Application of Enhanced Energy Fracturing Technology in Wuqi Oil Production Plant of Yanchang Oilfield
The low permeability tight oil reservoir in Wuqi oilfield is resources rich with over 80 million tons of geological reserves,but the tight oil reservoir has poor physical properties,porosity below 10％,permeability less than 0.3 mD,no natural production capacity of oil wells,conventional fracturing technology has low transformation degree,small swept volume,low productivity and poor oil stability,so it is difficult to achieve effective economic use.Combined with the geological characteristics of the oil reservoir,the enhanced energy fracturing technology of"large pre-fluid+surface activator+volume fracturing"with large fluid volume,large displacement,low sand ratio and braised well displacement is studied.The technology has been implemented 39 well times,with an average daily oil production of 4.33 t per well,which is 4.01 times higher than that of conventional fracturing wells with an average daily oil production of 1.08 t per well.Oilfield fracturing technology has played a significant role in improving the efficiency of oil and gas resource development.It can not only significantly increase the production of tight oil in the initial stage of production,ensure that the oil well can maintain a stable output level for a longer period of time,significantly extend the life cycle of the oil well in the stable production stage,but also effectively improve the actual utilization efficiency of proven reserves and optimize the overall development effect of the oil reservoir,so that more oil and gas resources that are difficult to be economically exploited can be fully released and rationally used.
low permeabilitytight oilenhanced energy fracturingvolume fracturing
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