1 1/51/51Introduction of Introduction of Well Testing TechniquesWell Testing Techniques* *2 2/51/51ContentsContentsuuDefinition, Purposes and Tasks of Well TestDefinition, Purposes and Tasks of Well TestuuDevelopment Phases of Well TestDevelopment Phases of Well TestuuMain Operations of Well TestMain Operations of Well TestuuTechnique of Formation TestTechnique of Formation TestuuTechnique of Surface Well TestTechnique of Surface Well TestuuPreventing Formation Damage during TestingPreventing Formation Damage during Testing3 3/51/51Definition, Purposes and Tasks of Well TestDefinition, Purposes and Tasks of Well TestWell Test is a technologic process performed for those Well Test is a technologic process performed for those possible hydrocarbon or water zones. In this process, possible hydrocarbon or water zones. In this process, using a set of special equipments and tools to reduce using a set of special equipments and tools to reduce the pressure of fluid column in the well, inducing the pressure of fluid column in the well, inducing formation fluids to flow into the well hole and finally formation fluids to flow into the well hole and finally obtaining the data of productivity, pressure, obtaining the data of productivity, pressure, temperature, fluids properties, and other formation temperature, fluids properties, and other formation parameters. parameters. uuDefinitionDefinition4 4/51/511)1) to prove whether the new area and structure have to prove whether the new area and structure have commercial oil and gas.commercial oil and gas.2)2) to determine the level of oil-bearing and gas-bearing, to determine the level of oil-bearing and gas-bearing, oil/gas/water boundaries, production capacity and drive oil/gas/water boundaries, production capacity and drive mechanism in a reservoir.mechanism in a reservoir.3)3) to verify the reliability of logging interpretation. to verify the reliability of logging interpretation.4)4) to obtain data of fluids properties and reservoir physical to obtain data of fluids properties and reservoir physical properties, determine reasonable production program, properties, determine reasonable production program, supply a basis to reserves calculation and development supply a basis to reserves calculation and development planning.planning.Definition, Purposes and Tasks of Well TestDefinition, Purposes and Tasks of Well TestuuPurposes and Tasks of Well TestPurposes and Tasks of Well Test5 5/51/51First PhaseFirst PhaseRepresented by Represented by conventional well testing techniqueconventional well testing technique, featuring , featuring with Wireline Conveyed Perforating(with Wireline Conveyed Perforating(电缆射孔电缆射孔) and Swabbing) and Swabbing（抽汲（抽汲 ）. .Second PhaseSecond PhaseRepresented by Represented by formation tester techniqueformation tester technique, featuring with DST , featuring with DST using MFE, HST, APR, PCT testers.using MFE, HST, APR, PCT testers.Third PhaseThird PhaseRepresented by Represented by combining formation tester technique and other combining formation tester technique and other techniquestechniques, featuring with performing several operation by one , featuring with performing several operation by one trip of pipe string, such as DST+TCP, DST+TCP+SRO (Surface trip of pipe string, such as DST+TCP, DST+TCP+SRO (Surface Read Out), DST+SWT (surface well test), and DST+TCP+EP Read Out), DST+SWT (surface well test), and DST+TCP+EP (ejector pumping) etc.(ejector pumping) etc.Development Phases of Well TestDevelopment Phases of Well Test6 6/51/51uuwiper tripping wiper tripping find bottomfind bottom( (通井、探井底通井、探井底) )uuwell flushing well flushing ( (洗井洗井) )uupressure testing pressure testing ( (试压试压) )uuperforating perforating ( (射孔射孔) )uuformation fluids inducing formation fluids inducing ( (诱导地层流体诱导地层流体) )uuproductivity measuring productivity measuring ( (求产求产) )uuformation pressure measuring formation pressure measuring ( (测压测压) )uuwell killingwell killing ( (压井压井) )uulayer plugging and well abandon layer plugging and well abandon ( (封层和封井封层和封井) )Main Operations of Well TestMain Operations of Well Test7 7/51/51l lRunning wiper tool into well hole to Running wiper tool into well hole to 1)1) wipe and clean out wipe and clean out solid materials adhering on casing wall, solid materials adhering on casing wall, 2)2) check through check through diameter, deformation and breakage of casing, diameter, deformation and breakage of casing, 3)3) check check whether the artificial well bottom meets the needs of well whether the artificial well bottom meets the needs of well test or not, and test or not, and 4)4) adjust the properties of kill fluid to adjust the properties of kill fluid to meet the need of perforation.meet the need of perforation. Wiper Tripping oil and wax adhering on casing wall;2)2) adjust the properties of kill fluid to meet the need of adjust the properties of kill fluid to meet the ne