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Keywords oal formed gas;Geologic evaluation;Stress analysis;Evaluation;Formation pressure;Desorption;Pressure;Gas well productivity; 煤成气;地质评价;应力分析;评价;地层压力;解吸;压力;气井产能;
Keywords oal formed gas;Exploration region;Selection;Evaluation;Underground;Stress analysis;Formation pressure;Hydrodynamic condition;Water drive.; 煤成气;勘探区;选择;评价;地下应力分析;地层压力;水动力条件;水驱;
Keywords oal;Anaerobic bacteria;Biodegradation;Coal formed gas;Laboratory testing; 煤;厌氧细菌;生物降解;煤成气;实验室试验;
Underbalanced drilling increases deliverability form gas storage wells. 采用欠平衡钻井增加油气贮备井的开采量。
Instead, the contaminating grease reacts with the acid to form gas bubbles. 相反地，残留的油脂会和酸反应产生气泡。
Unconformity surface and sandbody transported gas to surrounding ancient uplifts and formed gas reservoirs. 不整合面和砂体将天然气输导到四周古隆起上聚集成藏。
Keywords oal lipid;application;functional property; 燕麦脂质;应用;功能性;
Gas sourse rock that form gas almost are deep grey, grey black and black mudrock, siltstone and brown coal in Quaternary. 气源主要来自第四系深灰、灰黑及黑色泥质岩和褐煤层,源岩有机质丰度高。
Episodic activities of fauls could prompt thermogenic gas to leak upwards and form gas hydrate in the stable zone of gas hydrate. 在天然气田与天然气水合物的共存区域，可以形成两种类型的水合物：一种是构造渗漏型，它是以高浓度的深部热解气为主、以浅层生物气为辅的水合物；
Keywords oal;electrical conductivity;coal structure; 煤;导电性;煤结构;
The center of Xujiaweizi depression is the most favorable area for gas to accumulate and form gas reservoirs from the matching relation between caprock and sourcerock. 认为从盖源时空匹配关系上可以判断徐家围子断陷中心处应是徐家围子地区天然气成藏的有利地区。
Keywords oal bearing formation;growth faults;tectonic control; 含煤建造;生长断层;构造控制;
Keywords oal;Fluidized bed combustion;Nitrous oxide.; 煤;流化床燃烧;氧化亚氮;
Dai Jinxing, Zhong Ningning, Liu Dehan, Xia Xinyu, Yang Jianye and Tang Dazhen.1997.The Geological Base and Main Controlling Factors on the Large and Medium Coal Formed Gas Field.Beijing: Geological Publ.House. 戴金星;钟宁宁;刘德汉;夏新宇;杨建业;汤达祯.;1997
Keywords oal seams;directional drilling;compound drilling tool;stabilizer.; 煤层;定向钻进;组合钻具;稳定器;
A blowing agent, such as the polyester polyol used in this experiment, forms gas bubbles in the reaction as it polymerizes. 一个吹的代理, 譬如聚酯多羟基化合物被使用在这个实验, 形成气泡在反应当它聚合。
Keywords oal face;ventilation method;gas-logged and inflammable thick seam; 采煤工作面;通风方式;高瓦斯易自燃厚煤层;
The study on gas hydrate enrichment in the passive continental margin showed the importance of thermogenic gas for forming gas hydrate. 对被动大陆边缘水合物的富集规律研究表明：热解成因天然气水合物在被动大陆边缘占有重要地位，被动陆缘的活动断裂、底辟构造、滑塌堆积、断裂坡折带和海底扇砂体对天然气水合物的富集过程具有重要的控制作用。
Compared with the onshore,offshore Bohai has better geological conditi ons for forming gas pools,there is much better exploration potential in the offs hore. 海域天然气勘探也取得一定的成效，由于形成条件要优于陆上，勘探前景更为广阔。
Keywords oal bed;Pore structure;Permeability;Geologic model;Mathematical model.; 煤层;孔隙结构;渗透率;地质模型;数学模型;