渤海油田浓变凝胶防砂控水技术研究与应用

针对渤海油田高含水易出砂油井防砂、控水技术需求及目前机械防砂控水一体化技术的局限性,提出应用浓变凝胶实现防砂控水一体化的技术路线.通过开展浓变凝胶控砂性能与控水性能测试,验证选择性控水与防砂一体化技术实施可行性,基于浓变凝胶对储层条件与生产条件适应性评价明确浓变凝胶防砂控水的适应范围,最终形成浓变凝胶防砂控水一体化技术...

Research and Application of Gel Sand Control and Water Control Technology in Bohai Oilfield

In view of the demand of sand and water control technology for high water?cut sand producing oil wells in Bohai oilfield,and the limitations of the current integrated technology of mechanical sand and water control, the technical route of integrating sand and water control with the application of flooding?sensitive gel is proposed.The feasibility of the integrated technology of selective water and sand control was demonstrated through testing the sand and water control performance of the flooding?sensitive gel. Based on the evaluation of the adaptability of the flooding?sensitive gel to the reservoir conditions and production conditions,the adaptability range of the flooding?sensitive gel for sand control and water control was clarified. Then the integrated technology of thickened gel for sand and water control was finally formed.The results show that the reservoir permeability damage and sand production rate can be controlled within 13% and 0.03%,respectively.The reservoir and water layer can be selectively blocked. The adaptability evaluation results showed that the temperature resistance of the flooding?sensitive gel was higher than 80 ℃, the salinity was 45 000 mg/L,and the maximum extraction strength was 257.6 m³/（d?m）.With the application of the integrated technology of sand and water control in Z oilfield of Bohai Sea, the sand control period reaches 13~16 months with continuous effectiveness, the water cut is reduced by 3%~5% compared with previous testing results. The daily oil production is increased by 88.48% on average,and the extraction range reaches more than 50%.The integrated technology of flooding?sensitive gel sand and water control provides an idea for oil increase in high water cut sand production wells in offshore oil fields.