The Research Of Profiel Technology Of Jianyucha Oilfield

Jianyucha Oilfield is typical of low permeability reservoir, it has been more than5years since it waterflooded, reservoir pore structure and permeability of Jianyucha Oilfield hasundergone great changes. The tradiction between the layers or in the layer is furtherexacerbated.It comes into being the seepage advantage channels and high permeability.Notonly the distribution of remaining oil but also the situation of water flooding has becomeincreasingly complex.To keep a stable productivity is becoming increasingly difficult, Watercut of83%. This not only leads to the increase of production cost, but also affects the oilrecovery rate. The water channel or high permeability sandstone formation must be blockedfor enhancing oil recovery.Deep profile control technology as an effective means to reduce thewell water content and enhanced oil recovery, has become the key to sustainable developmentof Jianyucha Oilfield.In this paper, Jianyucha Oilfield is the object of the study.After the research of the statusof profile control technology studies and application at home and abroad,and thecomprehensive study of reservoir characteristics and the developing dynamic, it develops theresearch of profiel technology of Jianyucha Oilfield, profile control agents have been preferredand evaluated through laboratory experiments,eventually filter out two suitable profile controlsystems: amphion weak gel profile control agent and the flexible slow expansion particles forhigh-salinity reservoirs.In order to make the study practical significance and morerepresentative,two injection wells of this Oilfield have been selected to make field pilot test.The effect of profile modification is that the oillayers absorbent sections have been revisedafter profile control. The thickness of absorbent layers has been increased and the absorbentrate of high-permeability layers has been limited. Absorbent capacity of low-permeabilitylayers have been strengthened. Moreover, due to starting pressure increasing, all wellsabsorbent layers become thick. Plane unformity has been adjusted.The oil wells increase oilproduction and decease water production. It is valid for more than six months, the input-outputratio of comprehensive cost test refinery about1to3, it gains good economic benefit.