Estimation of 2-D and 3-D Fracture Densities from 1-D Data - Experimental and Field Results     

RobertD.JACOBI 《《地质学报》英文版》2003,77(4):491-503

2-D and 3-D densities of fractures are commonly used in mining safety design, natural gas and oil production in fractured reservoirs, and the characterization of subsurface flow and transportation systems in fractured rocks. However, many field data sets are collected in 1-D frequency (f) (e.g., scanlines and borehole data). We have developed an ARC/ INFO-based technology to calculate fracture frequency and densities for a given fracture network. A series of numerical simulations are performed in order to determine the optimal orientation of a scanline, along which the maximum fracture frequency of a fracture network can be obtained. We calculated the frequency (f) and densities (both D1 and D2) of 36 natural fracture trace maps, and investigated the statistical relationship between fracture frequency and fracture density D1, i.e. D1=1.340f+ 0.034. We derived analytical solutions for converting dimensional density (D1) to non-dimensional densities (D2 and D3) assuming that fracture length distribution f  相似文献   

俄罗斯天然气水合物研究现状     

张春晖 《地质与资源》2003,12(3):192-192

2003年1月27～29日在俄罗斯新西伯利亚市召开了“俄罗斯2003地球生态体系中的天然气水合物”会议.会议的组织者为俄罗斯科学院西伯利亚分院、A·B·尼古拉耶夫无机化学研究所、A·A·特罗菲姆克地质与地球物理矿物学综合研究所和俄罗斯基础研究基金会.到会代表100余人,分别来自莫斯科、圣彼得堡、新西伯利亚、海参崴等15个城市的40多家单位. 目前,世界上许多国家对天然气水合物的研究兴趣不断提高.与煤层气、无机成因气、深盆气等非常规油气资源一样,天然气(以甲烷为主)水合物亦为重要的潜在新能源,值得今后进行深入勘查、利用开发…  相似文献   

Molecular Geochemical Evidence for the Origin of Natural Gas from Dissolved Hydrocarbon in Ordovician Formation Waters in Central Ordos Basin   总被引：1，自引：0，他引：1  

李贤庆  侯读杰  唐友军  胡国艺  熊波 《中国地球化学学报》2003,22(3):193-202

1IntroductionTheOrdosBasinisthesecondlargestoilandgas bearingbasininChina .ItislocatedinthePaleo zoicplatformandbelongstoacratonbasin ,whichisincongruencewiththePaleozoicdepressionattheedgesoftheplatformandtheMesozoic Cenozoicdepressionwithintheplatform .SincethediscoveryofnaturalgasesinWellShancan 1andWellYu 3in 1989,theassessmentandexplorationofOrdovicianweatheringcrustnaturalgasesintheOrdosBasinhaveattractedextensiveatten tion (YangJunjieetal.,1996 ;DaiJinxingetal.,1997) .Thecentral…  相似文献   

天然气水合物钻探钻井液低温特性的研究     

孙涛  陈礼仪  朱宗培 《探矿工程》2003,30(3):35-37

天然气水合物是一种赋存于低温条件和较高压力的新型清洁能源，勘探开发中必须保持天然气水合物的稳定才能钻取实物岩心。从维持天然气水合物相态平衡着手，介绍了国外用于抑制天然气水合物相态平衡的低温钻井液体系，分析了低温环境下钻井液流变特性和密度特性，提出了天然气水合物钻探钻井液体系研究的建议。  相似文献   

石膏可能成为可燃冰勘探新标志     

《探矿工程》2003,(3):63-63

  相似文献   

南海北部陆坡海底异常地貌特征与天然气水合物的关系   总被引：6，自引：0，他引：6  

沙志彬  杨木壮梁劲郭依群  梁金强 《南海地质研究》2003,(14):29-34

在南海北部陆坡的浅层剖面上，发现存在若干海底声学异常反射现象，主要有滑塌体、丘状体、麻坑、羽状流(海水中)等类型，它们是由于滑塌、浅层气或流体溢出等因素造成的海底微地形地貌突变，可能与海底下存在的天然气水合物有关。  相似文献   

油藏地球化学研究的理论基础与发展趋势   总被引：1，自引：0，他引：1  

王敏芳 《地质地球化学》2003,31(3):47-52

油藏地球化学是一个新兴的地球化学分支学科，是传统的有机和无机地球化学与油藏工程紧密结合的产物。其产生对油气勘探和开发起着重要的作用。本文从油藏非均质性、充注史和流体一岩石相互作用三个方面论述了油藏地球化学研究的理论基础，并简要总结了油藏地球化学近年来的长足发展以及产生的一些新兴研究内容。  相似文献   

鄂尔多斯盆地天然气地质特征     

钟幔 《海相油气地质》2003,8(2):102-102

鄂尔多斯盆地油气资源丰富，勘探领域广阔，油气分布格局具有”南油北气、浅油深气、中油古气”等特点。即盆地南半部是主油区，北半部是主气区，盆地浅部发育含油带，深部发育含气带，盆地中生界主产油，古生界主产气。该盆地是我国实现油气协调发展的理想地区。在鄂尔多斯盆地进行油气勘探，建立正确的地质思路，并根据其地质特点制订油气勘探方针、把握油气勘探方向至关重要。  相似文献   

塔里木盆地天然气成藏特征及勘探前景     

王清华 《海相油气地质》2003,8(3):21-30

塔里木盆地存在库车一塔北、塔东以及巴楚一塔西南三大天然气富集区。前陆区和台盆区典型大中型气藏的成藏模式有三种；超高压强充注煤成气成藏模式、早油晓气常压煤成气成藏模式、海相油裂解气晚期成藏模式。以实例阐述了这三种模式的战藏特征。目前所发现的天然气田(藏)总体上主要受有效气源灶、优质区域盖层、局部构造样式、断裂带的分布、后期构造活动的强烈程度等多重因素控制；气源灶特征决定了塔里木盆地全盆富气。盆地天然气资源极其丰富，目前地质储量的探明率仅占9％。  相似文献   

Effects of Biodegradation on the Distribution of Alkylcarbazoles in Crude Oils     

张春明  梅博文  STEVE R.LARTER  MARTIN P.KOOPMANS  肖乾华 《中国地球化学学报》2002,21(2):140-146

We have investigated the distributions of alkylcarbazoles in a series of crude oils with different biodegradation extents, in combination with biomarker parameters, stable carbon isotopic ratios and viscosities. The analyses showed that slight biodegradation has little effect on alkylcarbazoles. The concentrations of C₀-, C₁-, and C₂-carbazoles seem to display a slight decrease with biodegradation through the moderately biodegraded stage, and an abrupt decrease to the heavily biodegraded stage. The relative concentrations of C₀-, C₁-, and C₂-carbazoles do not show any apparent change in the non-heavily biodegraded stages, but through non-heavily biodegraded to heavily biodegraded stages, the percentages of C₀- and C₁-carbazoles decrease, and those of C₂-carbazoles increase significantly, which may indicate that C₂-carbazoles are more resistant to biodegradation than lower homologous species. As to C₂-carbazole isomers, the relative concentrations of the pyrrolic N-H-shielded, pyrrolic N−H partially shielded and pyrrolic N-H-exposed isomers do not show any obvious variation in the non-heavily biodegraded oil, but there is an abrupt change through the mid-biodegraded stage to the heavily biodegraded stage. This project was financially supported by the Youth Knowledge-Innovation Foundation of CNPC (No. 00Z1304).  相似文献