Research On The Characteristics Of Production Capacity And Main Factors Of Productivity Control Factors In North American SDA Shale Reservoirs

Taking the Sinopec North America SDA project WDFD layer as an example,the shale oil production characteristics and main productivity control factors were discussed.According to statistical data and grey correlation analysis,the oil production plane of the WDFD shale oil formation is quite different.The single wells in the southwest and southeast regions have a relatively high output,and the initial production declines rapidly.The later production capacity is stable at a relatively low level relative to the initial production.In the northeastern region and in the fault region,the amount of liquid produced is the highest,and the lifting method has a great influence on the amount of liquid produced.In the early stage of the new well,the water content was high,the water content changed smoothly,and the extra-high water-bearing area was distributed.Wells are divided into four types of oil wells.Types 1 and 2 oil wells are mainly concentrated in the southwest of the strata system.,Main productivity control factors were discussed according to statistical data and grey correlation analysis,WDFD production capacity is mainly affected by shale reservoir thickness,thickness of the lower compartment,fault and fracture distribution,length of horizontal well interval,brittleness index,scale of fracturing,moisture content,and ratio of gas to oil.About theses four regions.In the southwest region where the thickness of the reservoir is large and the thickness of the lower compartment is large,the fracturing scale can be appropriately increased.The fracture is an important factor affecting the oil and gas production capacity,and drilling should avoid drilling into the fault.The thickness of the lower compartment in the northeast region is relatively small,and the current average water content reaches 98%,and the scale of fracturing should be controlled.In the southeast region,the reservoir has good physical properties but the fractures are not developed.It is appropriate to increase the length of horizontal wells and to appropriately control the scale of fracturing.The pressure in the original formation in the northwest region is high,and the production capacity is mainly affected by the fracture.