GEOPHYSICAL EXPLORATION     

《Abstract of Chinese Geological Literature》2014,(2)

正20141074Bao Xijie(Research Institute of Exploration and Development,Daqing Oilfield Company,PetroChina,Daqing 163712,China)Gather Optimal Processing and Application Effect of Prestack AVA Instantaneous Inversion  相似文献   

辽河油田东部凹陷玄武岩测井特征分析     

左程吉  陆哲昆  王宏伟  王祝文 《世界地质》2016,35(4):1095-1100

针对辽河油田东部凹陷地区复杂火成岩岩性中玄武岩的测井特征,根据东部凹陷的测井数据及取芯段的薄片识别,共找到4种不同类型的玄武岩地层,分两组进行对比分析。第一组:气孔玄武岩、角砾化玄武岩;第二组:玄武岩、含油水层的玄武岩。利用玄武岩地层对应数据制作测井响应统计表,对比不同类型测井参数的差别制作交会图,得到角砾化玄武岩相对气孔玄武岩有较高的自然电位值,含油水层的玄武岩相对玄武岩有较高自然伽马值及中子值等特征。分析原因为气孔玄武岩及角砾化玄武岩孔隙裂缝发育,密度较低,黏土矿物充填角砾化玄武岩孔隙使自然电位值相对较高;含油水层的玄武岩中大量氢元素使中子值及自然伽马值相对玄武岩有所增加。  相似文献   

松辽盆地白垩系浅水湖泊三角洲沉积微相研究——以大庆杏树岗油田杏三区东部葡Ⅰ1-3小层为例   总被引：1，自引：1，他引：0       下载免费PDF全文

冯旭东  张东  林春明  张霞  刘威  于进  李葳 《沉积与特提斯地质》2016,36(2):1-10

根据密井网测井、录井以及其它分析化验资料,结合区域地质背景,对松辽盆地杏树岗油田杏三区东部白垩系姚家组一段葡萄花Ⅰ组油层1-3小层(葡Ⅰ1-3小层)沉积微相类型、特征、组合模式和不同地质时期沉积微相平面展布特征及其演化规律进行系统的研究。结果表明,葡Ⅰ1-3小层为浅水湖泊三角洲沉积,主要发育三角洲分流平原和三角洲内前缘2种沉积亚相,含11种沉积微相,具有不同的沉积特征和测井相模式;利用自然电位曲线幅变值和砂体厚度,有效识别天然堤、水上决口沉积、溢岸薄层砂3种有成因联系、测井曲线形态类似的沉积微相;进一步根据各沉积微相的测井曲线形态组合、沉积成因及沉积作用的不同,总结出7种沉积微相组合模式。葡Ⅰ1-3小层沉积演化经历了早期湖退、中期稳定、晚期湖侵3个阶段,不同时期的沉积特征、沉积微相展布各异,总体表现出湖盆发育规模由大变小,再变大,骨架砂体厚度和理想钻遇率逐渐减小的特点。  相似文献   

新疆春风油田石炭系火山岩岩性特征及测井识别方法          下载免费PDF全文

黄习习  金强  明玉坤  王伟  程付启 《沉积与特提斯地质》2016,36(4):37-43

不同岩性的火山岩其储集性能差异甚远,准确识别火山岩岩性对于火山岩储层的研究具有重要意义。研究区春风油田石炭系储层以火山岩为主,过渡类型较多,岩性较为复杂。利用岩心观察、薄片鉴定、地化分析等方法确定研究区发育火山熔岩类和火山碎屑岩类两类火山岩,其中,火山熔岩包括玄武岩、安山玄武岩、玄武安山岩以及安山岩,火山碎屑岩有凝灰岩和火山角砾岩等。通过识别出的岩性标定测井,分析每种岩性的测井响应特征,利用交会图法和星形图法,建立了不同岩性的识别标准。  相似文献   

鄂尔多斯盆地杭锦旗探区二叠系下石盒子组盒1段致密砂岩气层测井评价方法          下载免费PDF全文

张渝悦  张威 《沉积与特提斯地质》2016,36(4):53-59

通过储层"四性"关系研究,分析了鄂尔多斯盆地北部杭锦旗探区致密砂岩储层岩性对物性的控制作用及测井曲线对储层岩性、物性和含气性的响应特征。认为二叠系下石盒子组盒1段砂岩石英含量、粒度和孔隙结构是影响物性和含气性的主要因素,储层"四性"关系具有砂岩粒度与石英含量控制物性、物性控制含气性的基本特点。利用交汇图版法与双孔隙度曲线叠合法对研究区二叠系下石盒子组盒1段气层进行了综合识别。根据储层的岩性、物性、孔隙结构等参数,结合单井测试产能特征,将杭锦旗探区二叠系下石盒子组盒1段气层划分为3类进行综合评价,气层以Ⅱ类为主,其次为Ⅰ类。  相似文献   

Interaction of cnoidal waves with an array of vertical concentric porous cylinders     

《Applied Ocean Research》2016

An array of large concentric porous cylinder arrays is mounted in shallow water exposed to cnoidal waves. The interactions between waves and cylinders are studied theoretically using an eigenfunction expansion approach. Semi-analytical solutions of hydrodynamic loads and wave run-up on each cylinder are obtained using first approximation to cnoidal waves. The square array configuration of four-legged identical concentric porous cylinder is investigated in present study. Numerical results reveal the variation of dimensionless wave force and wave run-up on individual cylinder with angle of incidence, porosity parameter, spacing between outer and inner cylinders, spacing between concentric porous cylinders and wave parameter. Different mechanism of wave force is found under different range of scattering parameter.  相似文献   

柴达木盆地北缘柴页1井中侏罗统大煤沟组页岩储层测井评价     

王胜建  包书景  梅建森  梅岩辉  潘洪峰  汪大明 《地质通报》2016,35(203):260-272

页岩储层测井评价是后期压裂改造工程的基础,通过分析柴页1井常规测井曲线特征,结合特殊测井和岩心样品分析化验数据,综合评价了中侏罗统大煤沟组页岩岩性、物性、地球化学、含气性、可压裂性等特征,获得了储层评价及工程改造参数。柴页1井中侏罗统大煤沟组至少发育128.1m厚的富有机质页岩,具有高伽马、高声波时差、高中子、高电阻、低密度的特点;测井计算有利的富有机质页岩的总有机碳含量介于3.20%~4.20%之间,总含气量介于1.50~4.50m3/t之间,有利页岩层段脆性矿物含量介于45%~75％之间,划分出3个有利层组,第Ⅰ层组和第Ⅱ层组具有杨氏模量高、泊松比低的特点,有利于后期射孔压裂。  相似文献   

Influence of prey abundance and abiotic factors on the long-term home-range and movement dynamics of spotted grunter Pomadasys commersonnii in an intermittently open estuary     

BA Maree  PD Cowley  TF Næsje  A-R Childs  AI Terörde  EB Thorstad 《African Journal of Marine Science》2016,38(2):171-180

Long-term home-range and movement dynamics of spotted grunter Pomadasys commersonnii and the distribution of their dominant prey, the sandprawn Callichirus kraussi, were investigated in the intermittently open East Kleinemonde Estuary, South Africa. In addition, the effects of fish length, diel cycle, season and other abiotic factors on home range and area use were examined. Nine adult spotted grunter (326–489?mm total length) were tagged with acoustic transmitters, and their movements were studied by manual tracking on six consecutive days and nights during each of five tracking sessions from March to November 2004. In addition, movement patterns were recorded by stationary data-logging receivers. Kernel home ranges (95% utilised distribution) varied in size (mean: 76 797?m²?, range: 26 296–165 321?m²), but were all located in the lower one-third of the 3.6 km-long estuary. There was no effect of season, the diel cycle or fish length on the home-range estimates. However, the distribution of prey corresponded with the home-range distribution of tagged fish. Although sandprawn distribution was highly variable within and among transects and depth classes, sandprawns were most abundant in the lower region of the estuary, which corresponded to the home-range distribution of spotted grunter. Spatial distribution of prey appears to be a dominant factor influencing home-range parameters of this species within an intermittently open estuary.  相似文献   

广西近海灾害地质因素及声学反射特征          下载免费PDF全文

李海东  许江  郑江龙  胡毅  张汉女  钟贵才 《应用海洋学学报》2016,35(2):275-283

利用高分辨率地球物理资料及相关历史资料,对北部湾北部的广西近海灾害地质因素进行了地质地球物理解译,识别出海底沙波、海底沙脊、塌陷洼地、冲刷沟槽、浅层气、残积砂体、地层间断、埋藏丘、埋藏古河道等多种灾害地质因素.根据它们出现的频率、规模及声学特征可知:浅层气和埋藏古河道是广西近海最为发育的灾害地质因素,其对海洋工程的施工与建设有较大的危害性.  相似文献   

TTI介质拟声波方程数值模拟     

黄杰  杨国权  李振春  谷丙洛 《物探与化探》2018,(1):134-143

TTI介质qP波数值模拟方法因为考虑了倾角因素,可以比VTI介质qP波数值模拟方法更加准确地描述各向异性介质中地震波场的传播规律。文中用拟声波方程对TTI介质中的地震波场进行了高阶有限差分数值模拟,在改进衰减函数分布方式后,通过坐标变换,利用改进的完全匹配层(perfectly matched layer,PML)边界控制方程对波场边界进行吸收处理,取得了良好的效果;然后分析了拟声波方程数值模拟中的稳定性问题,并对波场中的伪横波进行压制。通过对不同模型的数值模拟,验证了文中使用的TTI介质拟声波波动方程的稳定性以及所采用的PML边界控制方程的可靠性和适用性。  相似文献