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- Several coal beds are developed in backswamp deposits. 河漫沼泽上发育多套煤层。
- It is a new way of the utilization of coal bed gas. 为井下抽放煤层气的利用提出了一条新的途径。
- Coal Bed Methane Drilling and Completion Technology in Western Basin of U.S. 美国西部盆地煤层气钻井和完井技术。
- The abundant plant fossils in coal beds indicate that they originated in warm, freshwater-swampy forests, much as peat bogs form now. 在煤层中出现的大量植物化石表明,煤是形成于温暖的具新鲜水的沼泽森林之中,很像现今的泥炭沼泽环境。
- Preliminary research on structural law of coal bed beneath nappe in No. 对新集二矿推覆体下煤层构造规律进行了初步研究。
- Graphite deposit of Heye was formed by metamorphism of the Permian coal bed. 荷叶石墨矿是由二叠系煤层变质而成的石墨矿床,石墨与煤呈同层异矿关系。
- The extensively presence of coal beds indicates vast hydrocarbon potential in Xihu Sag. 广泛分布的煤层揭示了西湖凹陷广阔的生烃潜力。
- There are many coal beds and various coal ranksni Jixi basin, which is a Mesozoic and cenozoic coal basin. 鸡西盆地是一个多煤层、多煤种的中、新生代聚煤盆地,丰富的煤炭资源为煤成气的形成提供了充足的物质基础。
- Field applications show that this technique can effectively prevent coal beds sloughing and decrease hole problems and drilling accidents. 现场应用表明,该技术能有效地防止煤层坍塌,减少井下复杂情况及事故。
- Radioelement existing in domestic coal beds is discharged into atmosphere,solid and water environment via medium of smoke coal ash and slag etc. 国内煤层中普遍存在的天然放射性核素,通过燃煤产生的烟气、煤灰渣等介质进入空气、土壤和水环境中。
- In Bijie Coal Field, coal beds are many and steady, coal quality is good and resources are rich, associated with highquality pyrite. 毕节煤田煤层多而稳定,煤质好,资源量丰富,并伴生有丰富的硫铁矿,开采技术条件简单,潜在经济价值可观。
- Using the well and seismic data,the occurrence and distribution of coal beds in Hailar Basin are evaluated and predicted in this paper. 利用钻井和地震资料,评价和预测了海拉尔盆地煤层的发育和分布,结合煤层含气量参数,预测了盆地内的煤层气资源前景。
- Based on the analysis of mechanism of wellbore unstability, a series of drilling technical measures in coal beds are put forward. 在分析煤层井壁失稳机理的基础上,对影响煤层井壁失稳的因素进行了逐一剖析,提出了一整套煤层安全钻进的技术措施。
- Utilizaton of autogenous ignition coal gangue light aggregate 自燃煤矸石轻集料的利用
- M2B tools acoustic amplitude and variable density signals become distortional in large boreholes, slow formation such as coal beds, and so on. 但该仪器在大井眼、煤层等慢速地层、低密度固井井段,声幅及变密度曲线有失真现象。
- Porosity logging methods examining gas reservoirs of sandstone and argillaceous sandstone through acoustic wave and density are effectively used in coal beds. 煤田中在煤层附近有煤层气砂岩储层、泥质砂岩储层的存在,声波、密度两种孔隙度测井是进行孔隙度探测的有效方法。
- I do not like to go to the movies by my self. 我不喜欢自己一个人看电影。
- Hydrocarbon generated from Middle-Lower Jurassic coal beds as the main source rock in the basin has remarkably high Pr/ph ratio as well as heavy carbon isotope and C29 sterane. 中、下侏罗统煤系地层是主要的烃源岩,这套源岩生成的油气具有显著的姥鲛烷优势、重碳同位素以及富含C29甾烷等特征。
- I my self is going to make a sandwich. 我要亲手做个三明治。
- The ignition of the forest was caused by lightning. 森林起火是由雷电引起的。