页岩气储层、确定"甜点"边界、提高采...Fort Worth盆地Barnett页岩气藏的成功开发,极大地推动了全球页岩气勘探开发进程。分析北美地区已开发页岩气聚集区带油气地质特征,了解区域地质背景,有助于建立页岩气富集模式、寻找有效页岩气储层、确定"甜点"边界、提高采收率等。研究表明,北美克拉通盆地、前陆盆地侏罗系、泥盆系—密西西比系富集多种成因、多种成熟度页岩气资源,页岩产层通常是含油气系统中主力烃源岩,尤以受上升洋流影响、具有低能还原环境的海进体系域黑色页岩(腐泥型—混合型干酪根)为佳。沉积环境和热成熟度是页岩气富集区带主要控制因素,裂缝网络发育程度决定能否获取丰厚的商业价值。因此,古气候、古地理条件以及沉积环境、构造作用等因素的综合,使得北美页岩气资源形成并不断得到有效开发。展开更多
In recent years,the Fuxian area in the southeastern Ordos Basin has undergone significant exploration,with industrial gas flow tested in wells drilled into the Ordovician marine carbonates.Despite this,the gas accumul...In recent years,the Fuxian area in the southeastern Ordos Basin has undergone significant exploration,with industrial gas flow tested in wells drilled into the Ordovician marine carbonates.Despite this,the gas accumulation patterns of this area are not fully understood,posing challenges for further exploration.Our analysis of geological conditions indicates that the Ordovician Majiagou Formation in this area hosts two gas plays:one found in weathering crusts and the other found in interior of the formation.We investigated various typical gas reservoirs in the area,focusing on differentiating the geological conditions and factors controlling gas accumulation in the weathering-crust and interior gas reservoirs.The results suggest three primary gas accumulation patterns in the Majiagou Formation in the Fuxian area:(1)upper gas accumulation in weathering crusts,present in the high parts of landforms such as residual paleo-hills or buried paleo-platform(Pattern I);(2)the stereoscopic pattern with gas accumulation in both weathering crusts and strata interior,arising in high parts of landforms such as residual paleo-hills or buried paleo-platforms(Pattern II);(3)lower gas accumulation in strata interior,occurring in the upper reaches and on both sides of paleo-trenches(Pattern III).This study will serve as a geological basis for future exploration deployment in the Fuxian area.展开更多
Weiyuan shale gas play is characterized by thin high-quality reservoir thickness,big horizontal stress difference,and big productivity differences between wells.Based on integrated evaluation of shale gas reservoir ge...Weiyuan shale gas play is characterized by thin high-quality reservoir thickness,big horizontal stress difference,and big productivity differences between wells.Based on integrated evaluation of shale gas reservoir geology and well logging interpretation of more than 20 appraisal wells,a correlation was built between the single well test production rate and the high-quality reservoir length drilled in the horizontal wells,high-quality reservoir thickness and the stimulation treatment parameters in over 100 horizontal wells,the dominating factors on horizontal well productivity were found out,and optimized development strategies were proposed.The results show that the deployed reserves of high-quality reservoir are the dominating factors on horizontal well productivity.In other words,the shale gas well productivity is controlled by the thickness of the high-quality reservoir,the high-quality reservoir drilling length and the effectiveness of stimulation.Based on the above understanding,the development strategies in Weiyuan shale gas play are optimized as follows:(1)The target of horizontal wells is located in the middle and lower parts of Longyi 11(Wei202 area)and Longyi 11(Wei204 area).(2)Producing wells are drilled in priority in the surrounding areas of Weiyuan county with thick high-quality reservoir.(3)A medium to high intensity stimulation is adopted.After the implementation of these strategies,both the production rate and the estimated ultimate recovery(EUR)of individual shale gas wells have increased substantially.展开更多
From 2012-06-04 to 2012-06-08, the 25th World Gas Conference, with the theme of “Gas： Sustaining Future Global Growth” , was held in Kuala Lumpur, Malaysia. The attendees exchanged and summarized the development of...From 2012-06-04 to 2012-06-08, the 25th World Gas Conference, with the theme of “Gas： Sustaining Future Global Growth” , was held in Kuala Lumpur, Malaysia. The attendees exchanged and summarized the development of the natural gas sector from 2009 to 2012 and its future trend. With its rapid development in the world, natural gas will play a more important role in future energy development： Natural gas is evolving into an irreplaceable clean energy in the primary energy mix; The pattern of supply and demand of natural gas in the world will be changed following the exploitation of unconventional natural gas.展开更多
基金supported the National Natural Science Foundation of China(Nos.:U19B6003,U20B6001)the Class A Strategic Pilot Science and Technology Program of the Chinese Academy of Sciences(No.:XDA14000000)a project entitled Oil and Gas Enrichment Rules and Favorable Target Selection in the Iran-Iraq region initiated by the Sinopec Science and Technology Department.
文摘In recent years,the Fuxian area in the southeastern Ordos Basin has undergone significant exploration,with industrial gas flow tested in wells drilled into the Ordovician marine carbonates.Despite this,the gas accumulation patterns of this area are not fully understood,posing challenges for further exploration.Our analysis of geological conditions indicates that the Ordovician Majiagou Formation in this area hosts two gas plays:one found in weathering crusts and the other found in interior of the formation.We investigated various typical gas reservoirs in the area,focusing on differentiating the geological conditions and factors controlling gas accumulation in the weathering-crust and interior gas reservoirs.The results suggest three primary gas accumulation patterns in the Majiagou Formation in the Fuxian area:(1)upper gas accumulation in weathering crusts,present in the high parts of landforms such as residual paleo-hills or buried paleo-platform(Pattern I);(2)the stereoscopic pattern with gas accumulation in both weathering crusts and strata interior,arising in high parts of landforms such as residual paleo-hills or buried paleo-platforms(Pattern II);(3)lower gas accumulation in strata interior,occurring in the upper reaches and on both sides of paleo-trenches(Pattern III).This study will serve as a geological basis for future exploration deployment in the Fuxian area.
文摘Weiyuan shale gas play is characterized by thin high-quality reservoir thickness,big horizontal stress difference,and big productivity differences between wells.Based on integrated evaluation of shale gas reservoir geology and well logging interpretation of more than 20 appraisal wells,a correlation was built between the single well test production rate and the high-quality reservoir length drilled in the horizontal wells,high-quality reservoir thickness and the stimulation treatment parameters in over 100 horizontal wells,the dominating factors on horizontal well productivity were found out,and optimized development strategies were proposed.The results show that the deployed reserves of high-quality reservoir are the dominating factors on horizontal well productivity.In other words,the shale gas well productivity is controlled by the thickness of the high-quality reservoir,the high-quality reservoir drilling length and the effectiveness of stimulation.Based on the above understanding,the development strategies in Weiyuan shale gas play are optimized as follows:(1)The target of horizontal wells is located in the middle and lower parts of Longyi 11(Wei202 area)and Longyi 11(Wei204 area).(2)Producing wells are drilled in priority in the surrounding areas of Weiyuan county with thick high-quality reservoir.(3)A medium to high intensity stimulation is adopted.After the implementation of these strategies,both the production rate and the estimated ultimate recovery(EUR)of individual shale gas wells have increased substantially.
文摘From 2012-06-04 to 2012-06-08, the 25th World Gas Conference, with the theme of “Gas： Sustaining Future Global Growth” , was held in Kuala Lumpur, Malaysia. The attendees exchanged and summarized the development of the natural gas sector from 2009 to 2012 and its future trend. With its rapid development in the world, natural gas will play a more important role in future energy development： Natural gas is evolving into an irreplaceable clean energy in the primary energy mix; The pattern of supply and demand of natural gas in the world will be changed following the exploitation of unconventional natural gas.
