The anticline is large in size and gentle.an individual structure covers an area up to 100-300.km*.At top of mudcone little tensional faults are often associated.The mudcones themselves are either possible source rock...The anticline is large in size and gentle.an individual structure covers an area up to 100-300.km*.At top of mudcone little tensional faults are often associated.The mudcones themselves are either possible source rock bodies or hydrocarbon-draining.pressure-releasing paths.Natural gas migrated upwards along mudcone diapir zone and faults.and accumulated in the upper structural.traps.The already drilled Dongfang 1-1 and Ledong 15-1 Structures are identified to bre gas-bearing structures.Some structures similar to them.such as Cangjiang 29-1.Ledong 8-3 and Ledong 16-1 Structures.are today's exploration targets.Most of this type of traps contain gas.But three aspects still need to be studied in future:firstly.overpressure and high-temperature result in difficulties of drilling engineering:secondly,reservoirs do not develop very well or are not high-quality:thirdly.there is non-hydrocarbon gas such as CO2 to be.associated with.so the fluid properties are more complicated.展开更多
文摘The anticline is large in size and gentle.an individual structure covers an area up to 100-300.km*.At top of mudcone little tensional faults are often associated.The mudcones themselves are either possible source rock bodies or hydrocarbon-draining.pressure-releasing paths.Natural gas migrated upwards along mudcone diapir zone and faults.and accumulated in the upper structural.traps.The already drilled Dongfang 1-1 and Ledong 15-1 Structures are identified to bre gas-bearing structures.Some structures similar to them.such as Cangjiang 29-1.Ledong 8-3 and Ledong 16-1 Structures.are today's exploration targets.Most of this type of traps contain gas.But three aspects still need to be studied in future:firstly.overpressure and high-temperature result in difficulties of drilling engineering:secondly,reservoirs do not develop very well or are not high-quality:thirdly.there is non-hydrocarbon gas such as CO2 to be.associated with.so the fluid properties are more complicated.
