Geological roles of the siltstones in tight oil play     

《Marine and Petroleum Geology》2017

Understanding the hydrocarbon accumulation pattern in unconventional tight reservoirs is crucial for hydrocarbon evaluation and oil/gas extraction from such reservoirs. Previous studies on tight oil accumulation are mostly concerned with self-generation or from source to reservoir rock over short distances. However, the Lucaogou tight oil in Jimusar Sag of Junggar Basin shows transitional feature in between. The Lucaogou Formation comprises fine-grain sedimentary rocks characterized by thin laminations and frequently alternating beds. The Lucaogou tight silt/fine sandstones are poorly sorted. Dissolved pores are the primary pore spaces, with average porosity of 9.20%. Although the TOC of most silt/fine sandstones after Soxhlet extraction is lower than that before extraction, they show that the Lucaogou siltstones in the area of study have fair to good hydrocarbon generation potential (average TOC of 1.19%, average S₂ of 4.33 mg/g), while fine sandstones are relatively weak in terms of hydrocarbon generation (average TOC of 0.4%, average S₂ of 0.78 mg/g). The hydrocarbon generation amount of siltstones, which was calculated according to basin modeling transformation ratio combined with original TOC based on source rock parameters, occupies 16%–72% of oil retention amount. Although siltstones cannot produce the entire oil reserve, they certainly provide part of them. Grain size is negatively correlated with organic matter content in the Lucaogou silt/fine sandstones. Fine grain sediments are characterized by lower deposition rate, stronger adsorption capacity and oxidation resistance, which are favorable for formation of high quality source rocks. Low energy depositional environment is the primary reason for the formation of siltstones containing organic matter. Positive correlation between organic matter content and clay content in Lucaogou siltstones supports this view point. Lucaogou siltstones appear to be effective reservoir rocks due to there relatively high porosity, and also act as source rocks due to the fair to good hydrocarbon generation capability.  相似文献   

东北地区玉米低温冷害气候和经济损失风险分区   总被引：23，自引：3，他引：20  

马树庆  王琪  王春乙  霍治国 《地理研究》2008,27(5):1169-1177

分析了东北地区玉米低温冷害发生的热量条件、发生频率、风险指数和风险概率,用冷害气候风险评价指标将东北地区划分成高、偏高、中等、较低和低风险5个玉米低温冷害气候风险区域。考虑到冷害气候风险和玉米产量和面积比例等农业生产结构因素,建立了玉米低温冷害的气候—灾损综合风险评估模式,并将东北地区划分成高风险、较高风险、中风险、较低风险和低风险5个玉米低温冷害灾损综合风险区域,并指出各区域减缓玉米冷害风险的技术和战略措施。结果表明,东北地区的北部、东部和中部低温冷害灾损风险较大,吉林省西南部和辽宁省大部风险较小。  相似文献   

松辽盆地南部深层火山岩、火山机构和火山岩相地质-地震综合识别   总被引：11，自引：0，他引：11  

杨立英  李瑞磊 《吉林大学学报(地球科学版)》2007,37(6):1083-1090

松辽盆地南部深层发育2套火山岩,分布在下白垩统营城组下部和上侏罗统火石岭组中上部。东岭地区营城组为酸性岩,岩相以爆发相为主,占73%;火石岭组为中基性岩,可分为上下两段,岩相以喷溢相为主(上段占67%,下段占59%)。酸性岩在地震剖面上主要表现为透镜状、丘状反射特征,顶面为中强反射,内部为中强或弱反射,低频、杂乱、断续分布,具有明显的穿时现象。中基性岩在地震剖面表现为眼球状、丘状反射特征,顶部为强反射,与围岩呈超覆关系,内部为弱反射、蠕虫状、杂乱、低频、断续反射。利用拟声波曲线反演方法识别火山岩,其结果表明东岭地区火石岭组火山岩厚度受断层F₁控制,在F₁东侧薄,西侧厚,在SN109井区域最厚。利用构造趋势面分析和三维体切片技术可识别火山机构的火山锥。在东岭地区火石岭组发现2个火山锥发育区(以中部区域为主),该区火山锥面积为56 km²,最大幅度为547 m。利用倾角属性方法结合火山机构物理模型可识别出火山通道相和侵出相,波形分类方法可识别爆发相和喷溢相,结合两种方法可以准确地识别出火山岩相;其结果表明东岭地区火石岭组在中部区域喷溢相上部亚相和火山通道相发育。火山锥发育的区域是火山岩储层厚度发育的区域,同时岩相预测结果表明该区也是储层物性好的区域,所以东岭地区中部火山岩是勘探的有利目标区。  相似文献   

MAPGIS 6.O平台地学断面图形数据库向ARC/INFO 8.1平台的转换   总被引：1，自引：0，他引：1  

杨菲  刘国兴  方彦春 《世界地质》2004,23(2):183-186

对MAPGIS地学断面数据文件转换成ARC/INFO的数据文件的几种途径进行了探讨,指出了在转换大数据量过程中存在的问题和局限性,并在大量转换实验基础上,得出最优的解决方案.在数据转换时,点文件在MAPGIS平台下转换成E00格式,通过在ARC/INFO的ArcToolbox中选择工具将Interchange格式转换成Coverage格式;线和区文件在MAPGIS平台上转换为MIF文件,在ARC/INFO的ArcToolbox中选择工具将MIF格式转换成Shapefile格式.  相似文献   

LAND　RESOURCES　SURVEY　BY　REMOTE　SENSING　AND　ANALYSIS　OF　LAND　CARRYING　CAPACITY　FOR　POPULATION　IN　TUMEN　RIVER　REGION     

Zhang Yangzhen  Chang Liping  Zhang Bai  Zhang Shuwen  Huang Tieqing 《中国地理科学(英文版)》1996,6(4):342-350

ＬＡＮＤ　ＲＥＳＯＵＲＣＥＳ　ＳＵＲＶＥＹ　ＢＹ　ＲＥＭＯＴＥ　ＳＥＮＳＩＮＧ　ＡＮＤ　ＡＮＡＬＹＳＩＳ　ＯＦ　ＬＡＮＤ　ＣＡＲＲＹＩＮＧ　ＣＡＰＡＣＩＴＹ　ＦＯＲ　ＰＯＰＵＬＡＴＩＯＮ　ＩＮ　ＴＵＭＥＮ　ＲＩＶＥＲ　ＲＥＧＩＯＮＬＡＮＤＲＥＳＯＵＲ...  相似文献   

Mapgis SCS G2000在1：1万数字化制图中的应用     

刘玉刚  娄杰张君于峰  赵洪满 《吉林地质》2005,24(3):88-91

本文介绍了Mapgis、SCS G2000软件在1：1万比例尺地形图生产中的特点及利用软件的各自优点进行数字化的过程。  相似文献   

Tectonic setting of the Helong Block: Implications for the northern boundary of the eastern North China Craton     

ZHANG Yanbin  WU Fuyuan  ZHAI Mingguo & LU Xiaoping  . Institute of Geology  Geophysics  Chinese Academy of Sciences  P.O. Box  Beijing  China  . Regional Geological  Mineral Resources Survey of Jilin Province  Changchun  China 《中国科学D辑(英文版)》2005,48(10)

The Helong block, located in southeastern Jilin Province, was thought to be an Archean geological unit in the most northeast part of the North China Craton (NCC)[1,2]. Previous geological survey sug-gested that this block is mainly composed of two parts: Jinchengdong Archean metamorphic supracrustal rocks intruded by Archean TTG complex[3―5], and the Bailiping granite[6,7] distributed in the Shiliping-Bai- liping-Guangping area. Both of them were thought as the Jinchengdong (or Helong…  相似文献   

冲击反循环施工中的事故处理     

俞青山郭培合  李务伦王丽伟 《中国煤田地质》2006,18(3):68-69,74

以沈阳虎石台煤机厂生产的反循环钻机为例，介绍了冲击反循环大孔径施工中常见的事故及处理方法。如制作绳索捞取工具及平面搂钩工具打捞砂管丢失；利用钻机大、小臂进行单绳左右冲击处理软砂地层夹钻事故；在钻头处制作圆楔形钢圈打捞开焊震掉的最小底圈，等等，并根据实践经验，分别绘制了相应工具的结构示意图。  相似文献   

川西新场地区须二气藏天然裂缝分布综合预测及评价(下)     

毕海龙  周文  谢润成  邓虎成 《物探化探计算技术》2013,35(1):76-78,2

川西新场须二气藏天然裂缝发育,成因期次复杂,是影响开发产能的一个重要因素。通过对野外岩心、薄片中天然裂缝的调查、鉴定及统计等工作,对天然裂缝的发育特征进行了归纳和总结;从岩层厚度、构造变形、断层、岩性、物性等不同地质因素,分析了其对天然裂缝发育的控制作用,并了解了天然裂缝发育的主要控制因素。在天然裂缝特征、主控因素认识的前提下,通过对比分析单一因素裂缝预测结果与单井裂缝解释结果的吻合率确定了各因素的影响权值,并综合考虑主控因素建立了适合新场须二气藏天然裂缝分布预测综合评价因子。通过生产动态资料对裂缝分布预测结果进行了评价,吻合率达到80%以上,预测结果满足了开发应用的精度要求。  相似文献   

AUTOCAD一种快速分层展点的方法     

胡志强  杨海成 《吉林地质》2013,(3):127-129

针对目前测绘软件所展点均在同一图层,对照草图内业编辑时,图面点位多时,不方便编辑。故提出利用二次开发语言编写程序,在展点时,按照代码分层,为地形图编绘提供便利。  相似文献