Research On Enhancing The Cementing Quality Technology Of The Tertiary Infilling Adjustment Well Of Daqing Oil Field

The target of the tertiary infilling well of Daqing oil-filed is the thin-poor oil-layers. The outstanding features of these layers are thin interlayer, poor properties, low permeability and interlayer diversity. Therefore, we suggest that highly desires of cementing quality be needed to tertiary infilling well. That's to say, all thin layer must be cemented well and the cement cementation-factor of the perforation interval must be greater or equal to 0.8. At present, sonic-logging of the cementing quality, especially delaying sonic-logging doesn't meet completely the demand of the oil-field exploitation. Which means that we must abandoned some oil-layers for the cementing quality is beyond our request. This influences directly to the tertiary infilling well.According to research on enhancing the cementing quality technology of the tertiary infilling adjustment well and the summary of the present technical measures, we have attained new technique. So the cementing quality of tertiary infilling well can be approved and the purpose of tertiary infilling also can be assured.Through the research of weighted cleaning spacer fluid, drilling, pressure release technology,casing clusters'center degree, cementing quality analog prediction system, as well as cyclone maker, the purpose of improving delayed AWVD cementing quality has achieved.