Underground Work Minor Repair Equipment Bridge Plug Drilling Technology Research And Application

Oil is important to promote the development of national industry,to promote economic progress has irreplaceable position.As China's largest oil region,daqing oil field production and national economic development are closely linked.In daqing oil field,however,also face the grim problem of resources,the daqing remaining recoverable reserves of about 197 million tons,according to the mining speed calculation,now only can satisfy the production time of five years or so.Resource depletion but demand continues to increase,except to find new oil resource,improve mining technology,also has become one of the important work of oil enterprises.Daqing area of songliao basin and its surrounding a series of basin of the communist party of China contains four sets of oil and gas layer,the daqing oil field is only half of the second layer has carried on the full mining,daqing mining ability is the most need to pay attention to details.Through the study found that many of the old oil field in the mining,domestic because some development layer inhomogeneous features,in oil field into the homework,water content rising quickly,make the well section water,directly affect oilfield development effect,so it is necessary for oilfield blockade.Early blockade technique using note ash,due to the thickness of interlayer and pressure control,so in the face of the interlayer thinner or high pressure sealing layer,gray surface is not easy to grasp,the success rate is low,the cost is higher.At present,daqing oilfield has many to salvage the bridge plug,but as a result of prior to this step is not seriously,cause most of the bridge plug information is insufficient,there is no way for the choice of the ways of fishing tool and salvage.Bridge plug in the underground for a long time will be affected by the medium corrosion occurs,with the passage of time,the bridge plug of salvage work harder.According to the existing drillable bridge plug and can make bridge plug technology on the experimental study of daqing oilfield,in order to solve the reality of underground work minor repair equipment drill for bridging technology problem.And the work smoothly will also help the country's economic development.In this study,"old bridge plug in terms of data entry and save incomplete,lead to cannot choose fishing tool;bridge plug action such as the environment of formation fluid,oil and gas for a long time under the influence of bridge plug in connector corrosion in severe cases,cause when the salvage salvage it unable to form a complete set of special tools,so far,drillable bridge plug is not equipped with auxiliary fishing tool\" of the three problems as the starting point,take the corresponding experiment,put forward before the salvage,should bethe tool to deal with wellbore and bridge plug,and then by stamping confirm the type of the bridge plug,to select suitable fishing tool.In addition,also analyzes the drilling bridge plug of countermeasures.