Purpose:.To discuss the incidence and clinical features of early and mid-late elevated intraocular pressure after pars plana vitrectomy and silicone oil injection, and to evaluate the clinical management of eyes with ...Purpose:.To discuss the incidence and clinical features of early and mid-late elevated intraocular pressure after pars plana vitrectomy and silicone oil injection, and to evaluate the clinical management of eyes with secondary glaucoma.Methods:.This was an observational consecutive case series of 691 eyes in 679 patients who were treated with pars plana vitrectomy and silicone injection...The diagnostic criteria of early elevated intraocular pressure after silicone oil injection was ≥21 mmHg two weeks after surgery, while mid-late elevated intraocular pressure was ≥21 mmHg after two weeks.The incidence and clinical management of elevated intraocular pressure were analyzed.Results: In total, 211 of 691 eyes(30.54%) developed elevated intraocular pressure two weeks after pars plana vitrecto my and silicone injection. Of the 211 eyes, 101 eyes(47.87%)had ocular inflammation, 64 eyes(30.33%) showed hyphema,35 eyes(16.59%) had silicone oil in the anterior chamber, 6eyes.(2.84%).had excess silicone oil injected,.and 5 eyes(2.37%).had rubeosis irides..Eighty three of 691 eyes(12.01%).developed elevated intraocular pressure after two weeks..Of these 83 eyes, 25 eyes(30.12%) had rubeosis irides,.16 eyes(19.27%) had issues related to topic steroid therapy,.13 eyes.(15.66%).had a papillary block,.silicone oil in the anterior chamber,10 eyes(12.05%) had a silicone emulsion,.10 eyes(12.05%).had peripheral anterior synchiae,.and 9 eyes(10.84%).had silicone oil in the anterior chamber..All eyes with elevated intraocular pressure were treated with antiglaucoma medications and surgeries.Conclusion:.The reasons for elevated intraocular pressure differed between early and mid-late after pars plana vitrectomy and silicone oil injection. The elevated intraocular pressure can be controlled effectively by immediate diagnosis and proper treatment with medicine and operation.展开更多
The Sinian dolomite reservoir in Dengying Formation was developed extensively in the Sichuan Basin,and typically was the facies-controlled dolomite karstic reservoir.The development of this kind of the reservoir was r...The Sinian dolomite reservoir in Dengying Formation was developed extensively in the Sichuan Basin,and typically was the facies-controlled dolomite karstic reservoir.The development of this kind of the reservoir was related with the special deposits,diagenetic environment as well as the multi-phase and multi-type dissolution and fracturing actions.The arid-hot/dry paleo-climate was favourable to develop the large-scale microbial reef-shoal bodies and moundeshoal bodies,which was characterized by the organic framework and the sea floor hardening,thus forming primary matrix pore-type reservoir.In the background of the arid-hot/dry paleo-climate,the water-rock interaction was weak,the mineral stabilization process was slowly,and the vadose pisoliths,aragonite and high-magnesium calcite were well preserved,therefore,this diagenetic environment especially was beneficial for pore preservation.Moreover,the syngenetic and penecontemporaneous dissolution,especially three phases of weathered crust karstification due to three episodes of the Tongwan movement,led to further dissolution of spaces and form numerous non-fabric selective dissolution fractures and dissolution caves along faults and fractures.Multi-phase fractures,especially the late Yanshanian-Himalayan tectonic fractures,resulted in connection among pores,vugs and dissolution caves,and improved quality of the reservoir tremendously.展开更多
Based on the drilling,logging,seismic and outcrop data,the formation and evolution of the late Sinian to early Cambrian intraplatform basin in Sichuan Basin was studied.Through the analysis of the total residual thick...Based on the drilling,logging,seismic and outcrop data,the formation and evolution of the late Sinian to early Cambrian intraplatform basin in Sichuan Basin was studied.Through the analysis of the total residual thickness of Member 3+Member 4 of Dengying Formation,the total thickness of Maidiping Formation+Qiongzhusi Formation,and lithofacies characteristics of Maidiping Formation,the distribution of the intraplatform basin was defined and its controlling effect on natural gas distribution of Dengying Formation was revealed.The intraplatform basin was characterized by small total residual thickness of Member 3 and Member 4 of Dengying Formation,the large total thickness of Maidiping Formation and Qiongzhusi Formation,and the deep-water phosphorous-carbonaceous-siliceous mudstone in Maidiping Formation.Horizontally,the intraplatform basin was mainly distributed in Qingchuan-Ziyang-Yibin area,and experienced four evolution periods.During the period of Member 1 and Member 2 of Dengying Formation,the Sichuan Basinwas a rimmed carbonate platform with the well developed mounds and shoals on the platform margin and its interior.The intraplatform basin in western Sichuan Basin was initially formed due to the first episode of Tongwan movement.During the period of Member 3 and Member 4 of Dengying Formation,the depositional center was formed in Moxi,Changning and Zhengxiong area due to extension and rifting of the Upper Yangtze Craton,thereafter,the Sichuan Basin evolved into a rimmed carbonate platform with an intraplatform basin.The second episode of Tongwan movement between Sinian and Cambrian led to the overall uplift and exposure of Sichuan Basin characterized by weathering denudation at high position and downward fluid erosion at low position.During the period of Maidiping Formation,three lithofacies zones were developed horizontally,and the third episode of the Tongwan movement between Maidiping Formation and Qiongzhusi Formation modified the sedimentary geomorphology locally.During the period of Qiongzhusi Formation and Canglangpu Formation,continuous deposition made the Sichuan Basin evolve into a gentle siliciclastic ramp.The evolution of the intraplatform basin not only promoted formation of high-quality platform-margin dolomite reservoirs of Member 4 of Dengying Formation,but also controlled distribution of the high-quality source rocks of Maidiping Formation and Qiongzhusi Formation.The dolomite of Dengying Formation in the surrounding area of the intraplatform basin was the most favorable hydrocarbon exploration area because of its good source-reservoir configuration.展开更多
文摘Purpose:.To discuss the incidence and clinical features of early and mid-late elevated intraocular pressure after pars plana vitrectomy and silicone oil injection, and to evaluate the clinical management of eyes with secondary glaucoma.Methods:.This was an observational consecutive case series of 691 eyes in 679 patients who were treated with pars plana vitrectomy and silicone injection...The diagnostic criteria of early elevated intraocular pressure after silicone oil injection was ≥21 mmHg two weeks after surgery, while mid-late elevated intraocular pressure was ≥21 mmHg after two weeks.The incidence and clinical management of elevated intraocular pressure were analyzed.Results: In total, 211 of 691 eyes(30.54%) developed elevated intraocular pressure two weeks after pars plana vitrecto my and silicone injection. Of the 211 eyes, 101 eyes(47.87%)had ocular inflammation, 64 eyes(30.33%) showed hyphema,35 eyes(16.59%) had silicone oil in the anterior chamber, 6eyes.(2.84%).had excess silicone oil injected,.and 5 eyes(2.37%).had rubeosis irides..Eighty three of 691 eyes(12.01%).developed elevated intraocular pressure after two weeks..Of these 83 eyes, 25 eyes(30.12%) had rubeosis irides,.16 eyes(19.27%) had issues related to topic steroid therapy,.13 eyes.(15.66%).had a papillary block,.silicone oil in the anterior chamber,10 eyes(12.05%) had a silicone emulsion,.10 eyes(12.05%).had peripheral anterior synchiae,.and 9 eyes(10.84%).had silicone oil in the anterior chamber..All eyes with elevated intraocular pressure were treated with antiglaucoma medications and surgeries.Conclusion:.The reasons for elevated intraocular pressure differed between early and mid-late after pars plana vitrectomy and silicone oil injection. The elevated intraocular pressure can be controlled effectively by immediate diagnosis and proper treatment with medicine and operation.
基金This work was funded by National Science and Technology Major Project of China(No.2011ZX05004).
文摘The Sinian dolomite reservoir in Dengying Formation was developed extensively in the Sichuan Basin,and typically was the facies-controlled dolomite karstic reservoir.The development of this kind of the reservoir was related with the special deposits,diagenetic environment as well as the multi-phase and multi-type dissolution and fracturing actions.The arid-hot/dry paleo-climate was favourable to develop the large-scale microbial reef-shoal bodies and moundeshoal bodies,which was characterized by the organic framework and the sea floor hardening,thus forming primary matrix pore-type reservoir.In the background of the arid-hot/dry paleo-climate,the water-rock interaction was weak,the mineral stabilization process was slowly,and the vadose pisoliths,aragonite and high-magnesium calcite were well preserved,therefore,this diagenetic environment especially was beneficial for pore preservation.Moreover,the syngenetic and penecontemporaneous dissolution,especially three phases of weathered crust karstification due to three episodes of the Tongwan movement,led to further dissolution of spaces and form numerous non-fabric selective dissolution fractures and dissolution caves along faults and fractures.Multi-phase fractures,especially the late Yanshanian-Himalayan tectonic fractures,resulted in connection among pores,vugs and dissolution caves,and improved quality of the reservoir tremendously.
基金This work was funded by National Science and Technology Major Project of China(Grant No.2011ZX05004).
文摘Based on the drilling,logging,seismic and outcrop data,the formation and evolution of the late Sinian to early Cambrian intraplatform basin in Sichuan Basin was studied.Through the analysis of the total residual thickness of Member 3+Member 4 of Dengying Formation,the total thickness of Maidiping Formation+Qiongzhusi Formation,and lithofacies characteristics of Maidiping Formation,the distribution of the intraplatform basin was defined and its controlling effect on natural gas distribution of Dengying Formation was revealed.The intraplatform basin was characterized by small total residual thickness of Member 3 and Member 4 of Dengying Formation,the large total thickness of Maidiping Formation and Qiongzhusi Formation,and the deep-water phosphorous-carbonaceous-siliceous mudstone in Maidiping Formation.Horizontally,the intraplatform basin was mainly distributed in Qingchuan-Ziyang-Yibin area,and experienced four evolution periods.During the period of Member 1 and Member 2 of Dengying Formation,the Sichuan Basinwas a rimmed carbonate platform with the well developed mounds and shoals on the platform margin and its interior.The intraplatform basin in western Sichuan Basin was initially formed due to the first episode of Tongwan movement.During the period of Member 3 and Member 4 of Dengying Formation,the depositional center was formed in Moxi,Changning and Zhengxiong area due to extension and rifting of the Upper Yangtze Craton,thereafter,the Sichuan Basin evolved into a rimmed carbonate platform with an intraplatform basin.The second episode of Tongwan movement between Sinian and Cambrian led to the overall uplift and exposure of Sichuan Basin characterized by weathering denudation at high position and downward fluid erosion at low position.During the period of Maidiping Formation,three lithofacies zones were developed horizontally,and the third episode of the Tongwan movement between Maidiping Formation and Qiongzhusi Formation modified the sedimentary geomorphology locally.During the period of Qiongzhusi Formation and Canglangpu Formation,continuous deposition made the Sichuan Basin evolve into a gentle siliciclastic ramp.The evolution of the intraplatform basin not only promoted formation of high-quality platform-margin dolomite reservoirs of Member 4 of Dengying Formation,but also controlled distribution of the high-quality source rocks of Maidiping Formation and Qiongzhusi Formation.The dolomite of Dengying Formation in the surrounding area of the intraplatform basin was the most favorable hydrocarbon exploration area because of its good source-reservoir configuration.
