In the Jiaoshiba block of the Fuling shale gas field,the employed reserves and recovery factor by primary well pattern are low,no obvious barrier is found in the development layer series,and layered development is dif...In the Jiaoshiba block of the Fuling shale gas field,the employed reserves and recovery factor by primary well pattern are low,no obvious barrier is found in the development layer series,and layered development is difficult.Based on the understanding of the main factors controlling shale gas enrichment and high production,the theory and technology of shale gas three-dimensional development,such as fine description and modeling of shale gas reservoir,optimization of three-dimensional development strategy,highly efficient drilling with dense well pattern,precision fracturing and real-time control,are discussed.Three-dimensional development refers to the application of optimal and fast drilling and volume fracturing technologies,depending upon the sedimentary characteristics,reservoir characteristics and sweet spot distribution of shale gas,to form"artificial gas reservoir"in a multidimensional space,so as to maximize the employed reserves,recovery factor and yield rate of shale gas development.In the research on shale gas three-dimensional development,the geological+engineering sweet spot description is fundamental,the collaborative optimization of natural fractures and artificial fractures is critical,and the improvement of speed and efficiency in drilling and fracturing engineering is the guarantee.Through the implementation of three-dimensional development,the overall recovery factor in the Jiaoshiba block has increased from 12.6%to 23.3%,providing an important support for the continuous and stable production of the Fuling shale gas field.展开更多
Since the 13th Five-Year Plan,Sinopec has been thoroughly carrying out the new energy security strategy of“four revolutions and one cooperation”and the spirit of the important instruction of“powerful promotion of p...Since the 13th Five-Year Plan,Sinopec has been thoroughly carrying out the new energy security strategy of“four revolutions and one cooperation”and the spirit of the important instruction of“powerful promotion of petroleum exploration and development”.Focusing on strategic breakthrough and large-scale reserve increase,the petroleum exploration enhances the theoretical and technological innovation and highlights high-quality exploration battles,so that a series of important petroleum exploration achievements have been gained.In order to accelerate and promote the development of Sinopec's natural gas business,this paper forecasts Sinopec's exploration direction and development potential of natural gas in the future after comprehensively sorting out the achievements and theoretical and technological progresses of natural gas exploration since the 13th Five-Year Plan.And the following research results are obtained.First,since the 13th Five-Year plan,Sinopec has been persisting in the strategic deployment of“balancing marine and continental facies and focusing conventional and unconventional resources”.According to the idea of“extending marine conventional gas,strengthening marine shale gas and optimizing continental tight gas”,Sinopec innovatively develops the hydrocarbon accumulation theory of marine shale gas in southern China,marine carbonate rock in central-western China and tight clastic rock in central-western China.Second,by virtue of researches,a 3D seismic exploration technology with reservoir identification and description as the basis and sweet spot prediction as the core is developed,and several support equipment and tools are integrated,such as deep and ultra-deep drilling and completion,acid fracturing testing,long horizontal well fracturing and high power electric fracturing,and drillable composite bridge plug.Third,a series of natural gas exploration achievements are obtained in three major fields of marine shale,marine carbonate rock and continental tight clastic rock,and new proven natural gas reserves of 1.0068×1012 m3 is achieved,which provides Sinopec with high-quality resource guarantee for the fast increase of natural gas production.Fourth,looking forward,there are abundant natural gas resource bases in Sinopec's licenses,and the main development directions of its natural gas exploration are marine carbonate rock in central-western China,tight clastic rock and shale in central-western China,marine deep clastic rock,and deep clastic rock and igneous rock in the mature areas of eastern China.In conclusion,Sinopec's new proven natural gas reserves during the 14th Five-Year Plan is predicted to be 1.16×10^(12)-1.36×10^(12) m^(3),which can provide a solid resources base for the great development of natural gas in China.展开更多
An understanding of the particle transport characteristics in a branched network helps to predict the particle distribution and prevent undesired plugging in various engineering systems.Quantitative analysis of partic...An understanding of the particle transport characteristics in a branched network helps to predict the particle distribution and prevent undesired plugging in various engineering systems.Quantitative analysis of particle flow characteristics is challenging in that experiments are expensive and particle flow is difficult to detect without disturbing the flow.To overcome this difficulty,man-made fractal tree-like branched networks were built,and a coupled computational fluid dynamic and discrete element method model was applied.A series of numerical simulations was carried out to analyze the influence of fractal structure parameters of networks on the particle flow characteristics.The joint influence of inertial,shunt capacity and superposition from upstream branches on particle flow was investigated.The injection position at the inlet determined the particle velocity and its future flow path.The particle density ratio,particle size and bifurcation angle had a greater influence on the shunting of K2 branches than that in the K1 level and N_(k22)/N_(k21) reached a maximum at 60°.Compared with a network with an even number of branches,there was a preferential branch when the branch number was odd.The preferential branch effect or asymmetry degree of the level(K2)branches had a more significant impact on particle shunting than that from the upstream branches(K1).展开更多
基金Supported by the Sinopec Science and Technology Project(P22183).
文摘In the Jiaoshiba block of the Fuling shale gas field,the employed reserves and recovery factor by primary well pattern are low,no obvious barrier is found in the development layer series,and layered development is difficult.Based on the understanding of the main factors controlling shale gas enrichment and high production,the theory and technology of shale gas three-dimensional development,such as fine description and modeling of shale gas reservoir,optimization of three-dimensional development strategy,highly efficient drilling with dense well pattern,precision fracturing and real-time control,are discussed.Three-dimensional development refers to the application of optimal and fast drilling and volume fracturing technologies,depending upon the sedimentary characteristics,reservoir characteristics and sweet spot distribution of shale gas,to form"artificial gas reservoir"in a multidimensional space,so as to maximize the employed reserves,recovery factor and yield rate of shale gas development.In the research on shale gas three-dimensional development,the geological+engineering sweet spot description is fundamental,the collaborative optimization of natural fractures and artificial fractures is critical,and the improvement of speed and efficiency in drilling and fracturing engineering is the guarantee.Through the implementation of three-dimensional development,the overall recovery factor in the Jiaoshiba block has increased from 12.6%to 23.3%,providing an important support for the continuous and stable production of the Fuling shale gas field.
基金Project supported by the National Major Science and Technology Project"Target Evaluation and Exploration Technology for Shale Gas Zone"(No.2017ZX05036).
文摘Since the 13th Five-Year Plan,Sinopec has been thoroughly carrying out the new energy security strategy of“four revolutions and one cooperation”and the spirit of the important instruction of“powerful promotion of petroleum exploration and development”.Focusing on strategic breakthrough and large-scale reserve increase,the petroleum exploration enhances the theoretical and technological innovation and highlights high-quality exploration battles,so that a series of important petroleum exploration achievements have been gained.In order to accelerate and promote the development of Sinopec's natural gas business,this paper forecasts Sinopec's exploration direction and development potential of natural gas in the future after comprehensively sorting out the achievements and theoretical and technological progresses of natural gas exploration since the 13th Five-Year Plan.And the following research results are obtained.First,since the 13th Five-Year plan,Sinopec has been persisting in the strategic deployment of“balancing marine and continental facies and focusing conventional and unconventional resources”.According to the idea of“extending marine conventional gas,strengthening marine shale gas and optimizing continental tight gas”,Sinopec innovatively develops the hydrocarbon accumulation theory of marine shale gas in southern China,marine carbonate rock in central-western China and tight clastic rock in central-western China.Second,by virtue of researches,a 3D seismic exploration technology with reservoir identification and description as the basis and sweet spot prediction as the core is developed,and several support equipment and tools are integrated,such as deep and ultra-deep drilling and completion,acid fracturing testing,long horizontal well fracturing and high power electric fracturing,and drillable composite bridge plug.Third,a series of natural gas exploration achievements are obtained in three major fields of marine shale,marine carbonate rock and continental tight clastic rock,and new proven natural gas reserves of 1.0068×1012 m3 is achieved,which provides Sinopec with high-quality resource guarantee for the fast increase of natural gas production.Fourth,looking forward,there are abundant natural gas resource bases in Sinopec's licenses,and the main development directions of its natural gas exploration are marine carbonate rock in central-western China,tight clastic rock and shale in central-western China,marine deep clastic rock,and deep clastic rock and igneous rock in the mature areas of eastern China.In conclusion,Sinopec's new proven natural gas reserves during the 14th Five-Year Plan is predicted to be 1.16×10^(12)-1.36×10^(12) m^(3),which can provide a solid resources base for the great development of natural gas in China.
基金Thig work was supportcd by the National Scicnce and Tech nology Major Project of the Ministry of Science and Technology of China(20172X05009-001)the National Natural Science Foun dation of China(No.J1930001,Nu.J1074208,Nu.J1304270,No.51504277.No.51774308 and No.51904321)+2 种基金the Shan dong Provincial Natural Science Foundation(ZR2019JQ21)the ulnllleltdl Resedltl Fulids fU1 the Celldl Uliveisities(Nu.17CX02008A,No.17CX05003,No.18CX02031A,No.18CX07012A and No.19CX05002A)Key Research and Development Plan of Shandong PToVince(2018GSF116009).
文摘An understanding of the particle transport characteristics in a branched network helps to predict the particle distribution and prevent undesired plugging in various engineering systems.Quantitative analysis of particle flow characteristics is challenging in that experiments are expensive and particle flow is difficult to detect without disturbing the flow.To overcome this difficulty,man-made fractal tree-like branched networks were built,and a coupled computational fluid dynamic and discrete element method model was applied.A series of numerical simulations was carried out to analyze the influence of fractal structure parameters of networks on the particle flow characteristics.The joint influence of inertial,shunt capacity and superposition from upstream branches on particle flow was investigated.The injection position at the inlet determined the particle velocity and its future flow path.The particle density ratio,particle size and bifurcation angle had a greater influence on the shunting of K2 branches than that in the K1 level and N_(k22)/N_(k21) reached a maximum at 60°.Compared with a network with an even number of branches,there was a preferential branch when the branch number was odd.The preferential branch effect or asymmetry degree of the level(K2)branches had a more significant impact on particle shunting than that from the upstream branches(K1).
