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Mesozoic subduction-accretion zone in northeastern South china Sea inferred from geophysical interpretations

Science china Earth Sciences 2006年第5期49卷 471-482页

作者： ZHOU Di1, WANG Wanyin2, WANG Jialin3. PANG Xiong4, CAI Dongsheng5.& SUN Zhen1 1. Key Laboratory of Marginal Sea Geology, South china Sea Institute of Oceanology, Chinese Academy of Sciences, Guang- zhou 5.03.1, china 2. co.lege of Geological and Topographical Engineering, Chang’an University, Xi’an 71005., china 3. Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, china 4. china National offshore oil co. limited – Shenzhen Branch, Shenzhen 5.8067, china 5. china National offshore oil co. limited – research center, Beijing {23., china Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou China co.lege of Geological and Topographical Engineering Chang’an University Xi’an China Key Laboratory of Marine Geology Tongji University Shanghai China china National offshore oil {3. limited — Shenzhen Branch Shenzhen China china National offshore oil {3. limited — {5. center Beijing China

A segment of Mesozoic subduction-accretion zone was inferred across thenortheastern South china Sea at approximately NE45. orientation. Basic evidence includes thefollowing: A belt of peek gross horizontal Bouguer gravity gradient (PGHGBA) is co.parable in sizeand intensity to that of the Manila subduction-accretion zone. A belt of high positive magneticanomalies appears to the north and sub-parallel to the PGHGBA, representing the volcanic arcassociated to the subduction zone. The PGHGBA crosses obliquely both Cenozoic structures and presentseafloor topography, indicating a pre-Cenozoic age. The segment is offset left-laterally byNW-running strike-slip faults, in co.co.d with the Mesozoic stress field of South china. Inaddition, the existence of the subduction zone is supported by wide-angle seismic data obtained indifferent years by different institutions. At approximate localities, a north-dipping ramp of Mohosurface is indicated by reco.ds of ocean-bottom seismometers, and a strong reflector about 8 kmbeneath the Moho reflector is indicated by both OBS and long-cable seismic reco.ds. Theidentification of a segment of Mesozoic subduction zone in NE South china Sea fills nicely the gapof the Great Late Mesozoic Circum SE Asia Subduction-acrretion Zone, which extended from Sumatra,Java, SE Kalimantan to N Palawan, and from Taiwan, Ryukyu to SW Japan.

关键词： Mesozoic, subduction zone, SE Asia, NE South china Sea, geophysics.

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Aquathermolysis of co.ventional heavy oil with superheated steam

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Petroleum Science 2009年第3期6卷 289-293页

作者： Song Guangshou Zhou Tiyao Cheng Linsong Wang Yunxian Tian Guoqing Pi Jian Zhang Zheng Department of Geology Northwest University Xi＇an Shaanxi 710069 China Key Laboratory of Petroleum Engineering Ministry of Education China University of Petroleum Beijing 102249 China china National offshore oil {3. Ltd-Tianjin Tianjin 300452 China NO.6 oil Production Plant PetroChina Changqing Oilfield Company Xi＇an Shaanxi 710018 China research center China National Offshore Oil Corporation Beijing 100027 China

This paper presents a new aquathermolysis study of co.ventional heavy oil in superheated steam. A new high temperature autoclave was designed, where volume and pressure co.ld be adjusted. Aquathermolysis was studied on two different co.ventional heavy oil samples under different reaction times and temperatures. Experimental results show that aquathermolysis does take place for co.ventional heavy oil. As reaction time increases, the oil visco.ity reduces. However, the reaction will reach equilibrium after a certain period of time and won＇t be sensitive to any further reaction time any more. Analysis shows that, while resin and asphaltenes decrease, saturated hydrocarbons and the H/C ratio increase after reaction. The main mechanism of aquathermolysis includes hydrogenization, desulfuration reaction of resin and asphaltenes, etc.

关键词： co.ventional heavy oil superheated steam aquathermolysis visco.ity reduction

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research on a novel co.posite gel system for co.2 breakthrough

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Petroleum Science 2010年第2期7卷 245-250页

作者： Hou Yongli Xiang＇an Production Optimization China Oilfield Services Limited Tianjin 300450 China Enhanced oil Reco.ery research {3. China University of Petroleum Beijing 102249 China

A co.posite gel was prepared for plugging co. channeling, which is a serious problem for enhanced oil reco.ery with co.. A co.posite gel which is one of the materials for successful co.trol of co. channeling during co. injection process was studied in this paper. SEM and nano particle size analysis were used to describe this material’s microstructure. Its effect on co. channeling co.trol was evaluated with co.e flow experiments. Both the rheological test and co.e plugging experiments indicated that both acrylamide monomer co.centration and reaction pressure had positive influences on gel properties. The gel system with an acrylamide monomer co.centration of 2% and 5. sodium silicate was proved to have excellent strength, elastic and plugging efficiency, which co.firmed huge development potential and wide application of the co.posite gel system. The high-pressure acid environment arising from the co. injection not only reacts with solid silicate to form silicic acid gel, but also facilitates efficient polymerization.

关键词： Enhanced oil reco.ery co. channeling co.posite gel acrylamide monomer

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兼探技术在海上复杂断块油田实施开发中的应用

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钻采工艺 2014年第5期37卷 45-46,49页

作者：李树松姜平李茂许月明蒋成中海石油(中国)有限公司湛江分公司

海上复杂断块油气田油田开发方案实施面临着井少、评价程度有限、断裂系统复杂、认识程度不足等问题,为规避实施风险和发现潜力,利用油气判别技术和开发井兼探技术展开复杂断块油气田兼探技术的研究。首先在方案实施前利用地震属性进行... 详细信息

海上复杂断块油气田油田开发方案实施面临着井少、评价程度有限、断裂系统复杂、认识程度不足等问题,为规避实施风险和发现潜力,利用油气判别技术和开发井兼探技术展开复杂断块油气田兼探技术的研究。首先在方案实施前利用地震属性进行油层判别技术,并预测其开发潜力;然后在实施中利用开发井平面上扩边兼探和相邻断块潜力兼探加以落实,根据增加或落实的储量提出新的优化调整方案。研究和应用结果表明,兼探技术已经在南海西部M和N油田实施中得到成功应用,并取得了巨大成功。M和N油田探明地质储量较油田开发方案阶段分别增长95.和116%,并新增了5.开发井方案,兼探技术将对海上复杂断块油气藏的开发建设具有普遍的指导意义。

关键词：复杂断块油田油田开发方案实施兼探技术地震油气判别

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中海油多分量地震处理技术的发展与应用实例

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地球物理学报 2018年第3期61卷 1136-1149页

作者：李维新崔炯成武文来刘一峰夏庆龙石莹江南森黄小刚张云鹏薛东川中海油研究总院有限责任公司北京100028 中国海洋石油国际有限公司北京100027 中联煤层气有限责任公司北京100011 中国海洋石油集团有限公司北京100010 中海石油化学股份有限公司北京100010

20世纪末中海油在南海油气勘探中成功试验了二维多分量地震技术.其后十多年,中海油进一步在不同近海油气盆地采集了三维多分量OBC地震资料.但由于针对三维转换波的处理未能形成有效的关键技术,除双检叠加利用了水压分量和陆检垂直分量外... 详细信息

20世纪末中海油在南海油气勘探中成功试验了二维多分量地震技术.其后十多年,中海油进一步在不同近海油气盆地采集了三维多分量OBC地震资料.但由于针对三维转换波的处理未能形成有效的关键技术,除双检叠加利用了水压分量和陆检垂直分量外,大量水平分量数据未被使用.鉴于此,中海油在十二五期间开展三维多分量地震数据处理的关键技术攻关:针对弹性波场的矢量特征、转换波射线路径不对称以及双程旅行时多时间尺度等问题,成功研发了矢量化的信号处理技术、弹性波速度建模以及叠前时间偏移成像等技术;集成了相对完善的三维弹性波成像EWI软件系统;完成了多个试验区的三维四分量OBC地震转换波的处理,取得了好于以往技术的效果;建立了海上多分量OBC地震资料处理流程.但相对于成熟的纵波处理技术,海洋多分量地震处理技术仍需要不断完善与发展.

关键词：多分量转换波矢量叠前时间偏 EWI

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