Study Of The Water Production Characteristics For Horizontal Well In1st Block Of Tahe Oilfield

The1st block of Tahe oilfield is a typical blocklike sandstone reservoir which hasmassive bottom water. Triassic lower oil formation of1st Block of Tahe Oilfieldcontain two Block：1st main Block and S41-1Block，Main reservoir is lower oilformation. In the1st block of Tahe oilfield, The vertical Wells mining, prone to bottomwater coning, reservoir development effect influence overall．For thisreason，Northwest Branch of Sinopec use horizontal wells exploitation in2005quantified (mass) and achieved remarkable results．Horizontal well technology is one of the world s most advanced oil productiontechnologies，Comparison with vertical well Horizontal well has many advantages inincrease the drainage area and enhanced oil recovery,For the development of lowpermeability reservoirs，thin reservoir，complex fault block oil and gas field andheavy oil reservoirs，has proved to be one of the most effective technology．Use of the tahe oilfield geological data,and Rely on oil production, logging, tryproduction dynamic and the reservoir heterogeneity and material. In the fullarrangement, digestion, summarizes predecessors to tahe area research achievements,and on the basis of research on the horizontal well water production characteristics ofthe research work.According to tahe oilfield production from the production data since all, Can putinto production in accordance with the barels oil per day in early, divided into: highproductivity well, middle, low producing well; According to the water rising velocityand moisture content form is divided into: factory font, the S type, linear; According tothe water every day rate (to0.1%for boundary) is divided into: rises fast type, water cutup slow type; According to the characteristics of bottom water drive, from water statusof classification for: bottom water ridge into type, compound model, water saturationrise type. According to the classification of the comprehensive analysis the region indynamic water features, combined with oil producing rate curve, tectonic geologyanalysis such as that of the reservoir water content is the main cause of rising geologicalfactors and engineering factors two aspects.Geological factors for: structurallocation-avoid water height, fault, high penetration segment and put into productiontime; Engineering factor mainly from: adopt liquid strength, horizontal section lengthand put into production time these three aspects to consider the influence factors of theanalysis.According to tahe oilfield, which the current situation composite water cut, oilfield of horizontal Wells and vertical Wells will with comprehensive moisture content(71.7%) were compared. Through the table5-1can see, The horizontal wellcomprehensive water cut on the high side, Production of36mouth,25of horizontalWells of water cut of more than71.7%. As the next step should be the focus of themanagement object.Finally based on the previous geological model, applied the mathematical modelof software eclipse to simulate the reservoir numerical of TK136H TK138H in tahe1stdistrict. Make different strength in liquid, and sealing the different positions ofhorizontal section for high permeability. Through the simulation computation alsoconfirmed: The rational mining liquid strength Adjust and optimize work system, andtimely intervention of horizontal section for high permeability. In theory, extent of tahe1st area is controlled by the well of high water effect.