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In early March, Liaohe Oilfield Shuguang Refinery Technology Research Institute successfully carried out the plugging technology test on Du 16 Block Shu 3-02-4 thin oil wells with daily output of only 0.1 ton. The application of this technology, the highest daily output of 6.2 tons of wells, the average daily output remained at 3.6 tons. "The use of anti-blockage techniques in thin oil sand wells can make it harder to untangle the sand and make the wells sands even more severe." For this reason, thin oil sand wells have become a forbidden area for all types of plugging technologies. "March 22 Day, Liaohe Oilfield Shuguang refinery technical staff said. Chang Yingjun, the project leader, told the reporter that after the "double high" period of thin oil sand production wells, the type of oil well plugging is no longer a single debris particle, but shows the deposition of heavy components, swelling of clay minerals, waxing and scaling "Diversified state." Therefore, the past, a single solution blocking agent has been unable to meet production needs. In order to solve the clogging problem of thin oil sand wells, technical personnel to strengthen technical research, developed a new plugging agent formula system. The plugging agent can not only block the oil layer formed by the expansion of clay and the migration of particles under the condition of no sanding from the oil layer, but also block the formation of the oil layer by precipitating waxy and colloidal organic matter. According to the site, Shu 3-02-4 well is Du 16 blocks of thin oil sand production wells, the mining layer is Dujiatai reservoir, mining section of 1635.8 meters to 1734 meters, formation sand content of 10.2%, the initial average 5.2 tons of Nissan, Nissan 2.9 tons of crude oil. The end of 2009, the well production continued to decline. Earlier this year, the lowest daily yield of the well was only 0.1 tons. The well near the well bore clay swelling and well waxing serious. Technical staff "right remedy", according to the cause of the blockage in the plugging agent system by adding anti-swelling agent and anti-wax components, measures immediate effect. Oil wells up to 12 tons of liquid production, crude oil output up to 6.2 tons. The new plugging agent not only lifted the reservoir blockage, but also solved the "pull out the radish with mud" well sanding problems.
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