基于层区带刻度区地质特点的资源评价方法适用性分析     

张雪峰  罗安湘  惠潇  赵彦德  王克  黄锦绣 《地质科技情报》2016,(4):59-65

针对新型的层区带刻度区进行资源评价方法的适应性研究是长庆四次资评一项重要内容。采用油藏规模序列法、油藏过程模型法、容积法和饱和探井法4种资源评价方法,对具不同成藏特点的刻度区进行了深入的方法适用性分析和参数研究。研究结果表明,过程类资源评价方法对低渗透、特低渗透连续性岩性油藏,在以储量提交单元作为统计单元进行油藏发现序列与规模序列模拟时,计算参数的合理性与计算结果认知度很难达到统一。而勘探程度类资源评价方法,在深入的地质分析基础上,选择合理适宜的关键参数,是可以求得较为可信的地质资源量。当然,评价者对评价对象的认识程度和对评价方法的掌握程度也影响着资源评价的结果。  相似文献   

Triterpenols as Proxies for Tracking the Mangrove Evolution in China     

ZHANG Daolai  LIU N  YIN Ping  ZHU Zhigang  LU Jingfang  LIN Xuehui  ZHANG Yuanyuan  MENG Xianwei 《《地质学报》英文版》2016,90(5):1926-1926

正Objective Located at the interface of terrestrial and marine ecosystems,mangroves are particularly sensitive to environmental changes.They provide a sedimentary sink for organic carbon,whereby core samples could provide detailed records of mangrove evolution.Human induced,rapid environmental changes in recent years require a better understanding of the mangrove ecosystems evolution in the past,by reconstructing the past mangrove  相似文献   

降水井改造为原位生产井的工艺设计及应用     

吕士东  孙友宏  李强  郭威  周科  王思远 《世界地质》2016,35(4):1185-1194

为有效地扩大油页岩原位开采区域和节约油页岩原位开采的成本,需将废置的降水井改造成为原位生产井。根据降水井与原位生产井井身结构的相似性,对农安油页岩原位开采先导试验工程基地的降水井改造工艺进行了设计和优化。同时研发了偏心轮式套管割管装置及三爪式套管打捞装置用于拔管施工。工程实践证明,该工艺具有步骤简单、合理、高效以及价格低廉等特点。偏心轮式套管割管装置及三爪式套管打捞装置应用在降水井改造中,均取得理想的效果。  相似文献   

Using Geomechanical Method to Predict Tectonic Fractures in Low-Permeability Sandstone Reservoirs     

Feng Jianwei  Ren Qiqiang  Xu Ke 《地球科学进展》2016,31(9):946-967

Understanding and interpreting the timing, location, orientation, and intensity of natural fractures within a geological structure are commonly important to both exploration and production planning activities of low-porosity and low-permeability carbonate reservoirs. In this study, we explore the application of comprehensive geomechanical methods to quantitatively characterize the fracture parameters based on Strain Energy Density Theory, such as linear fracture density and volume fracture density. This study approach is based on the idea that energy generated by tectonic stress on brittle sandstone,which can be distinguished fracture surface energy, friction energy dissipation and residual strain energy and natural fractures can be interpreted or inferred from geomechanical-model-derived strains. For this analysis, we model an extension and compression compound fault block developed in a mechanically stratified sandstone and shale sequence because mechanics experimental data and drilling data exist that can be directly compared with model results.However, the results show that the approach and our study conclusion are independent of the specified structural geometry, which can correlate fracture parameters in different stages with different tectonic activities, and finally build and visualize fracture networks in sandstone. The presence or absence of filling minerals in fractures is shown to strongly control the destruction and transformation of low-permeability sandstone, and this control possesses crucial implications for interpreting fracture aperture and reservoir flow simulation.  相似文献   

高压下天然菱铁矿的压缩性和电子结构研究     

高静  巫翔  秦善  张硕  杨科  李晓东 《岩石矿物学杂志》2016,35(2):276-282

采用同步辐射光源和金刚石对顶砧(DAC)技术,对天然菱铁矿的压缩性和电子结构进行了原位X射线衍射(XRD)和X射线吸收近边结构谱(XANES)测试研究。在室温下随着压力逐渐升高至50.2 GPa,菱铁矿保持方解石型结构不变,但是逐渐向Na Cl型结构转变;刚性[CO3]2-基团平行于ab-平面定向排列使c轴的压缩性大于a轴。菱铁矿在44.6~47.1 GPa之间发生电子由高自旋态(HS)向低自旋态(LS)的转变,表现为体积塌陷8%。HS菱铁矿的等温状态方程参数为K0=112(5)GPa和K'0=4.6(3)。首次采用XANES技术对菱铁矿中Fe2+的电子结构进行了研究,结果表明:随着压力升高至37.3 GPa,Fe2+的配位和局域对称并未发生明显变化;此后电子结构开始转变,Fe2+的3d轨道分裂能降低,电子跃迁概率增大,呈现LS特性。  相似文献   

吉尔吉斯斯坦中天山地质特征及研究进展   总被引：2，自引：1，他引：1       下载免费PDF全文

陈博  马中平  孟广路  王斌  曹积飞  李文渊 《中国地质》2016,(2):458-469

文章通过对近年来有关吉尔吉斯中天山研究进展的梳理,结合在吉尔吉斯斯坦的实地考察,系统论述了中天山基础地质情况,并简述与岩浆活动有关的成矿作用。吉尔吉斯斯坦境内的天山由"尼古拉耶夫线"和阿特巴什—伊内尔切克断裂划分为北、中、南3部分。中天山两侧的缝合带限定了早古生代古吉尔吉斯洋和晚古生代南天山洋的发展和消亡过程。组成中天山的不同块体大多具有古元古界的基底,古生代总体处于大陆坡-边缘海沉积环境。晚古生代产出与俯冲相关的岩浆作用和后碰撞岩浆作用,前者与斑岩型铜矿、接触交代型铜-金矿相关,后者与造山型金矿相关。  相似文献   

仿生高效切削齿试验研究          下载免费PDF全文

高科  唐琼琼  孙阳  谢晓波 《探矿工程》2016,43(8):69-71

在仿生高效耐磨理论的指导下,以鼹鼠爪趾为仿生原型,引入了其经长期进化而具有的高效、耐磨的特性。选用CVD多晶金刚石为切削齿的切削单元,采用真空热压烧结工艺制备仿生高效切削齿,并将其与常规PDC齿、仿生PDC齿的耐磨性和切削效率进行对比试验,结果显示：仿生高效切削齿的耐磨性较常规PDC齿提高23%;切削效率较常规PDC齿提高1.49倍,较仿生PDC齿提高48%。初步证明了仿生高效切削齿工艺的可行性,为下一步高效切削钻头的研究奠定了坚实的基础。  相似文献   

养殖曼氏无针乌贼(Sepiella japonica)的两性异形及判别模式的建立     

史会来  平洪领  张涛  吕振明  孟浩  余方平 《海洋与湖沼》2016,47(4):838-846

两性个体的有效鉴别是曼氏无针乌贼高效繁育及养殖模式(如单性养殖)建立的基础。为研究曼氏无针乌贼主要形态指标及雌雄形态差异,测量了160只F1代曼氏无针乌贼的19项可测量性状及13项标准化性状。采用聚类分析、主成分分析和判别分析方法研究了曼氏无针乌贼同生群两性间的形态差异。结果表明:两性间可测量性状和标准化性状各有10项有显著性差异(P0.05);对标准化性状经过主成分分析和R-聚类分析均显示曼氏无针乌贼的两性的差异主要集中在辅助交配器官特征,头部特征,捕食器官和肥瘦特征以及体型特征等4个方面。在此基础上,通过逐步判别法从标准化性状中筛选出3项,即左3腕长/胴长、左4腕长/胴长及左触腕长/胴长,建立了雌雄的判别方程:雄性:F1=223.42X3+165.85X4+7.951X5–108.06;雌性:F2=151.48X3+92.71X4+19.19X5–60.38。所建立的判别方程,对样本群体的综合判别率达到95.00%。利用F2代亲体测量数据对判别函数进行识别验证,综合判别率达到85.34%。在判别方程中的3个标准化性状中,左3腕长/胴长和左4腕长/胴长在两性亲体间均存在显著的差异(P0.05),表明曼氏无针乌贼的雄性在性选择的作用下,交配器官存在显著差异。  相似文献   

A synthetic aperture radar sea surface distribution estimation by n-order Bézier curve and its application in ship detection   总被引：1，自引：0，他引：1  

郎海涛  张杰  王一多  张晰  孟俊敏 《海洋学报(英文版)》2016,35(9):117-125

To dates,most ship detection approaches for single-pol synthetic aperture radar(SAR) imagery try to ensure a constant false-alarm rate(CFAR).A high performance ship detector relies on two key components:an accurate estimation to a sea surface distribution and a fine designed CFAR algorithm.First,a novel nonparametric sea surface distribution estimation method is developed based on n-order Bézier curve.To estimate the sea surface distribution using n-order Bézier curve,an explicit analytical solution is derived based on a least square optimization,and the optimal selection also is presented to two essential parameters,the order n of Bézier curve and the number m of sample points.Next,to validate the ship detection performance of the estimated sea surface distribution,the estimated sea surface distribution by n-order Bézier curve is combined with a cell averaging CFAR(CA-CFAR).To eliminate the possible interfering ship targets in background window,an improved automatic censoring method is applied.Comprehensive experiments prove that in terms of sea surface estimation performance,the proposed method is as good as a traditional nonparametric Parzen window kernel method,and in most cases,outperforms two widely used parametric methods,K and G0 models.In terms of computation speed,a major advantage of the proposed estimation method is the time consuming only depended on the number m of sample points while independent of imagery size,which makes it can achieve a significant speed improvement to the Parzen window kernel method,and in some cases,it is even faster than two parametric methods.In terms of ship detection performance,the experiments show that the ship detector which constructed by the proposed sea surface distribution model and the given CA-CFAR algorithm has wide adaptability to different SAR sensors,resolutions and sea surface homogeneities and obtains a leading performance on the test dataset.  相似文献   

海洋产业结构与海域承载力的匹配关系探讨——以辽宁省为例          下载免费PDF全文

狄乾斌  王萌  孟雪 《海洋开发与管理》2016,33(4):14-18

海洋产业结构和海域承载力之间存在多种耦合匹配关系,其匹配程度是影响海洋经济健康持续发展的重要因素,而准确地定量化评价这种匹配关系是准确把握海洋产业结构是否失衡的关键环节。文章将海域承载力引入海洋产业结构问题研究中,首先对海洋产业结构水平和海域承载力定量化测算,在此基础上运用基于数列的匹配度计算方法测度辽宁省海域承载状况与海洋产业结构水平的匹配度,探讨海洋产业结构与海域承载力之间的匹配关系。结果表明:辽宁省海域承载力与海洋产业结构水平匹配度数值较高,二者之间存在较匹配的关系。  相似文献